/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 05:40:01,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 05:40:01,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 05:40:01,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 05:40:01,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 05:40:01,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 05:40:01,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 05:40:01,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 05:40:01,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 05:40:01,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 05:40:01,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 05:40:01,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 05:40:01,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 05:40:01,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 05:40:01,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 05:40:01,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 05:40:01,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 05:40:01,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 05:40:01,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 05:40:01,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 05:40:01,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:40:01,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 05:40:01,720 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 05:40:01,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 05:40:01,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 05:40:01,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 05:40:01,956 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 05:40:01,956 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 05:40:01,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-18 05:40:01,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269c6e268/90cee820a1664dfc889505c0a616033d/FLAG78f3e6809 [2022-03-18 05:40:02,363 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 05:40:02,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c [2022-03-18 05:40:02,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269c6e268/90cee820a1664dfc889505c0a616033d/FLAG78f3e6809 [2022-03-18 05:40:02,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269c6e268/90cee820a1664dfc889505c0a616033d [2022-03-18 05:40:02,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 05:40:02,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 05:40:02,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 05:40:02,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 05:40:02,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 05:40:02,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac5bcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02, skipping insertion in model container [2022-03-18 05:40:02,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 05:40:02,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 05:40:02,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c[5628,5641] [2022-03-18 05:40:02,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:40:02,532 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 05:40:02,552 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-2.c[5628,5641] [2022-03-18 05:40:02,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:40:02,562 INFO L208 MainTranslator]: Completed translation [2022-03-18 05:40:02,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02 WrapperNode [2022-03-18 05:40:02,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 05:40:02,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 05:40:02,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 05:40:02,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 05:40:02,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 05:40:02,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 05:40:02,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 05:40:02,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 05:40:02,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (1/1) ... [2022-03-18 05:40:02,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:40:02,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:40:02,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 05:40:02,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 05:40:02,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 05:40:02,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 05:40:02,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 05:40:02,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 05:40:02,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 05:40:02,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 05:40:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 05:40:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 05:40:02,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 05:40:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 05:40:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 05:40:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 05:40:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 05:40:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 05:40:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 05:40:02,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 05:40:02,733 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 05:40:02,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 05:40:02,934 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 05:40:02,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 05:40:02,938 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 05:40:02,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:40:02 BoogieIcfgContainer [2022-03-18 05:40:02,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 05:40:02,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 05:40:02,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 05:40:02,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 05:40:02,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:40:02" (1/3) ... [2022-03-18 05:40:02,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231f6a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:40:02, skipping insertion in model container [2022-03-18 05:40:02,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:40:02" (2/3) ... [2022-03-18 05:40:02,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231f6a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:40:02, skipping insertion in model container [2022-03-18 05:40:02,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:40:02" (3/3) ... [2022-03-18 05:40:02,960 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2022-03-18 05:40:02,964 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 05:40:02,964 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 05:40:03,007 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 05:40:03,011 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 05:40:03,011 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 05:40:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 05:40:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 05:40:03,041 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:03,042 INFO L500 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] [2022-03-18 05:40:03,042 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:03,045 INFO L85 PathProgramCache]: Analyzing trace with hash 208658311, now seen corresponding path program 1 times [2022-03-18 05:40:03,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376030471] [2022-03-18 05:40:03,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash 208658311, now seen corresponding path program 2 times [2022-03-18 05:40:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206048310] [2022-03-18 05:40:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:03,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:03,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206048310] [2022-03-18 05:40:03,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206048310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:03,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:03,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:03,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376030471] [2022-03-18 05:40:03,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376030471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:03,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:03,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669131543] [2022-03-18 05:40:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:03,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:03,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:03,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:03,331 INFO L87 Difference]: Start difference. First operand has 60 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 55 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:03,500 INFO L93 Difference]: Finished difference Result 118 states and 211 transitions. [2022-03-18 05:40:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 05:40:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:03,512 INFO L225 Difference]: With dead ends: 118 [2022-03-18 05:40:03,512 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 05:40:03,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:03,521 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 259 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:03,523 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 119 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 05:40:03,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 71. [2022-03-18 05:40:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 67 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-03-18 05:40:03,594 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 26 [2022-03-18 05:40:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:03,594 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-03-18 05:40:03,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-03-18 05:40:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 05:40:03,597 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:03,597 INFO L500 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] [2022-03-18 05:40:03,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 05:40:03,598 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:03,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:03,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1785486395, now seen corresponding path program 1 times [2022-03-18 05:40:03,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:03,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1825438415] [2022-03-18 05:40:03,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:03,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1785486395, now seen corresponding path program 2 times [2022-03-18 05:40:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:03,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587695311] [2022-03-18 05:40:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:03,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:03,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:03,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587695311] [2022-03-18 05:40:03,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587695311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:03,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:03,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:03,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1825438415] [2022-03-18 05:40:03,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1825438415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:03,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:03,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:03,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941705630] [2022-03-18 05:40:03,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:03,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:03,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:03,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:03,706 INFO L87 Difference]: Start difference. First operand 71 states and 130 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:03,857 INFO L93 Difference]: Finished difference Result 168 states and 313 transitions. [2022-03-18 05:40:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:03,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-18 05:40:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:03,860 INFO L225 Difference]: With dead ends: 168 [2022-03-18 05:40:03,860 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 05:40:03,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:03,862 INFO L912 BasicCegarLoop]: 128 mSDtfsCounter, 223 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:03,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 135 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 05:40:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-03-18 05:40:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.8865979381443299) internal successors, (183), 97 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 186 transitions. [2022-03-18 05:40:03,876 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 186 transitions. Word has length 26 [2022-03-18 05:40:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:03,876 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 186 transitions. [2022-03-18 05:40:03,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 186 transitions. [2022-03-18 05:40:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 05:40:03,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:03,880 INFO L500 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] [2022-03-18 05:40:03,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 05:40:03,880 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2121315188, now seen corresponding path program 1 times [2022-03-18 05:40:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:03,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693728817] [2022-03-18 05:40:03,885 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:03,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2121315188, now seen corresponding path program 2 times [2022-03-18 