/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/systemc/mem_slave_tlm.2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:04:47,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:04:47,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:04:47,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:04:47,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:04:47,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:04:47,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:04:47,094 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 [2022-01-10 01:04:47,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:04:47,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:04:47,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:04:47,112 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:04:47,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:04:47,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:04:47,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:04:47,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:04:47,113 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:04:47,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:04:47,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:04:47,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:04:47,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:04:47,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:04:47,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:04:47,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:04:47,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:04:47,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:04:47,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:04:47,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:04:47,116 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:04:47,116 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:04:47,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:04:47,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:04:47,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:04:47,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:04:47,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:04:47,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:04:47,336 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:04:47,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c [2022-01-10 01:04:47,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d682388b4/71015ec84f19469c91f3d6e91c5a6156/FLAG8e799662e [2022-01-10 01:04:47,925 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:04:47,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c [2022-01-10 01:04:47,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d682388b4/71015ec84f19469c91f3d6e91c5a6156/FLAG8e799662e [2022-01-10 01:04:48,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d682388b4/71015ec84f19469c91f3d6e91c5a6156 [2022-01-10 01:04:48,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:04:48,282 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:04:48,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:04:48,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:04:48,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:04:48,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c95903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48, skipping insertion in model container [2022-01-10 01:04:48,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:04:48,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:04:48,561 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c[646,659] [2022-01-10 01:04:48,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:04:48,691 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:04:48,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/mem_slave_tlm.2.cil.c[646,659] [2022-01-10 01:04:48,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:04:48,790 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:04:48,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48 WrapperNode [2022-01-10 01:04:48,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:04:48,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:04:48,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:04:48,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:04:48,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,838 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 851 [2022-01-10 01:04:48,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:04:48,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:04:48,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:04:48,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:04:48,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:04:48,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:04:48,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:04:48,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:04:48,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (1/1) ... [2022-01-10 01:04:48,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:04:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:04:48,924 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) [2022-01-10 01:04:48,932 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 [2022-01-10 01:04:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:04:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:04:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-01-10 01:04:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-01-10 01:04:48,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:04:48,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:04:49,105 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:04:49,107 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:04:49,923 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:04:49,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:04:49,937 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2022-01-10 01:04:49,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:04:49 BoogieIcfgContainer [2022-01-10 01:04:49,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:04:49,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:04:49,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:04:49,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:04:49,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:04:48" (1/3) ... [2022-01-10 01:04:49,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d51c593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:04:49, skipping insertion in model container [2022-01-10 01:04:49,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:48" (2/3) ... [2022-01-10 01:04:49,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d51c593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:04:49, skipping insertion in model container [2022-01-10 01:04:49,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:04:49" (3/3) ... [2022-01-10 01:04:49,948 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.2.cil.c [2022-01-10 01:04:49,952 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:04:49,952 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:04:49,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:04:50,001 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 [2022-01-10 01:04:50,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:04:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 273 states, 265 states have (on average 1.8528301886792453) internal successors, (491), 271 states have internal predecessors, (491), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 01:04:50,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 01:04:50,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:50,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:50,034 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:50,037 INFO L85 PathProgramCache]: Analyzing trace with hash 193086899, now seen corresponding path program 1 times [2022-01-10 01:04:50,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686636645] [2022-01-10 01:04:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:50,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:50,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:50,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686636645] [2022-01-10 01:04:50,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686636645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:50,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:50,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:50,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471853524] [2022-01-10 01:04:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:50,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:50,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:50,267 INFO L87 Difference]: Start difference. First operand has 273 states, 265 states have (on average 1.8528301886792453) internal successors, (491), 271 states have internal predecessors, (491), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-01-10 01:04:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:50,521 INFO L93 Difference]: Finished difference Result 718 states and 1317 transitions. [2022-01-10 01:04:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:50,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 29 [2022-01-10 01:04:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:50,532 INFO L225 Difference]: With dead ends: 718 [2022-01-10 01:04:50,532 INFO L226 Difference]: Without dead ends: 442 [2022-01-10 01:04:50,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:50,538 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 259 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:50,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 773 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:04:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-10 01:04:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 429. [2022-01-10 01:04:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 423 states have (on average 1.5933806146572105) internal successors, (674), 427 states have internal predecessors, (674), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 679 transitions. [2022-01-10 01:04:50,583 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 679 transitions. Word has length 29 [2022-01-10 01:04:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:50,583 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 679 transitions. [2022-01-10 01:04:50,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-01-10 01:04:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 679 transitions. [2022-01-10 01:04:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 01:04:50,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:50,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:50,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:04:50,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1317478755, now seen corresponding path program 1 times [2022-01-10 01:04:50,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:50,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419495845] [2022-01-10 01:04:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:50,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:50,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:50,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419495845] [2022-01-10 01:04:50,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419495845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:50,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:50,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:50,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278059732] [2022-01-10 01:04:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:50,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:50,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:50,660 INFO L87 Difference]: Start difference. First operand 429 states and 679 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-01-10 01:04:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:50,766 INFO L93 Difference]: Finished difference Result 1125 states and 1805 transitions. [2022-01-10 01:04:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 38 [2022-01-10 01:04:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:50,771 INFO L225 Difference]: With dead ends: 1125 [2022-01-10 01:04:50,772 INFO L226 Difference]: Without dead ends: 710 [2022-01-10 01:04:50,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:50,779 