/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/hard-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:42:04,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:42:04,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:42:04,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:42:04,720 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 22:42:04,735 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:42:04,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:42:04,736 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:42:04,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:42:04,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:42:04,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:42:04,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:42:04,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:42:04,737 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:42:04,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:42:04,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:42:04,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:42:04,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:42:04,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:42:04,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:42:04,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:42:04,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:42:04,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:42:04,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:42:04,739 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:42:04,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:42:04,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:42:04,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:42:04,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:42:04,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:42:04,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:42:04,928 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:42:04,928 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:42:04,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2022-01-09 22:42:04,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361423f57/c87c2e2ba88f42fc803b767bef716875/FLAG511d251cb [2022-01-09 22:42:05,348 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:42:05,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2022-01-09 22:42:05,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361423f57/c87c2e2ba88f42fc803b767bef716875/FLAG511d251cb [2022-01-09 22:42:05,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/361423f57/c87c2e2ba88f42fc803b767bef716875 [2022-01-09 22:42:05,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:42:05,371 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:42:05,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:42:05,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:42:05,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:42:05,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ed8c35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05, skipping insertion in model container [2022-01-09 22:42:05,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:42:05,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:42:05,551 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/hard-ll_unwindbound5.c[538,551] [2022-01-09 22:42:05,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:42:05,573 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:42:05,581 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/hard-ll_unwindbound5.c[538,551] [2022-01-09 22:42:05,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:42:05,593 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:42:05,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05 WrapperNode [2022-01-09 22:42:05,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:42:05,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:42:05,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:42:05,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:42:05,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,615 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-01-09 22:42:05,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:42:05,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:42:05,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:42:05,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:42:05,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:42:05,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:42:05,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:42:05,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:42:05,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (1/1) ... [2022-01-09 22:42:05,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:42:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:42:05,653 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 22:42:05,660 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 22:42:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:42:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:42:05,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:42:05,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:42:05,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-09 22:42:05,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-09 22:42:05,728 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:42:05,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:42:05,802 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:42:05,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:42:05,807 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 22:42:05,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:42:05 BoogieIcfgContainer [2022-01-09 22:42:05,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:42:05,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:42:05,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:42:05,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:42:05,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:42:05" (1/3) ... [2022-01-09 22:42:05,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fde7c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:42:05, skipping insertion in model container [2022-01-09 22:42:05,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:42:05" (2/3) ... [2022-01-09 22:42:05,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fde7c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:42:05, skipping insertion in model container [2022-01-09 22:42:05,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:42:05" (3/3) ... [2022-01-09 22:42:05,822 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2022-01-09 22:42:05,825 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:42:05,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:42:05,858 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:42:05,863 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 22:42:05,863 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:42:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 22:42:05,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-09 22:42:05,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:05,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:05,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2022-01-09 22:42:05,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:05,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215184693] [2022-01-09 22:42:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:05,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:06,038 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 22:42:06,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:06,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215184693] [2022-01-09 22:42:06,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215184693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:42:06,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:42:06,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:42:06,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448186010] [2022-01-09 22:42:06,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:42:06,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:42:06,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:42:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:42:06,072 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 22:42:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:06,090 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2022-01-09 22:42:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:42:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 22:42:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:06,097 INFO L225 Difference]: With dead ends: 53 [2022-01-09 22:42:06,098 INFO L226 Difference]: Without dead ends: 24 [2022-01-09 22:42:06,101 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 22:42:06,104 INFO L933 BasicCegarLoop]: 38 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, 38 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 22:42:06,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:42:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-09 22:42:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-09 22:42:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:42:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-01-09 22:42:06,133 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-01-09 22:42:06,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:06,134 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-01-09 22:42:06,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 22:42:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-01-09 22:42:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-09 22:42:06,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:06,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:06,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:42:06,136 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2022-01-09 22:42:06,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:06,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132370819] [2022-01-09 22:42:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:06,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:06,249 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 22:42:06,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:06,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132370819] [2022-01-09 22:42:06,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132370819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:42:06,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:42:06,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:42:06,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378737456] [2022-01-09 22:42:06,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:42:06,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:42:06,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:06,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:42:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:42:06,252 INFO L87 Difference]: Start difference. First operand 24 states and 34 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 22:42:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:06,294 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-01-09 22:42:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:42:06,295 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 22:42:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:06,296 INFO L225 Difference]: With dead ends: 38 [2022-01-09 22:42:06,296 INFO L226 Difference]: Without dead ends: 36 [2022-01-09 22:42:06,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 22:42:06,297 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:06,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 112 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:42:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-09 22:42:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-01-09 22:42:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:42:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-01-09 22:42:06,303 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-01-09 22:42:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:06,303 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-01-09 22:42:06,304 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 22:42:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-01-09 22:42:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 22:42:06,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:06,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:06,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:42:06,305 