05:40:03,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:03,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251643864] [2022-03-18 05:40:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:03,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:03,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:03,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251643864] [2022-03-18 05:40:03,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251643864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:03,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:03,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:03,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:03,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693728817] [2022-03-18 05:40:03,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693728817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:03,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:03,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:03,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808521672] [2022-03-18 05:40:03,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:03,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:03,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:03,929 INFO L87 Difference]: Start difference. First operand 101 states and 186 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:04,036 INFO L93 Difference]: Finished difference Result 154 states and 280 transitions. [2022-03-18 05:40:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:04,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 05:40:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:04,038 INFO L225 Difference]: With dead ends: 154 [2022-03-18 05:40:04,038 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 05:40:04,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:04,040 INFO L912 BasicCegarLoop]: 156 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:04,041 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 163 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:04,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 05:40:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-03-18 05:40:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.85) internal successors, (185), 100 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 188 transitions. [2022-03-18 05:40:04,061 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 188 transitions. Word has length 27 [2022-03-18 05:40:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:04,062 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 188 transitions. [2022-03-18 05:40:04,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 188 transitions. [2022-03-18 05:40:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 05:40:04,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:04,063 INFO L500 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] [2022-03-18 05:40:04,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 05:40:04,065 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:04,065 INFO L85 PathProgramCache]: Analyzing trace with hash 484708366, now seen corresponding path program 1 times [2022-03-18 05:40:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265646971] [2022-03-18 05:40:04,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash 484708366, now seen corresponding path program 2 times [2022-03-18 05:40:04,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:04,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308982676] [2022-03-18 05:40:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:04,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:04,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:04,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308982676] [2022-03-18 05:40:04,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308982676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:04,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265646971] [2022-03-18 05:40:04,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265646971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232981596] [2022-03-18 05:40:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:04,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:04,103 INFO L87 Difference]: Start difference. First operand 104 states and 188 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:04,202 INFO L93 Difference]: Finished difference Result 292 states and 540 transitions. [2022-03-18 05:40:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 05:40:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:04,203 INFO L225 Difference]: With dead ends: 292 [2022-03-18 05:40:04,203 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 05:40:04,205 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:04,206 INFO L912 BasicCegarLoop]: 102 mSDtfsCounter, 248 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:04,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 109 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 05:40:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-03-18 05:40:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8534031413612566) internal successors, (354), 191 states have internal predecessors, (354), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 357 transitions. [2022-03-18 05:40:04,230 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 357 transitions. Word has length 27 [2022-03-18 05:40:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:04,231 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 357 transitions. [2022-03-18 05:40:04,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 357 transitions. [2022-03-18 05:40:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 05:40:04,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:04,235 INFO L500 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] [2022-03-18 05:40:04,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 05:40:04,235 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1816114224, now seen corresponding path program 1 times [2022-03-18 05:40:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [979787681] [2022-03-18 05:40:04,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1816114224, now seen corresponding path program 2 times [2022-03-18 05:40:04,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986474935] [2022-03-18 05:40:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:04,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986474935] [2022-03-18 05:40:04,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986474935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [979787681] [2022-03-18 05:40:04,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [979787681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457695081] [2022-03-18 05:40:04,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:04,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:04,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:04,309 INFO L87 Difference]: Start difference. First operand 195 states and 357 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:04,393 INFO L93 Difference]: Finished difference Result 255 states and 467 transitions. [2022-03-18 05:40:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:04,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 05:40:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:04,394 INFO L225 Difference]: With dead ends: 255 [2022-03-18 05:40:04,394 INFO L226 Difference]: Without dead ends: 253 [2022-03-18 05:40:04,395 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:04,395 INFO L912 BasicCegarLoop]: 181 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:04,395 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 188 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:04,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-18 05:40:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 195. [2022-03-18 05:40:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.8429319371727748) internal successors, (352), 191 states have internal predecessors, (352), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 355 transitions. [2022-03-18 05:40:04,407 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 355 transitions. Word has length 27 [2022-03-18 05:40:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:04,407 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 355 transitions. [2022-03-18 05:40:04,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 355 transitions. [2022-03-18 05:40:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 05:40:04,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:04,409 INFO L500 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] [2022-03-18 05:40:04,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 05:40:04,410 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2141269562, now seen corresponding path program 1 times [2022-03-18 05:40:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808705840] [2022-03-18 05:40:04,410 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:04,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2141269562, now seen corresponding path program 2 times [2022-03-18 05:40:04,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:04,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150204442] [2022-03-18 05:40:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:04,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:04,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150204442] [2022-03-18 05:40:04,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150204442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808705840] [2022-03-18 05:40:04,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808705840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090662548] [2022-03-18 05:40:04,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:04,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:04,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:04,439 INFO L87 Difference]: Start difference. First operand 195 states and 355 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:04,602 INFO L93 Difference]: Finished difference Result 371 states and 683 transitions. [2022-03-18 05:40:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:04,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-18 05:40:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:04,603 INFO L225 Difference]: With dead ends: 371 [2022-03-18 05:40:04,603 INFO L226 Difference]: Without dead ends: 369 [2022-03-18 05:40:04,604 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:04,604 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 239 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:04,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 106 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-18 05:40:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 263. [2022-03-18 05:40:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.83011583011583) internal successors, (474), 259 states have internal predecessors, (474), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 477 transitions. [2022-03-18 05:40:04,634 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 477 transitions. Word has length 28 [2022-03-18 05:40:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:04,634 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 477 transitions. [2022-03-18 05:40:04,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 477 transitions. [2022-03-18 05:40:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 05:40:04,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:04,635 INFO L500 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] [2022-03-18 05:40:04,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 05:40:04,635 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:04,635 INFO L85 PathProgramCache]: Analyzing trace with hash 147124856, now seen corresponding path program 1 times [2022-03-18 05:40:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1997222761] [2022-03-18 05:40:04,636 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash 147124856, now seen corresponding path program 2 times [2022-03-18 05:40:04,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:04,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589788894] [2022-03-18 05:40:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:04,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:04,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589788894] [2022-03-18 05:40:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589788894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1997222761] [2022-03-18 05:40:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1997222761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765629258] [2022-03-18 05:40:04,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:04,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:04,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:04,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:04,670 INFO L87 Difference]: Start difference. First operand 263 states and 477 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:04,765 INFO L93 Difference]: Finished difference Result 631 states and 1155 transitions. [2022-03-18 05:40:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-18 05:40:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:04,767 INFO L225 Difference]: With dead ends: 631 [2022-03-18 05:40:04,767 INFO L226 Difference]: Without dead ends: 377 [2022-03-18 05:40:04,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:04,770 INFO L912 BasicCegarLoop]: 132 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:04,770 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-18 05:40:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-03-18 05:40:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 371 states have (on average 1.8221024258760108) internal successors, (676), 371 states have internal predecessors, (676), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 679 transitions. [2022-03-18 05:40:04,793 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 679 transitions. Word has length 28 [2022-03-18 05:40:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:04,793 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 679 transitions. [2022-03-18 05:40:04,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 679 