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 322 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:50,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 1016 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-01-10 01:04:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 697. [2022-01-10 01:04:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 691 states have (on average 1.6266280752532563) internal successors, (1124), 695 states have internal predecessors, (1124), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1129 transitions. [2022-01-10 01:04:50,832 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1129 transitions. Word has length 38 [2022-01-10 01:04:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:50,832 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1129 transitions. [2022-01-10 01:04:50,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-01-10 01:04:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1129 transitions. [2022-01-10 01:04:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 01:04:50,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:50,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:50,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:04:50,835 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash 851929906, now seen corresponding path program 1 times [2022-01-10 01:04:50,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:50,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632919896] [2022-01-10 01:04:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:50,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:50,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:50,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632919896] [2022-01-10 01:04:50,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632919896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:50,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:50,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:50,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778945743] [2022-01-10 01:04:50,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:50,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:50,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:50,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:50,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:50,877 INFO L87 Difference]: Start difference. First operand 697 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-01-10 01:04:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:50,927 INFO L93 Difference]: Finished difference Result 1761 states and 2852 transitions. [2022-01-10 01:04:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2022-01-10 01:04:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:50,931 INFO L225 Difference]: With dead ends: 1761 [2022-01-10 01:04:50,931 INFO L226 Difference]: Without dead ends: 1089 [2022-01-10 01:04:50,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:50,933 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 349 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:50,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 809 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-01-10 01:04:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1078. [2022-01-10 01:04:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1072 states have (on average 1.617537313432836) internal successors, (1734), 1076 states have internal predecessors, (1734), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1739 transitions. [2022-01-10 01:04:50,977 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1739 transitions. Word has length 39 [2022-01-10 01:04:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:50,978 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1739 transitions. [2022-01-10 01:04:50,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-01-10 01:04:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1739 transitions. [2022-01-10 01:04:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 01:04:50,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:50,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:50,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 01:04:50,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 18237494, now seen corresponding path program 1 times [2022-01-10 01:04:50,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:50,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092283806] [2022-01-10 01:04:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:50,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:51,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:51,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092283806] [2022-01-10 01:04:51,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092283806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:51,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:51,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:04:51,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98664801] [2022-01-10 01:04:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:51,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:04:51,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:51,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:04:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:04:51,014 INFO L87 Difference]: Start difference. First operand 1078 states and 1739 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2022-01-10 01:04:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:51,326 INFO L93 Difference]: Finished difference Result 2970 states and 4767 transitions. [2022-01-10 01:04:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:04:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 48 [2022-01-10 01:04:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:51,333 INFO L225 Difference]: With dead ends: 2970 [2022-01-10 01:04:51,334 INFO L226 Difference]: Without dead ends: 1917 [2022-01-10 01:04:51,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:04:51,342 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 580 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:51,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 1546 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 01:04:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-01-10 01:04:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1684. [2022-01-10 01:04:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1678 states have (on average 1.5911799761620977) internal successors, (2670), 1682 states have internal predecessors, (2670), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2675 transitions. [2022-01-10 01:04:51,441 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2675 transitions. Word has length 48 [2022-01-10 01:04:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:51,442 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2675 transitions. [2022-01-10 01:04:51,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2022-01-10 01:04:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2675 transitions. [2022-01-10 01:04:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 01:04:51,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:51,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:51,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 01:04:51,444 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1086799520, now seen corresponding path program 1 times [2022-01-10 01:04:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:51,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024964800] [2022-01-10 01:04:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:51,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:51,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:51,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024964800] [2022-01-10 01:04:51,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024964800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:51,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:51,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:04:51,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987440542] [2022-01-10 01:04:51,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:51,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:04:51,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:51,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:04:51,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:04:51,529 INFO L87 Difference]: Start difference. First operand 1684 states and 2675 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2022-01-10 01:04:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:51,836 INFO L93 Difference]: Finished difference Result 4997 states and 7840 transitions. [2022-01-10 01:04:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:04:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 53 [2022-01-10 01:04:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:51,848 INFO L225 Difference]: With dead ends: 4997 [2022-01-10 01:04:51,848 INFO L226 Difference]: Without dead ends: 3332 [2022-01-10 01:04:51,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:04:51,852 INFO L933 BasicCegarLoop]: 380 mSDtfsCounter, 734 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:51,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1045 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:04:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2022-01-10 01:04:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2962. [2022-01-10 01:04:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2956 states have (on average 1.5639377537212449) internal successors, (4623), 2960 states have internal predecessors, (4623), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4628 transitions. [2022-01-10 01:04:51,922 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4628 transitions. Word has length 53 [2022-01-10 01:04:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:51,923 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 4628 transitions. [2022-01-10 01:04:51,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2022-01-10 01:04:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4628 transitions. [2022-01-10 01:04:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 01:04:51,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:51,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:51,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 01:04:51,925 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1057984617, now seen corresponding path program 1 times [2022-01-10 01:04:51,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864582407] [2022-01-10 01:04:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:51,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:51,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:51,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864582407] [2022-01-10 01:04:51,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864582407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:51,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:51,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:51,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572077450] [2022-01-10 01:04:51,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:51,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:51,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:51,970 INFO L87 Difference]: Start difference. First operand 2962 states and 4628 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-01-10 01:04:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:52,086 INFO L93 Difference]: Finished difference Result 6953 states and 10821 transitions. [2022-01-10 01:04:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:52,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 53 [2022-01-10 01:04:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:52,099 INFO L225 Difference]: With dead ends: 6953 [2022-01-10 01:04:52,099 INFO L226 Difference]: Without dead ends: 4014 [2022-01-10 01:04:52,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:52,104 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 364 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:52,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 704 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2022-01-10 01:04:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 3830. [2022-01-10 01:04:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3824 states have (on average 