/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:48:23,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:48:23,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:48:23,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:48:23,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:48:23,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:48:23,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:48:23,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:48:23,863 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:48:23,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:48:23,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:48:23,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:48:23,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:48:23,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:48:23,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:48:23,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:48:23,865 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:48:23,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:48:23,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:48:23,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:48:23,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:48:23,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:48:23,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:48:23,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:48:23,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:48:23,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:48:23,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:48:23,868 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:48:23,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:48:23,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:48:23,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:48:24,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:48:24,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:48:24,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:48:24,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:48:24,097 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:48:24,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-01-09 22:48:24,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17bf6fad5/666c0d1941e34952a1d1baca55ff0197/FLAG45509e51e [2022-01-09 22:48:24,503 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:48:24,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-01-09 22:48:24,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17bf6fad5/666c0d1941e34952a1d1baca55ff0197/FLAG45509e51e [2022-01-09 22:48:24,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17bf6fad5/666c0d1941e34952a1d1baca55ff0197 [2022-01-09 22:48:24,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:48:24,528 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:48:24,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:48:24,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:48:24,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:48:24,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a947ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24, skipping insertion in model container [2022-01-09 22:48:24,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:48:24,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:48:24,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2022-01-09 22:48:24,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:48:24,713 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:48:24,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2022-01-09 22:48:24,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:48:24,768 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:48:24,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24 WrapperNode [2022-01-09 22:48:24,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:48:24,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:48:24,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:48:24,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:48:24,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,809 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-01-09 22:48:24,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:48:24,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:48:24,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:48:24,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:48:24,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:48:24,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:48:24,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:48:24,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:48:24,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (1/1) ... [2022-01-09 22:48:24,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:48:24,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:24,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 22:48:24,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 22:48:24,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:48:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:48:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:48:24,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:48:24,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-09 22:48:24,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-09 22:48:24,943 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:48:24,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:48:25,095 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:48:25,099 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:48:25,100 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 22:48:25,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:48:25 BoogieIcfgContainer [2022-01-09 22:48:25,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:48:25,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:48:25,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:48:25,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:48:25,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:48:24" (1/3) ... [2022-01-09 22:48:25,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566388a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:48:25, skipping insertion in model container [2022-01-09 22:48:25,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:24" (2/3) ... [2022-01-09 22:48:25,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566388a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:48:25, skipping insertion in model container [2022-01-09 22:48:25,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:48:25" (3/3) ... [2022-01-09 22:48:25,126 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2022-01-09 22:48:25,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:48:25,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:48:25,197 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:48:25,201 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 22:48:25,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:48:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 22:48:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-09 22:48:25,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:25,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:25,219 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2022-01-09 22:48:25,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:25,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310867108] [2022-01-09 22:48:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:25,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:25,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:25,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310867108] [2022-01-09 22:48:25,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310867108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:48:25,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:48:25,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:48:25,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775149335] [2022-01-09 22:48:25,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:48:25,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:48:25,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:25,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:48:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:48:25,368 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:48:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:25,383 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-09 22:48:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:48:25,385 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-09 22:48:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:25,393 INFO L225 Difference]: With dead ends: 43 [2022-01-09 22:48:25,393 INFO L226 Difference]: Without dead ends: 19 [2022-01-09 22:48:25,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:48:25,402 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:25,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:48:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-09 22:48:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-09 22:48:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-01-09 22:48:25,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2022-01-09 22:48:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:25,430 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-01-09 22:48:25,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:48:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-01-09 22:48:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-09 22:48:25,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:25,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:25,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:48:25,432 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2022-01-09 22:48:25,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:25,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028892436] [2022-01-09 22:48:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:25,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:25,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028892436] [2022-01-09 22:48:25,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028892436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:48:25,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:48:25,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:48:25,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748475135] [2022-01-09 22:48:25,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:48:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:48:25,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:48:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:48:25,507 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:48:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:25,520 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-01-09 22:48:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:48:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-09 22:48:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:25,521 INFO L225 Difference]: With dead ends: 29 [2022-01-09 22:48:25,521 INFO L226 Difference]: Without dead ends: 21 [2022-01-09 22:48:25,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:48:25,522 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:25,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:48:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-09 22:48:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-09 22:48:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-01-09 22:48:25,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2022-01-09 