transitions. [2022-03-18 05:40:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 05:40:04,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:04,796 INFO L500 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] [2022-03-18 05:40:04,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 05:40:04,796 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1955059427, now seen corresponding path program 1 times [2022-03-18 05:40:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725990941] [2022-03-18 05:40:04,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1955059427, now seen corresponding path program 2 times [2022-03-18 05:40:04,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:04,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678304631] [2022-03-18 05:40:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:04,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:04,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:04,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678304631] [2022-03-18 05:40:04,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678304631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:04,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725990941] [2022-03-18 05:40:04,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725990941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:04,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:04,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:04,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785852000] [2022-03-18 05:40:04,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:04,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:04,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:04,831 INFO L87 Difference]: Start difference. First operand 375 states and 679 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:04,923 INFO L93 Difference]: Finished difference Result 565 states and 1021 transitions. [2022-03-18 05:40:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 05:40:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:04,925 INFO L225 Difference]: With dead ends: 565 [2022-03-18 05:40:04,925 INFO L226 Difference]: Without dead ends: 383 [2022-03-18 05:40:04,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:04,927 INFO L912 BasicCegarLoop]: 150 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:04,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 157 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-03-18 05:40:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2022-03-18 05:40:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 377 states have (on average 1.8037135278514589) internal successors, (680), 377 states have internal predecessors, (680), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 683 transitions. [2022-03-18 05:40:04,955 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 683 transitions. Word has length 29 [2022-03-18 05:40:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:04,957 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 683 transitions. [2022-03-18 05:40:04,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 683 transitions. [2022-03-18 05:40:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 05:40:04,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:04,957 INFO L500 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] [2022-03-18 05:40:04,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 05:40:04,957 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:04,958 INFO L85 PathProgramCache]: Analyzing trace with hash 266115685, now seen corresponding path program 1 times [2022-03-18 05:40:04,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:04,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247229112] [2022-03-18 05:40:04,958 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:04,958 INFO L85 PathProgramCache]: Analyzing trace with hash 266115685, now seen corresponding path program 2 times [2022-03-18 05:40:04,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:04,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267097218] [2022-03-18 05:40:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:04,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:04,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267097218] [2022-03-18 05:40:05,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267097218] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247229112] [2022-03-18 05:40:05,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247229112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792456405] [2022-03-18 05:40:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:05,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:05,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:05,006 INFO L87 Difference]: Start difference. First operand 381 states and 683 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:05,122 INFO L93 Difference]: Finished difference Result 717 states and 1301 transitions. [2022-03-18 05:40:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 05:40:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:05,125 INFO L225 Difference]: With dead ends: 717 [2022-03-18 05:40:05,125 INFO L226 Difference]: Without dead ends: 715 [2022-03-18 05:40:05,126 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:05,127 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 232 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:05,127 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 105 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-03-18 05:40:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 521. [2022-03-18 05:40:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 517 states have (on average 1.7794970986460348) internal successors, (920), 517 states have internal predecessors, (920), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 923 transitions. [2022-03-18 05:40:05,155 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 923 transitions. Word has length 29 [2022-03-18 05:40:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:05,156 INFO L478 AbstractCegarLoop]: Abstraction has 521 states and 923 transitions. [2022-03-18 05:40:05,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 923 transitions. [2022-03-18 05:40:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 05:40:05,157 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:05,157 INFO L500 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] [2022-03-18 05:40:05,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 05:40:05,157 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1728029021, now seen corresponding path program 1 times [2022-03-18 05:40:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1340512411] [2022-03-18 05:40:05,158 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1728029021, now seen corresponding path program 2 times [2022-03-18 05:40:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:05,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573188712] [2022-03-18 05:40:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:05,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573188712] [2022-03-18 05:40:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573188712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1340512411] [2022-03-18 05:40:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1340512411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126289408] [2022-03-18 05:40:05,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:05,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:05,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:05,185 INFO L87 Difference]: Start difference. First operand 521 states and 923 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:05,291 INFO L93 Difference]: Finished difference Result 1245 states and 2221 transitions. [2022-03-18 05:40:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 05:40:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:05,293 INFO L225 Difference]: With dead ends: 1245 [2022-03-18 05:40:05,293 INFO L226 Difference]: Without dead ends: 739 [2022-03-18 05:40:05,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:05,294 INFO L912 BasicCegarLoop]: 134 mSDtfsCounter, 205 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:05,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 141 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-18 05:40:05,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2022-03-18 05:40:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 733 states have (on average 1.7735334242837653) internal successors, (1300), 733 states have internal predecessors, (1300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1303 transitions. [2022-03-18 05:40:05,347 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1303 transitions. Word has length 29 [2022-03-18 05:40:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:05,348 INFO L478 AbstractCegarLoop]: Abstraction has 737 states and 1303 transitions. [2022-03-18 05:40:05,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1303 transitions. [2022-03-18 05:40:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 05:40:05,348 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:05,348 INFO L500 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] [2022-03-18 05:40:05,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 05:40:05,349 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:05,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:05,349 INFO L85 PathProgramCache]: Analyzing trace with hash -340135571, now seen corresponding path program 1 times [2022-03-18 05:40:05,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243918843] [2022-03-18 05:40:05,349 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:05,349 INFO L85 PathProgramCache]: Analyzing trace with hash -340135571, now seen corresponding path program 2 times [2022-03-18 05:40:05,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:05,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750117569] [2022-03-18 05:40:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:05,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:05,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:05,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750117569] [2022-03-18 05:40:05,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750117569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:05,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243918843] [2022-03-18 05:40:05,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243918843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455939714] [2022-03-18 05:40:05,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:05,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:05,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:05,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:05,371 INFO L87 Difference]: Start difference. First operand 737 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:05,476 INFO L93 Difference]: Finished difference Result 1105 states and 1949 transitions. [2022-03-18 05:40:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 05:40:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:05,479 INFO L225 Difference]: With dead ends: 1105 [2022-03-18 05:40:05,479 INFO L226 Difference]: Without dead ends: 747 [2022-03-18 05:40:05,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:05,480 INFO L912 BasicCegarLoop]: 147 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:05,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 154 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-18 05:40:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 745. [2022-03-18 05:40:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 741 states have (on average 1.7543859649122806) internal successors, (1300), 741 states have internal predecessors, (1300), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1303 transitions. [2022-03-18 05:40:05,519 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1303 transitions. Word has length 30 [2022-03-18 05:40:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:05,519 INFO L478 AbstractCegarLoop]: Abstraction has 745 states and 1303 transitions. [2022-03-18 05:40:05,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1303 transitions. [2022-03-18 05:40:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 05:40:05,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:05,520 INFO L500 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] [2022-03-18 05:40:05,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 05:40:05,520 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:05,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:05,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2029079313, now seen corresponding path program 1 times [2022-03-18 05:40:05,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387095571] [2022-03-18 05:40:05,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2029079313, now seen corresponding path program 2 times [2022-03-18 05:40:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:05,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257079261] [2022-03-18 05:40:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:05,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:05,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257079261] [2022-03-18 05:40:05,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257079261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:05,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387095571] [2022-03-18 05:40:05,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387095571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663491966] [2022-03-18 05:40:05,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:05,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:05,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:05,541 INFO L87 Difference]: Start difference. First operand 745 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:05,706 INFO L93 Difference]: Finished difference Result 1389 states and 2465 transitions. [2022-03-18 05:40:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 05:40:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:05,711 INFO L225 Difference]: With dead ends: 1389 [2022-03-18 05:40:05,711 INFO L226 Difference]: Without dead ends: 1387 [2022-03-18 