1.5431485355648535) internal successors, (5901), 3828 states have internal predecessors, (5901), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5906 transitions. [2022-01-10 01:04:52,203 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5906 transitions. Word has length 53 [2022-01-10 01:04:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:52,204 INFO L470 AbstractCegarLoop]: Abstraction has 3830 states and 5906 transitions. [2022-01-10 01:04:52,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-01-10 01:04:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5906 transitions. [2022-01-10 01:04:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 01:04:52,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:52,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:52,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 01:04:52,206 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1793836096, now seen corresponding path program 1 times [2022-01-10 01:04:52,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:52,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178277310] [2022-01-10 01:04:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:52,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:52,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:52,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178277310] [2022-01-10 01:04:52,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178277310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:52,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:52,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:52,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083534015] [2022-01-10 01:04:52,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:52,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:52,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:52,260 INFO L87 Difference]: Start difference. First operand 3830 states and 5906 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-01-10 01:04:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:52,516 INFO L93 Difference]: Finished difference Result 9202 states and 14308 transitions. [2022-01-10 01:04:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 59 [2022-01-10 01:04:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:52,532 INFO L225 Difference]: With dead ends: 9202 [2022-01-10 01:04:52,532 INFO L226 Difference]: Without dead ends: 5395 [2022-01-10 01:04:52,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:52,537 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 246 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:52,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 873 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2022-01-10 01:04:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4638. [2022-01-10 01:04:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4638 states, 4632 states have (on average 1.4853195164075994) internal successors, (6880), 4636 states have internal predecessors, (6880), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 6885 transitions. [2022-01-10 01:04:52,643 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 6885 transitions. Word has length 59 [2022-01-10 01:04:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:52,644 INFO L470 AbstractCegarLoop]: Abstraction has 4638 states and 6885 transitions. [2022-01-10 01:04:52,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-01-10 01:04:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 6885 transitions. [2022-01-10 01:04:52,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 01:04:52,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:52,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:52,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 01:04:52,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:52,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1530108436, now seen corresponding path program 1 times [2022-01-10 01:04:52,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:52,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204125859] [2022-01-10 01:04:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:52,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:52,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:52,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204125859] [2022-01-10 01:04:52,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204125859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:52,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:52,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:52,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083615834] [2022-01-10 01:04:52,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:52,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:52,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:52,699 INFO L87 Difference]: Start difference. First operand 4638 states and 6885 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2022-01-10 01:04:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:52,834 INFO L93 Difference]: Finished difference Result 9119 states and 13547 transitions. [2022-01-10 01:04:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 61 [2022-01-10 01:04:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:52,848 INFO L225 Difference]: With dead ends: 9119 [2022-01-10 01:04:52,848 INFO L226 Difference]: Without dead ends: 4504 [2022-01-10 01:04:52,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:52,856 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 341 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:52,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 439 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2022-01-10 01:04:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 4504. [2022-01-10 01:04:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4504 states, 4498 states have (on average 1.4626500666963094) internal successors, (6579), 4502 states have internal predecessors, (6579), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4504 states to 4504 states and 6584 transitions. [2022-01-10 01:04:52,961 INFO L78 Accepts]: Start accepts. Automaton has 4504 states and 6584 transitions. Word has length 61 [2022-01-10 01:04:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:52,961 INFO L470 AbstractCegarLoop]: Abstraction has 4504 states and 6584 transitions. [2022-01-10 01:04:52,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2022-01-10 01:04:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4504 states and 6584 transitions. [2022-01-10 01:04:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 01:04:52,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:52,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:52,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 01:04:52,963 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:52,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1072243498, now seen corresponding path program 1 times [2022-01-10 01:04:52,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:52,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251097832] [2022-01-10 01:04:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:52,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:52,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251097832] [2022-01-10 01:04:52,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251097832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:52,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:52,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:52,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791905745] [2022-01-10 01:04:52,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:52,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:52,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:52,982 INFO L87 Difference]: Start difference. First operand 4504 states and 6584 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2022-01-10 01:04:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:53,119 INFO L93 Difference]: Finished difference Result 9652 states and 14286 transitions. [2022-01-10 01:04:53,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:53,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 62 [2022-01-10 01:04:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:53,133 INFO L225 Difference]: With dead ends: 9652 [2022-01-10 01:04:53,133 INFO L226 Difference]: Without dead ends: 5171 [2022-01-10 01:04:53,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:53,137 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 305 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:53,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 994 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2022-01-10 01:04:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 3478. [2022-01-10 01:04:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3472 states have (on average 1.4818548387096775) internal successors, (5145), 3476 states have internal predecessors, (5145), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 5150 transitions. [2022-01-10 01:04:53,230 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 5150 transitions. Word has length 62 [2022-01-10 01:04:53,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:53,230 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 5150 transitions. [2022-01-10 01:04:53,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2022-01-10 01:04:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 5150 transitions. [2022-01-10 01:04:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 01:04:53,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:53,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:53,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 01:04:53,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1578233961, now seen corresponding path program 1 times [2022-01-10 01:04:53,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:53,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572539865] [2022-01-10 01:04:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:53,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:53,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:53,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572539865] [2022-01-10 01:04:53,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572539865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:53,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:53,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:04:53,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368079036] [2022-01-10 01:04:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:53,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:53,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:53,267 INFO L87 Difference]: Start difference. First operand 3478 states and 5150 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2022-01-10 01:04:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:53,974 INFO L93 Difference]: Finished difference Result 16552 states and 24345 transitions. [2022-01-10 01:04:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 01:04:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 64 [2022-01-10 01:04:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:54,006 INFO L225 Difference]: With dead ends: 16552 [2022-01-10 01:04:54,006 INFO L226 Difference]: Without dead ends: 13299 [2022-01-10 01:04:54,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-10 01:04:54,021 INFO L933 BasicCegarLoop]: 1066 mSDtfsCounter, 2095 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2095 SdHoareTripleChecker+Valid, 4007 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:54,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2095 Valid, 4007 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 01:04:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2022-01-10 01:04:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 4348. [2022-01-10 01:04:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4342 states have (on average 1.4755872869645326) internal successors, (6407), 4346 states have internal predecessors, (6407), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 6412 transitions. [2022-01-10 01:04:54,298 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 6412 transitions. Word has length 64 [2022-01-10 01:04:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:54,298 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 6412 transitions. [2022-01-10 