22:48:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:25,528 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-01-09 22:48:25,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:48:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-01-09 22:48:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-09 22:48:25,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:25,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:25,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:48:25,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:25,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2022-01-09 22:48:25,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:25,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144089711] [2022-01-09 22:48:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:25,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:25,541 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:25,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671335708] [2022-01-09 22:48:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:25,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:25,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:48:25,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:48:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-09 22:48:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:25,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:48:25,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:25,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144089711] [2022-01-09 22:48:25,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:25,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671335708] [2022-01-09 22:48:25,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671335708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:48:25,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:48:25,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:48:25,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557353179] [2022-01-09 22:48:25,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:48:25,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:48:25,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:25,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:48:25,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:48:25,684 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:48:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:25,731 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-01-09 22:48:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:48:25,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-09 22:48:25,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:25,732 INFO L225 Difference]: With dead ends: 34 [2022-01-09 22:48:25,732 INFO L226 Difference]: Without dead ends: 32 [2022-01-09 22:48:25,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:48:25,733 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:25,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:48:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-09 22:48:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-01-09 22:48:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 22:48:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-09 22:48:25,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2022-01-09 22:48:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:25,739 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-09 22:48:25,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:48:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-09 22:48:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-09 22:48:25,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:25,740 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:25,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:48:25,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:25,959 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2022-01-09 22:48:25,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:25,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865468041] [2022-01-09 22:48:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:25,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:25,967 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:25,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825267318] [2022-01-09 22:48:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:25,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:25,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:25,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:48:25,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:48:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 22:48:26,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:26,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:48:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:26,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865468041] [2022-01-09 22:48:26,430 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825267318] [2022-01-09 22:48:26,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825267318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:48:26,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:48:26,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-01-09 22:48:26,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57100933] [2022-01-09 22:48:26,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:48:26,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 22:48:26,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 22:48:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-09 22:48:26,437 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:26,750 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-01-09 22:48:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 22:48:26,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-09 22:48:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:26,752 INFO L225 Difference]: With dead ends: 47 [2022-01-09 22:48:26,752 INFO L226 Difference]: Without dead ends: 45 [2022-01-09 22:48:26,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-01-09 22:48:26,753 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:26,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 101 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:48:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-09 22:48:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-01-09 22:48:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:48:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-01-09 22:48:26,759 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2022-01-09 22:48:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:26,759 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-01-09 22:48:26,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-01-09 22:48:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 22:48:26,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:26,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:26,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:48:26,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-09 22:48:26,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:26,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:26,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2022-01-09 22:48:26,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:26,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442995052] [2022-01-09 22:48:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:26,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:26,983 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:26,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072184899] [2022-01-09 22:48:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:26,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:26,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:26,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:48:26,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:48:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-09 22:48:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:48:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:27,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:27,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442995052] [2022-01-09 22:48:27,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:27,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072184899] [2022-01-09 22:48:27,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072184899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:48:27,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:48:27,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-01-09 22:48:27,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962675320] [2022-01-09 22:48:27,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:48:27,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:48:27,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:48:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:48:27,097 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:48:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:27,128 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-01-09 22:48:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:48:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-09 22:48:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:27,129 INFO L225 Difference]: With dead ends: 57 [2022-01-09 22:48:27,129 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 22:48:27,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:48:27,130 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:27,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 84 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:48:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 22:48:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-01-09 22:48:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 22:48:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-01-09 22:48:27,136 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 19 [2022-01-09 22:48:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:27,136 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-01-09 22:48:27,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:48:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-01-09 22:48:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 22:48:27,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:27,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:27,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:48:27,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:27,358 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2022-01-09 22:48:27,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:27,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142224515] [2022-01-09 22:48:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:27,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:27,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:27,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467212464] [2022-01-09 22:48:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:27,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:27,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:48:27,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:48:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:27,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-09 22:48:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:27,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:48:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:48:28,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142224515] [2022-01-09 