05:40:05,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:05,711 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 225 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:05,712 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 104 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-18 05:40:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1033. [2022-03-18 05:40:05,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1029 states have (on average 1.7220602526724975) internal successors, (1772), 1029 states have internal predecessors, (1772), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1775 transitions. [2022-03-18 05:40:05,769 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1775 transitions. Word has length 30 [2022-03-18 05:40:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:05,770 INFO L478 AbstractCegarLoop]: Abstraction has 1033 states and 1775 transitions. [2022-03-18 05:40:05,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1775 transitions. [2022-03-18 05:40:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 05:40:05,771 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:05,771 INFO L500 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] [2022-03-18 05:40:05,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 05:40:05,771 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:05,771 INFO L85 PathProgramCache]: Analyzing trace with hash 271743277, now seen corresponding path program 1 times [2022-03-18 05:40:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1837331501] [2022-03-18 05:40:05,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 271743277, now seen corresponding path program 2 times [2022-03-18 05:40:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:05,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171158367] [2022-03-18 05:40:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:05,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:05,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171158367] [2022-03-18 05:40:05,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171158367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:05,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1837331501] [2022-03-18 05:40:05,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1837331501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:05,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:05,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:05,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19082124] [2022-03-18 05:40:05,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:05,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:05,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:05,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:05,791 INFO L87 Difference]: Start difference. First operand 1033 states and 1775 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:05,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:05,949 INFO L93 Difference]: Finished difference Result 2461 states and 4257 transitions. [2022-03-18 05:40:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:05,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-18 05:40:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:05,953 INFO L225 Difference]: With dead ends: 2461 [2022-03-18 05:40:05,954 INFO L226 Difference]: Without dead ends: 1451 [2022-03-18 05:40:05,955 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:05,955 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 199 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:05,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 143 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:05,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-03-18 05:40:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1449. [2022-03-18 05:40:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1445 states have (on average 1.719031141868512) internal successors, (2484), 1445 states have internal predecessors, (2484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2487 transitions. [2022-03-18 05:40:06,043 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2487 transitions. Word has length 30 [2022-03-18 05:40:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:06,044 INFO L478 AbstractCegarLoop]: Abstraction has 1449 states and 2487 transitions. [2022-03-18 05:40:06,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2487 transitions. [2022-03-18 05:40:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 05:40:06,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:06,045 INFO L500 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] [2022-03-18 05:40:06,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 05:40:06,045 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1523263864, now seen corresponding path program 1 times [2022-03-18 05:40:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182387933] [2022-03-18 05:40:06,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1523263864, now seen corresponding path program 2 times [2022-03-18 05:40:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437355116] [2022-03-18 05:40:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:06,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:06,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:06,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437355116] [2022-03-18 05:40:06,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437355116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:06,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:06,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:06,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:06,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182387933] [2022-03-18 05:40:06,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182387933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:06,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:06,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788870318] [2022-03-18 05:40:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:06,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:06,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:06,070 INFO L87 Difference]: Start difference. First operand 1449 states and 2487 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:06,239 INFO L93 Difference]: Finished difference Result 2173 states and 3721 transitions. [2022-03-18 05:40:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 05:40:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:06,244 INFO L225 Difference]: With dead ends: 2173 [2022-03-18 05:40:06,244 INFO L226 Difference]: Without dead ends: 1467 [2022-03-18 05:40:06,245 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:06,245 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:06,246 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 151 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-18 05:40:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1465. [2022-03-18 05:40:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1461 states have (on average 1.700205338809035) internal successors, (2484), 1461 states have internal predecessors, (2484), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2487 transitions. [2022-03-18 05:40:06,342 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2487 transitions. Word has length 31 [2022-03-18 05:40:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:06,342 INFO L478 AbstractCegarLoop]: Abstraction has 1465 states and 2487 transitions. [2022-03-18 05:40:06,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2487 transitions. [2022-03-18 05:40:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 05:40:06,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:06,343 INFO L500 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] [2022-03-18 05:40:06,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 05:40:06,343 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash -165679878, now seen corresponding path program 1 times [2022-03-18 05:40:06,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:06,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11124249] [2022-03-18 05:40:06,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash -165679878, now seen corresponding path program 2 times [2022-03-18 05:40:06,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:06,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172672858] [2022-03-18 05:40:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:06,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:06,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:06,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172672858] [2022-03-18 05:40:06,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172672858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:06,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:06,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:06,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:06,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11124249] [2022-03-18 05:40:06,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11124249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:06,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:06,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:06,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162443817] [2022-03-18 05:40:06,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:06,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:06,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:06,367 INFO L87 Difference]: Start difference. First operand 1465 states and 2487 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:06,587 INFO L93 Difference]: Finished difference Result 2701 states and 4665 transitions. [2022-03-18 05:40:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:06,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 05:40:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:06,594 INFO L225 Difference]: With dead ends: 2701 [2022-03-18 05:40:06,594 INFO L226 Difference]: Without dead ends: 2699 [2022-03-18 05:40:06,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:06,595 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 218 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:06,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 103 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-18 05:40:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2057. [2022-03-18 05:40:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2053 states have (on average 1.6619581100828056) internal successors, (3412), 2053 states have internal predecessors, (3412), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3415 transitions. [2022-03-18 05:40:06,732 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3415 transitions. Word has length 31 [2022-03-18 05:40:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:06,733 INFO L478 AbstractCegarLoop]: Abstraction has 2057 states and 3415 transitions. [2022-03-18 05:40:06,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3415 transitions. [2022-03-18 05:40:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 05:40:06,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:06,735 INFO L500 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] [2022-03-18 05:40:06,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 05:40:06,735 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2135142712, now seen corresponding path program 1 times [2022-03-18 05:40:06,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:06,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175954501] [2022-03-18 05:40:06,735 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:06,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2135142712, now seen corresponding path program 2 times [2022-03-18 05:40:06,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:06,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772867598] [2022-03-18 05:40:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:06,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:06,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:06,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:06,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772867598] [2022-03-18 05:40:06,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772867598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:06,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:06,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:06,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:06,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175954501] [2022-03-18 05:40:06,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175954501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:06,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:06,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:06,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810246724] [2022-03-18 05:40:06,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:06,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:06,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:06,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:06,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:06,761 INFO L87 Difference]: Start difference. First operand 2057 states and 3415 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:07,003 INFO L93 Difference]: Finished difference Result 4877 states and 8153 transitions. [2022-03-18 05:40:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 05:40:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:07,012 INFO L225 Difference]: With dead ends: 4877 [2022-03-18 05:40:07,012 INFO L226 Difference]: Without dead ends: 2859 [2022-03-18 05:40:07,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:07,016 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:07,016 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 145 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-03-18 05:40:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2857. [2022-03-18 05:40:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2853 states have (on average 1.6614090431125133) internal successors, (4740), 2853 states have internal predecessors, (4740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4743 transitions. [2022-03-18 05:40:07,208 