01:04:54,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2022-01-10 01:04:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 6412 transitions. [2022-01-10 01:04:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 01:04:54,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:54,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:54,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 01:04:54,300 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2113614342, now seen corresponding path program 1 times [2022-01-10 01:04:54,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814075234] [2022-01-10 01:04:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:54,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:54,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814075234] [2022-01-10 01:04:54,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814075234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:54,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:54,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 01:04:54,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590380414] [2022-01-10 01:04:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:54,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 01:04:54,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 01:04:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:04:54,336 INFO L87 Difference]: Start difference. First operand 4348 states and 6412 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2022-01-10 01:04:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:55,532 INFO L93 Difference]: Finished difference Result 30121 states and 44183 transitions. [2022-01-10 01:04:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 01:04:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 65 [2022-01-10 01:04:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:55,581 INFO L225 Difference]: With dead ends: 30121 [2022-01-10 01:04:55,582 INFO L226 Difference]: Without dead ends: 25998 [2022-01-10 01:04:55,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-01-10 01:04:55,595 INFO L933 BasicCegarLoop]: 1869 mSDtfsCounter, 3797 mSDsluCounter, 6724 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3797 SdHoareTripleChecker+Valid, 8593 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:55,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3797 Valid, 8593 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:04:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25998 states. [2022-01-10 01:04:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25998 to 4658. [2022-01-10 01:04:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4652 states have (on average 1.4658211521926052) internal successors, (6819), 4656 states have internal predecessors, (6819), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 6824 transitions. [2022-01-10 01:04:55,931 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 6824 transitions. Word has length 65 [2022-01-10 01:04:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:55,931 INFO L470 AbstractCegarLoop]: Abstraction has 4658 states and 6824 transitions. [2022-01-10 01:04:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2022-01-10 01:04:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 6824 transitions. [2022-01-10 01:04:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 01:04:55,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:55,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 01:04:55,936 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash 142613235, now seen corresponding path program 1 times [2022-01-10 01:04:55,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247362464] [2022-01-10 01:04:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:55,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:55,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247362464] [2022-01-10 01:04:55,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247362464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:55,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:55,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:55,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735111653] [2022-01-10 01:04:55,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:55,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:55,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:55,961 INFO L87 Difference]: Start difference. First operand 4658 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-01-10 01:04:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:56,249 INFO L93 Difference]: Finished difference Result 9803 states and 14328 transitions. [2022-01-10 01:04:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 79 [2022-01-10 01:04:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:56,259 INFO L225 Difference]: With dead ends: 9803 [2022-01-10 01:04:56,259 INFO L226 Difference]: Without dead ends: 5166 [2022-01-10 01:04:56,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:56,265 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 131 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:56,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 810 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2022-01-10 01:04:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 5092. [2022-01-10 01:04:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 5086 states have (on average 1.4598898938261895) internal successors, (7425), 5090 states have internal predecessors, (7425), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 7430 transitions. [2022-01-10 01:04:56,522 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 7430 transitions. Word has length 79 [2022-01-10 01:04:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:56,522 INFO L470 AbstractCegarLoop]: Abstraction has 5092 states and 7430 transitions. [2022-01-10 01:04:56,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-01-10 01:04:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 7430 transitions. [2022-01-10 01:04:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 01:04:56,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:56,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:56,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 01:04:56,524 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1699220715, now seen corresponding path program 1 times [2022-01-10 01:04:56,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:56,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227832698] [2022-01-10 01:04:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:56,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:56,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:56,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227832698] [2022-01-10 01:04:56,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227832698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:56,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:56,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:04:56,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761713259] [2022-01-10 01:04:56,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:56,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:04:56,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:56,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:04:56,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:04:56,547 INFO L87 Difference]: Start difference. First operand 5092 states and 7430 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2022-01-10 01:04:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:57,034 INFO L93 Difference]: Finished difference Result 13610 states and 19696 transitions. [2022-01-10 01:04:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:04:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 91 [2022-01-10 01:04:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:57,049 INFO L225 Difference]: With dead ends: 13610 [2022-01-10 01:04:57,049 INFO L226 Difference]: Without dead ends: 8417 [2022-01-10 01:04:57,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:04:57,058 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 646 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:57,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 1252 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:04:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2022-01-10 01:04:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 7555. [2022-01-10 01:04:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7555 states, 7549 states have (on average 1.4323751490263612) internal successors, (10813), 7553 states have internal predecessors, (10813), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7555 states to 7555 states and 10818 transitions. [2022-01-10 01:04:57,398 INFO L78 Accepts]: Start accepts. Automaton has 7555 states and 10818 transitions. Word has length 91 [2022-01-10 01:04:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:57,401 INFO L470 AbstractCegarLoop]: Abstraction has 7555 states and 10818 transitions. [2022-01-10 01:04:57,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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) [2022-01-10 01:04:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7555 states and 10818 transitions. [2022-01-10 01:04:57,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 01:04:57,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:57,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:57,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 01:04:57,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:57,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:57,404 INFO L85 PathProgramCache]: Analyzing trace with hash -414205958, now seen corresponding path program 1 times [2022-01-10 01:04:57,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:57,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861773809] [2022-01-10 01:04:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:57,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:57,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861773809] [2022-01-10 01:04:57,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861773809] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:57,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:57,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:04:57,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907445675] [2022-01-10 01:04:57,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:57,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:57,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:57,436 INFO L87 Difference]: Start difference. First operand 7555 states and 10818 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-01-10 01:04:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:57,598 INFO L93 Difference]: Finished difference Result 10913 states and 15666 transitions. [2022-01-10 01:04:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:57,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 99 [2022-01-10 01:04:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:57,603 INFO L225 Difference]: With dead ends: 10913 [2022-01-10 01:04:57,603 INFO L226 Difference]: Without dead ends: 3361 [2022-01-10 01:04:57,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:04:57,612 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 335 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:57,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 517 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2022-01-10 01:04:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 3308. [2022-01-10 01:04:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3302 states have (on average 1.3452453058752272) internal successors, (4442), 3306 states have internal predecessors, (4442), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 4447 transitions. [2022-01-10 01:04:57,745 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 4447 transitions. Word has length 99 [2022-01-10 01:04:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:57,745 INFO L470 AbstractCegarLoop]: Abstraction has 3308 states and 4447 transitions. [2022-01-10 01:04:57,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2022-01-10 01:04:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 4447 transitions. [2022-01-10 01:04:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-10 01:04:57,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:57,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:57,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 