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2022-01-09 22:42:06,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:06,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731768489] [2022-01-09 22:42:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:06,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:06,355 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 22:42:06,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:06,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731768489] [2022-01-09 22:42:06,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731768489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:42:06,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:42:06,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:42:06,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423884316] [2022-01-09 22:42:06,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:42:06,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:42:06,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:42:06,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:42:06,358 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 22:42:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:06,385 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-01-09 22:42:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:42:06,386 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), 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 12 [2022-01-09 22:42:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:06,389 INFO L225 Difference]: With dead ends: 44 [2022-01-09 22:42:06,389 INFO L226 Difference]: Without dead ends: 30 [2022-01-09 22:42:06,389 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 22:42:06,390 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:06,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:42:06,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-09 22:42:06,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-09 22:42:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:42:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-01-09 22:42:06,395 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-01-09 22:42:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:06,396 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-01-09 22:42:06,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 22:42:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-01-09 22:42:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-09 22:42:06,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:06,396 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:06,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 22:42:06,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:06,397 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2022-01-09 22:42:06,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:06,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438288384] [2022-01-09 22:42:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:06,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-09 22:42:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:42:06,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438288384] [2022-01-09 22:42:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438288384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:42:06,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:42:06,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:42:06,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791187844] [2022-01-09 22:42:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:42:06,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:42:06,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:42:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:42:06,473 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 22:42:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:06,537 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-01-09 22:42:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:42:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-09 22:42:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:06,539 INFO L225 Difference]: With dead ends: 44 [2022-01-09 22:42:06,539 INFO L226 Difference]: Without dead ends: 42 [2022-01-09 22:42:06,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 22:42:06,540 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:06,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 108 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:42:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-09 22:42:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-01-09 22:42:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:42:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-01-09 22:42:06,546 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2022-01-09 22:42:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:06,547 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-01-09 22:42:06,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 22:42:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-01-09 22:42:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 22:42:06,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:06,547 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:06,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 22:42:06,548 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2022-01-09 22:42:06,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:06,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666326489] [2022-01-09 22:42:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:06,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:06,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:42:06,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156916999] [2022-01-09 22:42:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:06,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:42:06,581 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 22:42:06,582 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 22:42:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:06,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-09 22:42:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:42:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:42:06,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:42:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:42:06,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666326489] [2022-01-09 22:42:06,980 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:42:06,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156916999] [2022-01-09 22:42:06,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156916999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:42:06,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:42:06,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-01-09 22:42:06,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126223836] [2022-01-09 22:42:06,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:42:06,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-09 22:42:06,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:06,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-09 22:42:06,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:42:06,981 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:42:07,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:07,578 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2022-01-09 22:42:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 22:42:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2022-01-09 22:42:07,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:07,581 INFO L225 Difference]: With dead ends: 75 [2022-01-09 22:42:07,581 INFO L226 Difference]: Without dead ends: 59 [2022-01-09 22:42:07,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:42:07,582 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:07,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 128 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:42:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-09 22:42:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-01-09 22:42:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-09 22:42:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-01-09 22:42:07,591 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 20 [2022-01-09 22:42:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:07,591 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-01-09 22:42:07,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:42:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-01-09 22:42:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 22:42:07,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:07,592 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:07,613 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 22:42:07,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:07,810 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:07,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2022-01-09 22:42:07,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:07,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775146127] [2022-01-09 22:42:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:07,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:07,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:42:07,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115622226] [2022-01-09 22:42:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:07,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:07,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:42:07,820 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 22:42:07,821 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 22:42:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:07,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-09 22:42:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:42:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:42:07,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:42:07,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:07,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775146127] [2022-01-09 22:42:07,905 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:42:07,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115622226] [2022-01-09 22:42:07,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115622226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:42:07,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:42:07,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 22:42:07,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709986149] [2022-01-09 22:42:07,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:42:07,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:42:07,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:42:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:42:07,907 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:42:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:07,937 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2022-01-09 22:42:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:42:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-09 22:42:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:07,938 INFO L225 Difference]: With dead ends: 72 [2022-01-09 22:42:07,963 INFO L226 Difference]: Without dead ends: 65 [2022-01-09 22:42:07,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:42:07,964 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:07,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 117 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:42:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-09 22:42:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-09 22:42:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 44 states have internal predecessors, (49), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-09 22:42:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-01-09 22:42:07,989 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 28 [2022-01-09 22:42:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:07,990 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-01-09 22:42:07,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:42:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-01-09 22:42:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 22:42:07,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:07,990 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:08,010 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 22:42:08,211 