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4743 transitions. Word has length 31 [2022-03-18 05:40:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:07,209 INFO L478 AbstractCegarLoop]: Abstraction has 2857 states and 4743 transitions. [2022-03-18 05:40:07,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4743 transitions. [2022-03-18 05:40:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 05:40:07,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:07,211 INFO L500 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] [2022-03-18 05:40:07,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 05:40:07,211 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash -840895454, now seen corresponding path program 1 times [2022-03-18 05:40:07,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:07,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25625649] [2022-03-18 05:40:07,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash -840895454, now seen corresponding path program 2 times [2022-03-18 05:40:07,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:07,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90800179] [2022-03-18 05:40:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:07,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:07,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:07,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90800179] [2022-03-18 05:40:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90800179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:07,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:07,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25625649] [2022-03-18 05:40:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25625649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:07,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652826881] [2022-03-18 05:40:07,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:07,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:07,229 INFO L87 Difference]: Start difference. First operand 2857 states and 4743 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:07,462 INFO L93 Difference]: Finished difference Result 4285 states and 7097 transitions. [2022-03-18 05:40:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:07,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-18 05:40:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:07,470 INFO L225 Difference]: With dead ends: 4285 [2022-03-18 05:40:07,470 INFO L226 Difference]: Without dead ends: 2891 [2022-03-18 05:40:07,472 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:07,472 INFO L912 BasicCegarLoop]: 141 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:07,473 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2891 states. [2022-03-18 05:40:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2891 to 2889. [2022-03-18 05:40:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2885 states have (on average 1.6429809358752165) internal successors, (4740), 2885 states have internal predecessors, (4740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:07,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4743 transitions. [2022-03-18 05:40:07,685 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4743 transitions. Word has length 32 [2022-03-18 05:40:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:07,685 INFO L478 AbstractCegarLoop]: Abstraction has 2889 states and 4743 transitions. [2022-03-18 05:40:07,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4743 transitions. [2022-03-18 05:40:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 05:40:07,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:07,687 INFO L500 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] [2022-03-18 05:40:07,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 05:40:07,687 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:07,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1765128100, now seen corresponding path program 1 times [2022-03-18 05:40:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [212092026] [2022-03-18 05:40:07,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1765128100, now seen corresponding path program 2 times [2022-03-18 05:40:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:07,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689359824] [2022-03-18 05:40:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:07,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:07,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:07,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:07,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689359824] [2022-03-18 05:40:07,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689359824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:07,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:07,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:07,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:07,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [212092026] [2022-03-18 05:40:07,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [212092026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:07,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:07,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:07,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845240055] [2022-03-18 05:40:07,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:07,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:07,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:07,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:07,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:07,706 INFO L87 Difference]: Start difference. First operand 2889 states and 4743 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:08,116 INFO L93 Difference]: Finished difference Result 5261 states and 8809 transitions. [2022-03-18 05:40:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:08,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-18 05:40:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:08,129 INFO L225 Difference]: With dead ends: 5261 [2022-03-18 05:40:08,129 INFO L226 Difference]: Without dead ends: 5259 [2022-03-18 05:40:08,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:08,130 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 211 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:08,130 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 102 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-18 05:40:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 4105. [2022-03-18 05:40:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.6005852231163131) internal successors, (6564), 4101 states have internal predecessors, (6564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 6567 transitions. [2022-03-18 05:40:08,407 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 6567 transitions. Word has length 32 [2022-03-18 05:40:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:08,407 INFO L478 AbstractCegarLoop]: Abstraction has 4105 states and 6567 transitions. [2022-03-18 05:40:08,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 6567 transitions. [2022-03-18 05:40:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 05:40:08,410 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:08,410 INFO L500 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] [2022-03-18 05:40:08,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 05:40:08,411 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -229016606, now seen corresponding path program 1 times [2022-03-18 05:40:08,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:08,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [418940398] [2022-03-18 05:40:08,411 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:08,411 INFO L85 PathProgramCache]: Analyzing trace with hash -229016606, now seen corresponding path program 2 times [2022-03-18 05:40:08,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:08,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949089043] [2022-03-18 05:40:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:08,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:08,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:08,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:08,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949089043] [2022-03-18 05:40:08,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949089043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:08,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:08,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:08,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:08,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [418940398] [2022-03-18 05:40:08,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [418940398] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:08,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:08,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:08,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484846958] [2022-03-18 05:40:08,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:08,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:08,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:08,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:08,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:08,429 INFO L87 Difference]: Start difference. First operand 4105 states and 6567 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:08,949 INFO L93 Difference]: Finished difference Result 9677 states and 15593 transitions. [2022-03-18 05:40:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-18 05:40:08,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:08,961 INFO L225 Difference]: With dead ends: 9677 [2022-03-18 05:40:08,961 INFO L226 Difference]: Without dead ends: 5643 [2022-03-18 05:40:08,968 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:08,969 INFO L912 BasicCegarLoop]: 140 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:08,969 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 147 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2022-03-18 05:40:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5641. [2022-03-18 05:40:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5637 states have (on average 1.6015611140677666) internal successors, (9028), 5637 states have internal predecessors, (9028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 9031 transitions. [2022-03-18 05:40:09,357 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 9031 transitions. Word has length 32 [2022-03-18 05:40:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:09,357 INFO L478 AbstractCegarLoop]: Abstraction has 5641 states and 9031 transitions. [2022-03-18 05:40:09,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:09,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 9031 transitions. [2022-03-18 05:40:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 05:40:09,362 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:09,363 INFO L500 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] [2022-03-18 05:40:09,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 05:40:09,363 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1115389939, now seen corresponding path program 1 times [2022-03-18 05:40:09,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:09,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [253966521] [2022-03-18 05:40:09,363 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1115389939, now seen corresponding path program 2 times [2022-03-18 05:40:09,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:09,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128056067] [2022-03-18 05:40:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:09,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:09,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:09,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128056067] [2022-03-18 05:40:09,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128056067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:09,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:09,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:09,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [253966521] [2022-03-18 05:40:09,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [253966521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:09,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:09,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:09,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497787310] [2022-03-18 05:40:09,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:09,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:09,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:09,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:09,382 INFO L87 Difference]: Start difference. First operand 5641 states and 9031 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:09,819 INFO L93 Difference]: Finished difference Result 8461 states and 13513 transitions. [2022-03-18 05:40:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-18 05:40:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:09,838 INFO L225 Difference]: With dead ends: 8461 [2022-03-18 05:40:09,838 INFO L226 Difference]: Without dead ends: 5707 [2022-03-18 05:40:09,843 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:09,843 INFO L912 BasicCegarLoop]: 138 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:09,843 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-03-18 05:40:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5705. [2022-03-18 05:40:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5701 states have (on average 1.5835818277495177) internal successors, (9028), 5701 states have internal predecessors, (9028), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 9031 transitions. [2022-03-18 05:40:10,258 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 9031 transitions. Word has length 33 [2022-03-18 05:40:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:10,259 INFO L478 AbstractCegarLoop]: Abstraction has 5705 states and 9031 transitions. [2022-03-18 05:40:10,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 9031 transitions. [2022-03-18 05:40:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 05:40:10,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:10,283 