22:48:28,389 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467212464] [2022-01-09 22:48:28,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467212464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:48:28,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:48:28,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-09 22:48:28,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679944732] [2022-01-09 22:48:28,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:48:28,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 22:48:28,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 22:48:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:48:28,390 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:29,634 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2022-01-09 22:48:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 22:48:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-01-09 22:48:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:29,636 INFO L225 Difference]: With dead ends: 69 [2022-01-09 22:48:29,636 INFO L226 Difference]: Without dead ends: 67 [2022-01-09 22:48:29,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:48:29,637 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 107 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:29,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 93 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-09 22:48:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-09 22:48:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2022-01-09 22:48:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 22:48:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-01-09 22:48:29,645 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 19 [2022-01-09 22:48:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:29,645 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-01-09 22:48:29,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-01-09 22:48:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 22:48:29,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:29,645 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:29,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:48:29,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:29,859 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:29,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2022-01-09 22:48:29,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:29,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865710556] [2022-01-09 22:48:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:29,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:29,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:29,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414138152] [2022-01-09 22:48:29,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:29,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:29,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:29,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:48:29,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:48:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:29,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 22:48:29,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:48:29,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:48:29,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:29,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865710556] [2022-01-09 22:48:29,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:29,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414138152] [2022-01-09 22:48:29,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414138152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:48:29,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:48:29,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-09 22:48:29,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848192977] [2022-01-09 22:48:29,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:48:29,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:48:29,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:29,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:48:29,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:48:29,960 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:30,045 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-01-09 22:48:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:48:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-09 22:48:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:30,047 INFO L225 Difference]: With dead ends: 68 [2022-01-09 22:48:30,047 INFO L226 Difference]: Without dead ends: 52 [2022-01-09 22:48:30,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:48:30,048 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:30,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 86 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:48:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-09 22:48:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-01-09 22:48:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 22:48:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-01-09 22:48:30,055 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 21 [2022-01-09 22:48:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:30,055 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-01-09 22:48:30,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:48:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-01-09 22:48:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 22:48:30,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:30,056 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:30,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:48:30,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:30,273 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 55344605, now seen corresponding path program 2 times [2022-01-09 22:48:30,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:30,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374373473] [2022-01-09 22:48:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:30,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:30,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968682250] [2022-01-09 22:48:30,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:48:30,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:30,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:30,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:48:30,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:48:30,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:48:30,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-01-09 22:48:30,324 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-09 22:48:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-09 22:48:30,349 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-09 22:48:30,349 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-09 22:48:30,350 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-09 22:48:30,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:48:30,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:30,554 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-01-09 22:48:30,556 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-09 22:48:30,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.01 10:48:30 BoogieIcfgContainer [2022-01-09 22:48:30,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-09 22:48:30,576 INFO L158 Benchmark]: Toolchain (without parser) took 6048.31ms. Allocated memory was 174.1MB in the beginning and 252.7MB in the end (delta: 78.6MB). Free memory was 116.4MB in the beginning and 86.2MB in the end (delta: 30.2MB). Peak memory consumption was 110.4MB. Max. memory is 8.0GB. [2022-01-09 22:48:30,576 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 174.1MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-09 22:48:30,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.46ms. Allocated memory was 174.1MB in the beginning and 252.7MB in the end (delta: 78.6MB). Free memory was 116.2MB in the beginning and 226.1MB in the end (delta: -109.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-01-09 22:48:30,577 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.13ms. Allocated memory is still 252.7MB. Free memory was 226.1MB in the beginning and 224.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-09 22:48:30,577 INFO L158 Benchmark]: Boogie Preprocessor took 28.52ms. Allocated memory is still 252.7MB. Free memory was 224.5MB in the beginning and 223.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-09 22:48:30,577 INFO L158 Benchmark]: RCFGBuilder took 261.23ms. Allocated memory is still 252.7MB. Free memory was 223.4MB in the beginning and 211.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-09 22:48:30,577 INFO L158 Benchmark]: TraceAbstraction took 5473.91ms. Allocated memory is still 252.7MB. Free memory was 211.4MB in the beginning and 86.2MB in the end (delta: 125.2MB). Peak memory consumption was 126.7MB. Max. memory is 8.0GB. [2022-01-09 22:48:30,578 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 174.1MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.46ms. Allocated memory was 174.1MB in the beginning and 252.7MB in the end (delta: 78.6MB). Free memory was 116.2MB in the beginning and 226.1MB in the end (delta: -109.9MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.13ms. Allocated memory is still 252.7MB. Free memory was 226.1MB in the beginning and 224.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.52ms. Allocated memory is still 252.7MB. Free memory was 224.5MB in the beginning and 223.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 261.23ms. Allocated memory is still 252.7MB. Free memory was 223.4MB in the beginning and 211.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 5473.91ms. Allocated memory is still 252.7MB. Free memory was 211.4MB in the beginning and 86.2MB in the end (delta: 125.2MB). Peak memory consumption was 126.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=4, b=4, counter=0, p=1, q=0, x=4, y=4] [L33] EXPR counter++ VAL [a=4, b=4, counter=1, counter++=0, p=1, q=0, x=4, y=4] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=4, b=4, counter=1, p=1, q=0, x=4, y=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2, b=2, counter=1, p=4, q=0, x=4, y=4] [L33] EXPR counter++ VAL [a=2, b=2, counter=2, counter++=1, p=4, q=0, x=4, y=4] [L33] COND TRUE counter++<2 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2, b=2, counter=2, p=4, q=0, x=4, y=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=2, b=2, counter=2, p=4, q=0, x=4, y=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1, b=1, counter=2, p=16, q=0, x=4, y=4] [L33] EXPR counter++ VAL [a=1, b=1, counter=3, counter++=2, p=16, q=0, x=4, y=4] [L33] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 245 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 243 mSDsluCounter, 514 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 367 mSDsCounter, 173 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 451 IncrementalHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 173 mSolverCounterUnsat, 147 mSDtfsCounter, 451 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred 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, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 968 SizeOfPredicates, 21 NumberOfNonLiveVariables, 371 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/30 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! [2022-01-09 22:48:30,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...