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,SelfDestructingSolverStorable5 [2022-01-09 22:42:08,212 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2022-01-09 22:42:08,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:08,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62212901] [2022-01-09 22:42:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:08,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:08,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:42:08,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612213446] [2022-01-09 22:42:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:08,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:42:08,222 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 22:42:08,223 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 22:42:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:08,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:42:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:42:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:42:08,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:42:08,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:08,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62212901] [2022-01-09 22:42:08,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:42:08,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612213446] [2022-01-09 22:42:08,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612213446] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:42:08,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:42:08,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:42:08,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812527627] [2022-01-09 22:42:08,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:42:08,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:42:08,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:42:08,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:42:08,344 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:42:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:08,430 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2022-01-09 22:42:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:42:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-09 22:42:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:08,432 INFO L225 Difference]: With dead ends: 79 [2022-01-09 22:42:08,433 INFO L226 Difference]: Without dead ends: 71 [2022-01-09 22:42:08,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 22:42:08,435 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:08,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 94 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:42:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-09 22:42:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-09 22:42:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-09 22:42:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-01-09 22:42:08,446 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 28 [2022-01-09 22:42:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:08,446 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-01-09 22:42:08,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:42:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-01-09 22:42:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-09 22:42:08,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:08,447 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:08,469 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 22:42:08,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:08,656 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1091220578, now seen corresponding path program 1 times [2022-01-09 22:42:08,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498471621] [2022-01-09 22:42:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:08,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:08,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:42:08,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3941864] [2022-01-09 22:42:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:08,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:08,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:42:08,666 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 22:42:08,667 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 22:42:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-09 22:42:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:42:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 22:42:08,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:42:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-09 22:42:08,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:08,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498471621] [2022-01-09 22:42:08,811 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:42:08,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3941864] [2022-01-09 22:42:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3941864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:42:08,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:42:08,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-01-09 22:42:08,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529044415] [2022-01-09 22:42:08,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:42:08,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:42:08,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:42:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:42:08,816 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-09 22:42:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:08,921 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2022-01-09 22:42:08,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 22:42:08,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 35 [2022-01-09 22:42:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:08,923 INFO L225 Difference]: With dead ends: 163 [2022-01-09 22:42:08,923 INFO L226 Difference]: Without dead ends: 127 [2022-01-09 22:42:08,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:42:08,924 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:08,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 155 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:42:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-09 22:42:08,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2022-01-09 22:42:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 83 states have internal predecessors, (90), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-09 22:42:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2022-01-09 22:42:08,948 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 35 [2022-01-09 22:42:08,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:08,949 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2022-01-09 22:42:08,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-09 22:42:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2022-01-09 22:42:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-09 22:42:08,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:08,951 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:08,970 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 22:42:09,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:09,152 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:09,152 INFO L85 PathProgramCache]: Analyzing trace with hash -785132454, now seen corresponding path program 1 times [2022-01-09 22:42:09,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:09,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693810627] [2022-01-09 22:42:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:09,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:09,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:42:09,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954906298] [2022-01-09 22:42:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:09,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:09,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:42:09,171 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 22:42:09,172 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 22:42:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:09,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:42:09,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:42:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-09 22:42:09,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:42:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-09 22:42:09,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:42:09,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693810627] [2022-01-09 22:42:09,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:42:09,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954906298] [2022-01-09 22:42:09,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954906298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:42:09,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:42:09,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-01-09 22:42:09,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566119780] [2022-01-09 22:42:09,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:42:09,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 22:42:09,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:42:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 22:42:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:42:09,367 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-09 22:42:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:42:09,476 INFO L93 Difference]: Finished difference Result 189 states and 222 transitions. [2022-01-09 22:42:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 22:42:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 51 [2022-01-09 22:42:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:42:09,477 INFO L225 Difference]: With dead ends: 189 [2022-01-09 22:42:09,477 INFO L226 Difference]: Without dead ends: 168 [2022-01-09 22:42:09,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:42:09,478 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:42:09,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 209 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:42:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-09 22:42:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2022-01-09 22:42:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 116 states have internal predecessors, (127), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-09 22:42:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2022-01-09 22:42:09,491 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 51 [2022-01-09 22:42:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:42:09,491 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2022-01-09 22:42:09,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-09 22:42:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2022-01-09 22:42:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-09 22:42:09,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:42:09,492 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:42:09,511 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 22:42:09,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:09,709 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:42:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:42:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 98519191, now seen corresponding path program 1 times [2022-01-09 22:42:09,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:42:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882268810] [2022-01-09 22:42:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:09,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:42:09,717 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:42:09,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597777376] [2022-01-09 22:42:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:42:09,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:42:09,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:42:09,718 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 22:42:09,719 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 22:42:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:42:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 22:42:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:42:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-09 22:42:10,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:42:47,001 WARN L228 SmtUtils]: Spent 21.42s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)