INFO L500 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] [2022-03-18 05:40:10,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 05:40:10,283 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1490633615, now seen corresponding path program 1 times [2022-03-18 05:40:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:10,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1387441279] [2022-03-18 05:40:10,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:10,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1490633615, now seen corresponding path program 2 times [2022-03-18 05:40:10,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:10,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385342069] [2022-03-18 05:40:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:10,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:10,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:10,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385342069] [2022-03-18 05:40:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385342069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:10,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:10,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:10,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:10,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1387441279] [2022-03-18 05:40:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1387441279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:10,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:10,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326448804] [2022-03-18 05:40:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:10,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:10,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:10,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:10,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:10,303 INFO L87 Difference]: Start difference. First operand 5705 states and 9031 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:11,230 INFO L93 Difference]: Finished difference Result 10253 states and 16585 transitions. [2022-03-18 05:40:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-18 05:40:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:11,246 INFO L225 Difference]: With dead ends: 10253 [2022-03-18 05:40:11,247 INFO L226 Difference]: Without dead ends: 10251 [2022-03-18 05:40:11,248 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:11,248 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 204 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:11,249 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2022-03-18 05:40:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 8201. [2022-03-18 05:40:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.5386116872026352) internal successors, (12612), 8197 states have internal predecessors, (12612), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 12615 transitions. [2022-03-18 05:40:11,802 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 12615 transitions. Word has length 33 [2022-03-18 05:40:11,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:11,802 INFO L478 AbstractCegarLoop]: Abstraction has 8201 states and 12615 transitions. [2022-03-18 05:40:11,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:11,802 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 12615 transitions. [2022-03-18 05:40:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 05:40:11,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:11,808 INFO L500 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] [2022-03-18 05:40:11,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 05:40:11,809 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash -503511091, now seen corresponding path program 1 times [2022-03-18 05:40:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:11,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2110264531] [2022-03-18 05:40:11,809 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash -503511091, now seen corresponding path program 2 times [2022-03-18 05:40:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:11,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138678803] [2022-03-18 05:40:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:11,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:11,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:11,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138678803] [2022-03-18 05:40:11,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138678803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:11,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:11,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:11,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:11,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2110264531] [2022-03-18 05:40:11,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2110264531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:11,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:11,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801913060] [2022-03-18 05:40:11,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:11,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:11,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:11,835 INFO L87 Difference]: Start difference. First operand 8201 states and 12615 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:12,737 INFO L93 Difference]: Finished difference Result 19213 states and 29769 transitions. [2022-03-18 05:40:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-18 05:40:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:12,754 INFO L225 Difference]: With dead ends: 19213 [2022-03-18 05:40:12,754 INFO L226 Difference]: Without dead ends: 11147 [2022-03-18 05:40:12,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:12,767 INFO L912 BasicCegarLoop]: 142 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:12,767 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 149 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:12,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2022-03-18 05:40:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 11145. [2022-03-18 05:40:13,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11141 states have (on average 1.5398976752535678) internal successors, (17156), 11141 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 17159 transitions. [2022-03-18 05:40:13,692 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 17159 transitions. Word has length 33 [2022-03-18 05:40:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:13,692 INFO L478 AbstractCegarLoop]: Abstraction has 11145 states and 17159 transitions. [2022-03-18 05:40:13,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 17159 transitions. [2022-03-18 05:40:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 05:40:13,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:13,699 INFO L500 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] [2022-03-18 05:40:13,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 05:40:13,700 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:13,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:13,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1034784041, now seen corresponding path program 1 times [2022-03-18 05:40:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [671947961] [2022-03-18 05:40:13,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:13,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1034784041, now seen corresponding path program 2 times [2022-03-18 05:40:13,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351400729] [2022-03-18 05:40:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:13,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:13,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:13,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351400729] [2022-03-18 05:40:13,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351400729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:13,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:13,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:13,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:13,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [671947961] [2022-03-18 05:40:13,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [671947961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:13,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:13,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:13,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694004908] [2022-03-18 05:40:13,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:13,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:13,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:13,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:13,718 INFO L87 Difference]: Start difference. First operand 11145 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:14,688 INFO L93 Difference]: Finished difference Result 16717 states and 25673 transitions. [2022-03-18 05:40:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-18 05:40:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:14,701 INFO L225 Difference]: With dead ends: 16717 [2022-03-18 05:40:14,701 INFO L226 Difference]: Without dead ends: 11275 [2022-03-18 05:40:14,710 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:14,710 INFO L912 BasicCegarLoop]: 135 mSDtfsCounter, 189 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:14,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 142 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2022-03-18 05:40:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11273. [2022-03-18 05:40:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 11269 states have (on average 1.5224066021829799) internal successors, (17156), 11269 states have internal predecessors, (17156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 17159 transitions. [2022-03-18 05:40:15,597 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 17159 transitions. Word has length 34 [2022-03-18 05:40:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:15,598 INFO L478 AbstractCegarLoop]: Abstraction has 11273 states and 17159 transitions. [2022-03-18 05:40:15,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 17159 transitions. [2022-03-18 05:40:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 05:40:15,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:15,604 INFO L500 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] [2022-03-18 05:40:15,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 05:40:15,605 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1571239513, now seen corresponding path program 1 times [2022-03-18 05:40:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:15,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438928771] [2022-03-18 05:40:15,605 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1571239513, now seen corresponding path program 2 times [2022-03-18 05:40:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:15,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952595584] [2022-03-18 05:40:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:15,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952595584] [2022-03-18 05:40:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952595584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:15,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:15,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:15,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438928771] [2022-03-18 05:40:15,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438928771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:15,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979859514] [2022-03-18 05:40:15,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:15,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:15,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:15,635 INFO L87 Difference]: Start difference. First operand 11273 states and 17159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:17,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:17,176 INFO L93 Difference]: Finished difference Result 19981 states and 31113 transitions. [2022-03-18 05:40:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-18 05:40:17,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:17,201 INFO L225 Difference]: With dead ends: 19981 [2022-03-18 05:40:17,202 INFO L226 Difference]: Without dead ends: 19979 [2022-03-18 05:40:17,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:17,207 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:17,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19979 states. [2022-03-18 05:40:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19979 to 16393. [2022-03-18 05:40:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 16389 states have (on average 1.4763560925010677) internal successors, (24196), 16389 states have internal predecessors, (24196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 24199 transitions. [2022-03-18 05:40:18,667 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 24199 transitions. Word has length 34 [2022-03-18 05:40:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:18,667 INFO L478 AbstractCegarLoop]: Abstraction has 16393 states and 24199 transitions. [2022-03-18 05:40:18,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 24199 transitions. [2022-03-18 05:40:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 05:40:18,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:18,682 INFO L500 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] [2022-03-18 05:40:18,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 05:40:18,682 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash -422905193, now seen corresponding path program 1 times [2022-03-18 05:40:18,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:18,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [519476634] [2022-03-18 05:40:18,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash -422905193, now seen corresponding path program 2 times [2022-03-18 05:40:18,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:18,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389743857] [2022-03-18 