01:04:57,747 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1527373171, now seen corresponding path program 1 times [2022-01-10 01:04:57,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:57,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005004154] [2022-01-10 01:04:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:57,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:57,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:57,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005004154] [2022-01-10 01:04:57,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005004154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:57,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:57,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:04:57,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593395691] [2022-01-10 01:04:57,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:57,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:04:57,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:57,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:04:57,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:04:57,804 INFO L87 Difference]: Start difference. First operand 3308 states and 4447 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2022-01-10 01:04:58,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:58,280 INFO L93 Difference]: Finished difference Result 12664 states and 17028 transitions. [2022-01-10 01:04:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:04:58,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 101 [2022-01-10 01:04:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:58,293 INFO L225 Difference]: With dead ends: 12664 [2022-01-10 01:04:58,294 INFO L226 Difference]: Without dead ends: 9533 [2022-01-10 01:04:58,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:04:58,302 INFO L933 BasicCegarLoop]: 1070 mSDtfsCounter, 1524 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:58,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 3360 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2022-01-10 01:04:58,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 3310. [2022-01-10 01:04:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3304 states have (on average 1.3432203389830508) internal successors, (4438), 3308 states have internal predecessors, (4438), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4443 transitions. [2022-01-10 01:04:58,604 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4443 transitions. Word has length 101 [2022-01-10 01:04:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:58,604 INFO L470 AbstractCegarLoop]: Abstraction has 3310 states and 4443 transitions. [2022-01-10 01:04:58,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2022-01-10 01:04:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4443 transitions. [2022-01-10 01:04:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 01:04:58,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:58,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:58,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 01:04:58,606 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash -653251672, now seen corresponding path program 1 times [2022-01-10 01:04:58,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:58,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299991398] [2022-01-10 01:04:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:58,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:58,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299991398] [2022-01-10 01:04:58,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299991398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:04:58,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361059013] [2022-01-10 01:04:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:58,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:04:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:04:58,653 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) [2022-01-10 01:04:58,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 01:04:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 01:04:58,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:04:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:04:59,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 01:04:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361059013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:59,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 01:04:59,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-10 01:04:59,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428331667] [2022-01-10 01:04:59,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:59,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:59,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:59,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:59,081 INFO L87 Difference]: Start difference. First operand 3310 states and 4443 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-01-10 01:04:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:59,428 INFO L93 Difference]: Finished difference Result 3945 states and 5288 transitions. [2022-01-10 01:04:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 103 [2022-01-10 01:04:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:59,456 INFO L225 Difference]: With dead ends: 3945 [2022-01-10 01:04:59,456 INFO L226 Difference]: Without dead ends: 3941 [2022-01-10 01:04:59,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:59,458 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 229 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:59,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 795 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2022-01-10 01:04:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3891. [2022-01-10 01:04:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3885 states have (on average 1.3397683397683398) internal successors, (5205), 3889 states have internal predecessors, (5205), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:04:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 5210 transitions. [2022-01-10 01:04:59,726 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 5210 transitions. Word has length 103 [2022-01-10 01:04:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:59,726 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 5210 transitions. [2022-01-10 01:04:59,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2022-01-10 01:04:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 5210 transitions. [2022-01-10 01:04:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 01:04:59,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:59,729 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:59,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 01:04:59,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-10 01:04:59,944 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash -182113054, now seen corresponding path program 1 times [2022-01-10 01:04:59,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:59,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644966162] [2022-01-10 01:04:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:59,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:59,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:59,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644966162] [2022-01-10 01:04:59,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644966162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:04:59,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181481930] [2022-01-10 01:04:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:59,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:04:59,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:04:59,984 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) [2022-01-10 01:05:00,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 01:05:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 01:05:00,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:05:00,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 01:05:00,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181481930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:00,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 01:05:00,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-10 01:05:00,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107667444] [2022-01-10 01:05:00,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:00,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:05:00,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:00,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:05:00,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:05:00,442 INFO L87 Difference]: Start difference. First operand 3891 states and 5210 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-01-10 01:05:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:00,656 INFO L93 Difference]: Finished difference Result 6926 states and 9320 transitions. [2022-01-10 01:05:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:05:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 157 [2022-01-10 01:05:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:00,660 INFO L225 Difference]: With dead ends: 6926 [2022-01-10 01:05:00,660 INFO L226 Difference]: Without dead ends: 3040 [2022-01-10 01:05:00,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:05:00,667 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 260 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:00,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 418 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:05:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2022-01-10 01:05:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2818. [2022-01-10 01:05:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2812 states have (on average 1.3182788051209104) internal successors, (3707), 2816 states have internal predecessors, (3707), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 3712 transitions. [2022-01-10 01:05:00,865 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 3712 transitions. Word has length 157 [2022-01-10 01:05:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:00,865 INFO L470 AbstractCegarLoop]: Abstraction has 2818 states and 3712 transitions. [2022-01-10 01:05:00,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-01-10 01:05:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 3712 transitions. [2022-01-10 01:05:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 01:05:00,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:00,867 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:00,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:01,080 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,SelfDestructingSolverStorable16 [2022-01-10 01:05:01,081 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1837024668, now seen corresponding path program 1 times [2022-01-10 01:05:01,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:01,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040365848] [2022-01-10 01:05:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:01,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:05:01,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:01,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040365848] [2022-01-10 01:05:01,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040365848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:01,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044500801] [2022-01-10 01:05:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:01,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:01,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:01,131 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) [2022-01-10 01:05:01,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 01:05:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:01,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 01:05:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 01:05:01,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 01:05:01,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044500801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:01,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 01:05:01,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-10 01:05:01,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210654246] [2022-01-10 