05:40:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:18,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:18,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:18,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:18,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389743857] [2022-03-18 05:40:18,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389743857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:18,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:18,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:18,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [519476634] [2022-03-18 05:40:18,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [519476634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:18,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:18,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:18,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554381815] [2022-03-18 05:40:18,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:18,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:18,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:18,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:18,717 INFO L87 Difference]: Start difference. First operand 16393 states and 24199 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:20,546 INFO L93 Difference]: Finished difference Result 38157 states and 56713 transitions. [2022-03-18 05:40:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:20,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-18 05:40:20,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:20,573 INFO L225 Difference]: With dead ends: 38157 [2022-03-18 05:40:20,573 INFO L226 Difference]: Without dead ends: 22027 [2022-03-18 05:40:20,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:20,596 INFO L912 BasicCegarLoop]: 144 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:20,596 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 151 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2022-03-18 05:40:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22025. [2022-03-18 05:40:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22025 states, 22021 states have (on average 1.4765905272240134) internal successors, (32516), 22021 states have internal predecessors, (32516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22025 states to 22025 states and 32519 transitions. [2022-03-18 05:40:22,389 INFO L78 Accepts]: Start accepts. Automaton has 22025 states and 32519 transitions. Word has length 34 [2022-03-18 05:40:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:22,389 INFO L478 AbstractCegarLoop]: Abstraction has 22025 states and 32519 transitions. [2022-03-18 05:40:22,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 22025 states and 32519 transitions. [2022-03-18 05:40:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 05:40:22,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:22,402 INFO L500 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] [2022-03-18 05:40:22,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 05:40:22,402 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1463999138, now seen corresponding path program 1 times [2022-03-18 05:40:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1405467345] [2022-03-18 05:40:22,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:22,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1463999138, now seen corresponding path program 2 times [2022-03-18 05:40:22,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:22,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793093247] [2022-03-18 05:40:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:22,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:22,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793093247] [2022-03-18 05:40:22,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793093247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:22,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:22,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:22,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1405467345] [2022-03-18 05:40:22,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1405467345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:22,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:22,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484290010] [2022-03-18 05:40:22,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:22,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:22,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:22,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:22,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:22,429 INFO L87 Difference]: Start difference. First operand 22025 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:24,372 INFO L93 Difference]: Finished difference Result 33037 states and 48649 transitions. [2022-03-18 05:40:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:24,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 05:40:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:24,403 INFO L225 Difference]: With dead ends: 33037 [2022-03-18 05:40:24,403 INFO L226 Difference]: Without dead ends: 22283 [2022-03-18 05:40:24,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:24,424 INFO L912 BasicCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:24,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 139 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2022-03-18 05:40:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22281. [2022-03-18 05:40:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22281 states, 22277 states have (on average 1.4596220316918795) internal successors, (32516), 22277 states have internal predecessors, (32516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22281 states to 22281 states and 32519 transitions. [2022-03-18 05:40:26,287 INFO L78 Accepts]: Start accepts. Automaton has 22281 states and 32519 transitions. Word has length 35 [2022-03-18 05:40:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:26,287 INFO L478 AbstractCegarLoop]: Abstraction has 22281 states and 32519 transitions. [2022-03-18 05:40:26,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 22281 states and 32519 transitions. [2022-03-18 05:40:26,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 05:40:26,301 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:26,301 INFO L500 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] [2022-03-18 05:40:26,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 05:40:26,301 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash -224944604, now seen corresponding path program 1 times [2022-03-18 05:40:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:26,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [978711954] [2022-03-18 05:40:26,302 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash -224944604, now seen corresponding path program 2 times [2022-03-18 05:40:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:26,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602650585] [2022-03-18 05:40:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:26,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:26,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:26,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602650585] [2022-03-18 05:40:26,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602650585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:26,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:26,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:26,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [978711954] [2022-03-18 05:40:26,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [978711954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:26,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:26,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:26,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823519660] [2022-03-18 05:40:26,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:26,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:26,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:26,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:26,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:26,320 INFO L87 Difference]: Start difference. First operand 22281 states and 32519 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:29,976 INFO L93 Difference]: Finished difference Result 65293 states and 94473 transitions. [2022-03-18 05:40:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:29,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 05:40:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:30,046 INFO L225 Difference]: With dead ends: 65293 [2022-03-18 05:40:30,046 INFO L226 Difference]: Without dead ends: 43531 [2022-03-18 05:40:30,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:30,084 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:30,084 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 117 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2022-03-18 05:40:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43529. [2022-03-18 05:40:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.4234577828834003) internal successors, (61956), 43525 states have internal predecessors, (61956), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61959 transitions. [2022-03-18 05:40:33,936 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61959 transitions. Word has length 35 [2022-03-18 05:40:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:33,936 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61959 transitions. [2022-03-18 05:40:33,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61959 transitions. [2022-03-18 05:40:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 05:40:33,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:33,959 INFO L500 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] [2022-03-18 05:40:33,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 05:40:33,959 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:33,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1769200102, now seen corresponding path program 1 times [2022-03-18 05:40:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:33,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358266121] [2022-03-18 05:40:33,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1769200102, now seen corresponding path program 2 times [2022-03-18 05:40:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:33,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214661621] [2022-03-18 05:40:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:33,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:33,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:33,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214661621] [2022-03-18 05:40:33,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214661621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:33,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:33,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:33,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:33,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358266121] [2022-03-18 05:40:33,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358266121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:33,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:33,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:33,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179373614] [2022-03-18 05:40:33,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:33,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:33,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:33,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:33,988 INFO L87 Difference]: Start difference. First operand 43529 states and 61959 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:38,540 INFO L93 Difference]: Finished difference Result 49677 states and 73225 transitions. [2022-03-18 05:40:38,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:38,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 05:40:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:38,627 INFO L225 Difference]: With dead ends: 49677 [2022-03-18 05:40:38,627 INFO L226 Difference]: Without dead ends: 49675 [2022-03-18 05:40:38,650 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:38,650 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:38,650 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 156 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:38,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2022-03-18 05:40:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43529. [2022-03-18 05:40:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43529 states, 43525 states have (on average 1.411694428489374) internal successors, (61444), 43525 states have internal predecessors, (61444), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43529 states to 43529 states and 61447 transitions. [2022-03-18 05:40:42,520 INFO L78 Accepts]: Start accepts. Automaton has 43529 states and 61447 transitions. Word has length 35 [2022-03-18 05:40:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:42,520 INFO L478 AbstractCegarLoop]: Abstraction has 43529 states and 61447 transitions. [2022-03-18 05:40:42,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43529 states and 61447 transitions. [2022-03-18 05:40:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 05:40:42,540 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:42,540 INFO L500 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] [2022-03-18 05:40:42,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 05:40:42,541 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1616866700, now seen corresponding path program 1 times [2022-03-18 05:40:42,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:42,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420276584] [2022-03-18 05:40:42,541 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1616866700, now seen corresponding path program 2 times [2022-03-18 05:40:42,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:42,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591209078] [2022-03-18 05:40:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:42,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:42,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:42,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:42,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591209078] [2022-03-18 