01:05:01,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:01,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:05:01,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:05:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:05:01,424 INFO L87 Difference]: Start difference. First operand 2818 states and 3712 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2022-01-10 01:05:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:01,636 INFO L93 Difference]: Finished difference Result 5464 states and 7237 transitions. [2022-01-10 01:05:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:05:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 160 [2022-01-10 01:05:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:01,640 INFO L225 Difference]: With dead ends: 5464 [2022-01-10 01:05:01,641 INFO L226 Difference]: Without dead ends: 2818 [2022-01-10 01:05:01,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:05:01,644 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 270 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:01,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 390 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:05:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2022-01-10 01:05:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2818. [2022-01-10 01:05:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2812 states have (on average 1.2841394025604551) internal successors, (3611), 2816 states have internal predecessors, (3611), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 3616 transitions. [2022-01-10 01:05:01,816 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 3616 transitions. Word has length 160 [2022-01-10 01:05:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:01,817 INFO L470 AbstractCegarLoop]: Abstraction has 2818 states and 3616 transitions. [2022-01-10 01:05:01,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2022-01-10 01:05:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 3616 transitions. [2022-01-10 01:05:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 01:05:01,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:01,819 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:01,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:02,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-10 01:05:02,036 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash -321422549, now seen corresponding path program 1 times [2022-01-10 01:05:02,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516486908] [2022-01-10 01:05:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:02,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:05:02,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516486908] [2022-01-10 01:05:02,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516486908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141459620] [2022-01-10 01:05:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:02,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:02,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:02,087 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) [2022-01-10 01:05:02,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 01:05:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 01:05:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 01:05:02,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 01:05:02,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141459620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:02,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 01:05:02,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-10 01:05:02,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912519336] [2022-01-10 01:05:02,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:02,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:05:02,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:02,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:05:02,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:05:02,361 INFO L87 Difference]: Start difference. First operand 2818 states and 3616 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2022-01-10 01:05:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:02,744 INFO L93 Difference]: Finished difference Result 6367 states and 8330 transitions. [2022-01-10 01:05:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:05:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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 161 [2022-01-10 01:05:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:02,749 INFO L225 Difference]: With dead ends: 6367 [2022-01-10 01:05:02,749 INFO L226 Difference]: Without dead ends: 3721 [2022-01-10 01:05:02,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:05:02,751 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 201 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:02,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 654 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-01-10 01:05:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3633. [2022-01-10 01:05:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3627 states have (on average 1.2514474772539288) internal successors, (4539), 3631 states have internal predecessors, (4539), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 4544 transitions. [2022-01-10 01:05:02,942 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 4544 transitions. Word has length 161 [2022-01-10 01:05:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:02,943 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 4544 transitions. [2022-01-10 01:05:02,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2022-01-10 01:05:02,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 4544 transitions. [2022-01-10 01:05:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-10 01:05:02,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:02,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:02,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:03,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:03,161 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 920589941, now seen corresponding path program 1 times [2022-01-10 01:05:03,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:03,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860851198] [2022-01-10 01:05:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:03,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:05:03,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:03,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860851198] [2022-01-10 01:05:03,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860851198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:03,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931459276] [2022-01-10 01:05:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:03,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:03,276 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) [2022-01-10 01:05:03,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 01:05:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 01:05:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:05:03,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:05:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:05:04,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931459276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:05:04,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:05:04,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-10 01:05:04,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775611149] [2022-01-10 01:05:04,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:05:04,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 01:05:04,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 01:05:04,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 01:05:04,015 INFO L87 Difference]: Start difference. First operand 3633 states and 4544 transitions. Second operand has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 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) [2022-01-10 01:05:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:05,406 INFO L93 Difference]: Finished difference Result 19257 states and 24206 transitions. [2022-01-10 01:05:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 01:05:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 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 163 [2022-01-10 01:05:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:05,429 INFO L225 Difference]: With dead ends: 19257 [2022-01-10 01:05:05,429 INFO L226 Difference]: Without dead ends: 15796 [2022-01-10 01:05:05,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 01:05:05,442 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 5037 mSDsluCounter, 4816 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5037 SdHoareTripleChecker+Valid, 5675 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:05,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5037 Valid, 5675 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:05:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2022-01-10 01:05:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 5146. [2022-01-10 01:05:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5140 states have (on average 1.2560311284046692) internal successors, (6456), 5144 states have internal predecessors, (6456), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 6461 transitions. [2022-01-10 01:05:05,941 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 6461 transitions. Word has length 163 [2022-01-10 01:05:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:05,942 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 6461 transitions. [2022-01-10 01:05:05,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.2) internal successors, (162), 10 states have internal predecessors, (162), 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) [2022-01-10 01:05:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 6461 transitions. [2022-01-10 01:05:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 01:05:05,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:05,961 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:05,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:06,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:06,177 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:06,178 INFO L85 PathProgramCache]: Analyzing trace with hash -763703227, now seen corresponding path program 1 times [2022-01-10 01:05:06,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:06,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394697716] [2022-01-10 01:05:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:06,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 103 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 01:05:06,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:06,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394697716] [2022-01-10 01:05:06,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394697716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:06,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410951695] [2022-01-10 01:05:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:06,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:06,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:06,288 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) [2022-01-10 01:05:06,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 01:05:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 01:05:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 01:05:06,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 01:05:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410951695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:06,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 01:05:06,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2022-01-10 01:05:06,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563578684] [2022-01-10 01:05:06,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:06,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 01:05:06,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 01:05:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:05:06,857 INFO L87 Difference]: Start difference. First operand 5146 states and 6461 transitions. Second operand has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 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) [2022-01-10 01:05:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:07,474 INFO L93 Difference]: Finished difference Result 11313 states and 14214 transitions. [2022-01-10 01:05:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:05:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 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 263 [2022-01-10 01:05:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:07,483 INFO L225 Difference]: With dead ends: 11313 [2022-01-10 01:05:07,483 INFO L226 Difference]: Without dead ends: 6336 [2022-01-10 01:05:07,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-10 01:05:07,491 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 1387 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:07,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 2260 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2022-01-10 01:05:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5015. [2022-01-10 01:05:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5015 states, 5009 states have (on average 1.2537432621281692) internal successors, (6280), 5013 states have internal predecessors, (6280), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5015 states to 5015 states and 6285 transitions. [2022-01-10 01:05:07,882 INFO L78 Accepts]: Start accepts. Automaton has 5015 states and 6285 transitions. Word has length 263 [2022-01-10 01:05:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:07,882 INFO L470 AbstractCegarLoop]: Abstraction has 5015 states and 6285 transitions. [2022-01-10 01:05:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.714285714285715) internal successors, (257), 7 states have internal predecessors, (257), 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) [2022-01-10 01:05:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5015 states and 6285 transitions. [2022-01-10 01:05:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-10 01:05:07,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:07,885 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:07,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:08,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:08,103 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1019295115, now seen corresponding path program 1 times [2022-01-10 01:05:08,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:08,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077946660] [2022-01-10 01:05:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:08,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 01:05:08,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077946660] [2022-01-10 01:05:08,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077946660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:08,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:05:08,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:05:08,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957349464] [2022-01-10 01:05:08,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:08,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:05:08,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:08,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:05:08,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:05:08,202 INFO L87 Difference]: Start difference. First operand 5015 states and 6285 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-01-10 01:05:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:08,362 INFO L93 Difference]: Finished difference Result 5886 states and 7262 transitions. [2022-01-10 01:05:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:05:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 264 [2022-01-10 01:05:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:08,363 INFO L225 Difference]: With dead ends: 5886 [2022-01-10 01:05:08,363 INFO L226 Difference]: Without dead ends: 924 [2022-01-10 01:05:08,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:05:08,368 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 130 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:08,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 388 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-10 01:05:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 921. [2022-01-10 01:05:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 917 states have (on average 1.0828789531079608) internal successors, (993), 919 states have internal predecessors, (993), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 996 transitions. [2022-01-10 01:05:08,437 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 996 transitions. Word has length 264 [2022-01-10 01:05:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:08,437 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 996 transitions. [2022-01-10 01:05:08,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-01-10 01:05:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 996 transitions. [2022-01-10 01:05:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-10 01:05:08,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:08,439 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:08,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 01:05:08,439 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:08,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1686235295, now seen corresponding path program 1 times [2022-01-10 01:05:08,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:08,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108131050] [2022-01-10 01:05:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:08,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 01:05:08,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:08,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108131050] [2022-01-10 01:05:08,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108131050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:08,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:05:08,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 01:05:08,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002609535] [2022-01-10 01:05:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:08,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 01:05:08,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 01:05:08,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:05:08,493 INFO L87 Difference]: Start difference. First operand 921 states and 996 transitions. Second operand has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 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) [2022-01-10 01:05:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:08,717 INFO L93 Difference]: Finished difference Result 1898 states and 2058 transitions. [2022-01-10 01:05:08,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 01:05:08,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 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 265 [2022-01-10 01:05:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:08,720 INFO L225 Difference]: With dead ends: 1898 [2022-01-10 01:05:08,720 INFO L226 Difference]: Without dead ends: 1597 [2022-01-10 01:05:08,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-01-10 01:05:08,721 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 863 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2389 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:08,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 2389 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-01-10 01:05:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 919. [2022-01-10 01:05:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 915 states have (on average 1.0786885245901638) internal successors, (987), 917 states have internal predecessors, (987), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 990 transitions. [2022-01-10 01:05:08,795 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 990 transitions. Word has length 265 [2022-01-10 01:05:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:08,795 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 990 transitions. [2022-01-10 01:05:08,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 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) [2022-01-10 01:05:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 990 transitions. [2022-01-10 01:05:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-01-10 01:05:08,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:08,797 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:08,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-10 01:05:08,797 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -232946174, now seen corresponding path program 1 times [2022-01-10 01:05:08,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:08,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385335843] [2022-01-10 01:05:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:08,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 01:05:08,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:08,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385335843] [2022-01-10 01:05:08,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385335843] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:08,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:05:08,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:05:08,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426044665] [2022-01-10 01:05:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:08,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:05:08,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:08,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:05:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:05:08,838 INFO L87 Difference]: Start difference. First operand 919 states and 990 transitions. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 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) [2022-01-10 01:05:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:08,964 INFO L93 Difference]: Finished difference Result 1448 states and 1564 transitions. [2022-01-10 01:05:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 01:05:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 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 266 [2022-01-10 01:05:08,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:08,966 INFO L225 Difference]: With dead ends: 1448 [2022-01-10 01:05:08,966 INFO L226 Difference]: Without dead ends: 1145 [2022-01-10 01:05:08,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:05:08,967 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 428 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:08,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 913 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:05:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-01-10 01:05:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 902. [2022-01-10 01:05:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.0622914349276975) internal successors, (955), 900 states have internal predecessors, (955), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 957 transitions. [2022-01-10 01:05:09,057 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 957 transitions. Word has length 266 [2022-01-10 01:05:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:09,058 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 957 transitions. [2022-01-10 01:05:09,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 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) [2022-01-10 01:05:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 957 transitions. [2022-01-10 01:05:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-10 01:05:09,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:09,059 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:09,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-10 01:05:09,059 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1219154648, now seen corresponding path program 1 times [2022-01-10 01:05:09,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:09,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080410659] [2022-01-10 01:05:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:09,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 38 proven. 142 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 01:05:09,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:09,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080410659] [2022-01-10 01:05:09,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080410659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:09,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610452877] [2022-01-10 01:05:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:09,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:09,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:05:09,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 01:05:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 01:05:09,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 40 proven. 123 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 01:05:10,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:05:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 148 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 01:05:11,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610452877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:05:11,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:05:11,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2022-01-10 01:05:11,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880264577] [2022-01-10 01:05:11,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:05:11,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 01:05:11,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 01:05:11,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-01-10 01:05:11,143 INFO L87 Difference]: Start difference. First operand 902 states and 957 transitions. Second operand has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 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) [2022-01-10 01:05:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:11,847 INFO L93 Difference]: Finished difference Result 1224 states and 1303 transitions. [2022-01-10 01:05:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 01:05:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 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 325 [2022-01-10 01:05:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:11,853 INFO L225 Difference]: With dead ends: 1224 [2022-01-10 01:05:11,853 INFO L226 Difference]: Without dead ends: 1221 [2022-01-10 01:05:11,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 643 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=383, Invalid=2269, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 01:05:11,854 INFO L933 BasicCegarLoop]: 389 mSDtfsCounter, 2720 mSDsluCounter, 6589 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 6978 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:11,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2720 Valid, 6978 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:05:11,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-01-10 01:05:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 902. [2022-01-10 01:05:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.061179087875417) internal successors, (954), 900 states have internal predecessors, (954), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 956 transitions. [2022-01-10 01:05:11,936 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 956 transitions. Word has length 325 [2022-01-10 01:05:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:11,937 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 956 transitions. [2022-01-10 01:05:11,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.766666666666667) internal successors, (413), 30 states have internal predecessors, (413), 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) [2022-01-10 01:05:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 956 transitions. [2022-01-10 01:05:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-01-10 01:05:11,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:11,939 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:11,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:12,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:12,148 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash 200109303, now seen corresponding path program 1 times [2022-01-10 01:05:12,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:12,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802292592] [2022-01-10 01:05:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:12,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-01-10 01:05:12,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:12,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802292592] [2022-01-10 01:05:12,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802292592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:12,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129110996] [2022-01-10 01:05:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:12,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:12,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:12,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:05:12,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 01:05:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 01:05:12,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-01-10 01:05:12,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:05:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-01-10 01:05:13,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129110996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:05:13,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:05:13,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-01-10 01:05:13,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241693398] [2022-01-10 01:05:13,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:05:13,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 01:05:13,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 01:05:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-10 01:05:13,378 INFO L87 Difference]: Start difference. First operand 902 states and 956 transitions. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 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) [2022-01-10 01:05:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:13,675 INFO L93 Difference]: Finished difference Result 1252 states and 1331 transitions. [2022-01-10 01:05:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 01:05:13,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 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 372 [2022-01-10 01:05:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:13,676 INFO L225 Difference]: With dead ends: 1252 [2022-01-10 01:05:13,676 INFO L226 Difference]: Without dead ends: 1148 [2022-01-10 01:05:13,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 748 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-10 01:05:13,677 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 928 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:13,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 3196 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-01-10 01:05:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 901. [2022-01-10 01:05:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 899 states have (on average 1.0567296996662958) internal successors, (950), 899 states have internal predecessors, (950), 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) [2022-01-10 01:05:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 951 transitions. [2022-01-10 01:05:13,763 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 951 transitions. Word has length 372 [2022-01-10 01:05:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:13,763 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 951 transitions. [2022-01-10 01:05:13,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 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) [2022-01-10 01:05:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 951 transitions. [2022-01-10 01:05:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-01-10 01:05:13,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:13,765 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:05:13,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:13,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-10 01:05:13,984 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2022630306, now seen corresponding path program 1 times [2022-01-10 01:05:13,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:13,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553349047] [2022-01-10 01:05:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:13,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 73 proven. 357 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 01:05:14,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:14,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553349047] [2022-01-10 01:05:14,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553349047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:14,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85517942] [2022-01-10 01:05:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:14,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:14,362 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:05:14,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 01:05:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:14,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-10 01:05:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 91 proven. 339 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 01:05:15,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:05:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 20 proven. 410 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 01:05:16,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85517942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:05:16,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:05:16,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 35 [2022-01-10 01:05:16,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266587026] [2022-01-10 01:05:16,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:05:16,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 01:05:16,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 01:05:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 01:05:16,677 INFO L87 Difference]: Start difference. First operand 901 states and 951 transitions. Second operand has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 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) [2022-01-10 01:05:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:17,692 INFO L93 Difference]: Finished difference Result 1148 states and 1216 transitions. [2022-01-10 01:05:17,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-10 01:05:17,693 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 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 433 [2022-01-10 01:05:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:17,694 INFO L225 Difference]: With dead ends: 1148 [2022-01-10 01:05:17,694 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 01:05:17,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 866 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=4145, Unknown=0, NotChecked=0, Total=4692 [2022-01-10 01:05:17,696 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 3108 mSDsluCounter, 11297 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3108 SdHoareTripleChecker+Valid, 11852 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:17,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3108 Valid, 11852 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 01:05:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 01:05:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 01:05:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:05:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 01:05:17,697 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 433 [2022-01-10 01:05:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:17,697 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 01:05:17,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 18.914285714285715) internal successors, (662), 35 states have internal predecessors, (662), 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) [2022-01-10 01:05:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 01:05:17,697 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 01:05:17,700 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 01:05:17,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 01:05:17,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-10 01:05:17,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.