05:40:42,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591209078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:42,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:42,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:42,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:42,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420276584] [2022-03-18 05:40:42,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420276584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:42,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:42,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:42,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518760137] [2022-03-18 05:40:42,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:42,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:42,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:42,560 INFO L87 Difference]: Start difference. First operand 43529 states and 61447 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:40:49,557 INFO L93 Difference]: Finished difference Result 75277 states and 108553 transitions. [2022-03-18 05:40:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:40:49,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-18 05:40:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:40:49,695 INFO L225 Difference]: With dead ends: 75277 [2022-03-18 05:40:49,695 INFO L226 Difference]: Without dead ends: 75275 [2022-03-18 05:40:49,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:40:49,719 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:40:49,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:40:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2022-03-18 05:40:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65033. [2022-03-18 05:40:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65033 states, 65029 states have (on average 1.3700349075028064) internal successors, (89092), 65029 states have internal predecessors, (89092), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65033 states to 65033 states and 89095 transitions. [2022-03-18 05:40:55,965 INFO L78 Accepts]: Start accepts. Automaton has 65033 states and 89095 transitions. Word has length 36 [2022-03-18 05:40:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:40:55,965 INFO L478 AbstractCegarLoop]: Abstraction has 65033 states and 89095 transitions. [2022-03-18 05:40:55,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:40:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 65033 states and 89095 transitions. [2022-03-18 05:40:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 05:40:56,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:40:56,024 INFO L500 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] [2022-03-18 05:40:56,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 05:40:56,024 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:40:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:40:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash -377278006, now seen corresponding path program 1 times [2022-03-18 05:40:56,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:56,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393597706] [2022-03-18 05:40:56,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:40:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash -377278006, now seen corresponding path program 2 times [2022-03-18 05:40:56,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:40:56,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723701955] [2022-03-18 05:40:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:40:56,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:40:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:56,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:40:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:40:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:40:56,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:40:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723701955] [2022-03-18 05:40:56,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723701955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:56,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:56,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:56,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:40:56,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393597706] [2022-03-18 05:40:56,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393597706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:40:56,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:40:56,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:40:56,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356454952] [2022-03-18 05:40:56,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:40:56,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:40:56,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:40:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:40:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:40:56,064 INFO L87 Difference]: Start difference. First operand 65033 states and 89095 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:41:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:41:04,299 INFO L93 Difference]: Finished difference Result 150029 states and 206857 transitions. [2022-03-18 05:41:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:41:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-18 05:41:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:41:04,591 INFO L225 Difference]: With dead ends: 150029 [2022-03-18 05:41:04,591 INFO L226 Difference]: Without dead ends: 85515 [2022-03-18 05:41:04,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:41:04,666 INFO L912 BasicCegarLoop]: 148 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:41:04,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 155 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:41:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2022-03-18 05:41:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85513. [2022-03-18 05:41:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85513 states, 85509 states have (on average 1.3652364078634998) internal successors, (116740), 85509 states have internal predecessors, (116740), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:41:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85513 states to 85513 states and 116743 transitions. [2022-03-18 05:41:13,313 INFO L78 Accepts]: Start accepts. Automaton has 85513 states and 116743 transitions. Word has length 36 [2022-03-18 05:41:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:41:13,313 INFO L478 AbstractCegarLoop]: Abstraction has 85513 states and 116743 transitions. [2022-03-18 05:41:13,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:41:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 85513 states and 116743 transitions. [2022-03-18 05:41:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 05:41:13,361 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:41:13,361 INFO L500 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] [2022-03-18 05:41:13,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-18 05:41:13,362 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:41:13,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:41:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1416524679, now seen corresponding path program 1 times [2022-03-18 05:41:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:41:13,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624828617] [2022-03-18 05:41:13,362 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:41:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1416524679, now seen corresponding path program 2 times [2022-03-18 05:41:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:41:13,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984986534] [2022-03-18 05:41:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:41:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:41:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:41:13,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:41:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:41:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:41:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:41:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984986534] [2022-03-18 05:41:13,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984986534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:41:13,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:41:13,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:41:13,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:41:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624828617] [2022-03-18 05:41:13,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624828617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:41:13,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:41:13,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:41:13,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006031359] [2022-03-18 05:41:13,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:41:13,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:41:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:41:13,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:41:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:41:13,386 INFO L87 Difference]: Start difference. First operand 85513 states and 116743 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:41:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:41:21,906 INFO L93 Difference]: Finished difference Result 129037 states and 176137 transitions. [2022-03-18 05:41:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:41:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 05:41:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:41:22,088 INFO L225 Difference]: With dead ends: 129037 [2022-03-18 05:41:22,088 INFO L226 Difference]: Without dead ends: 87051 [2022-03-18 05:41:22,300 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:41:22,300 INFO L912 BasicCegarLoop]: 126 mSDtfsCounter, 186 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:41:22,300 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:41:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87051 states. [2022-03-18 05:41:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87051 to 87049. [2022-03-18 05:41:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87049 states, 87045 states have (on average 1.3529094146705727) internal successors, (117764), 87045 states have internal predecessors, (117764), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:41:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87049 states to 87049 states and 117767 transitions. [2022-03-18 05:41:30,894 INFO L78 Accepts]: Start accepts. Automaton has 87049 states and 117767 transitions. Word has length 37 [2022-03-18 05:41:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:41:30,894 INFO L478 AbstractCegarLoop]: Abstraction has 87049 states and 117767 transitions. [2022-03-18 05:41:30,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:41:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 87049 states and 117767 transitions. [2022-03-18 05:41:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 05:41:31,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:41:31,137 INFO L500 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] [2022-03-18 05:41:31,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-18 05:41:31,138 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:41:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:41:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1189498875, now seen corresponding path program 1 times [2022-03-18 05:41:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:41:31,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1750278055] [2022-03-18 05:41:31,138 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:41:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1189498875, now seen corresponding path program 2 times [2022-03-18 05:41:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:41:31,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429410514] [2022-03-18 05:41:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:41:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:41:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:41:31,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:41:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:41:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:41:31,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:41:31,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429410514] [2022-03-18 05:41:31,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429410514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:41:31,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:41:31,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:41:31,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:41:31,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1750278055] [2022-03-18 05:41:31,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1750278055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:41:31,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:41:31,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:41:31,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767838771] [2022-03-18 05:41:31,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:41:31,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:41:31,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:41:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:41:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:41:31,198 INFO L87 Difference]: Start difference. First operand 87049 states and 117767 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:41:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:41:45,887 INFO L93 Difference]: Finished difference Result 147469 states and 202761 transitions. [2022-03-18 05:41:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:41:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 05:41:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:41:46,389 INFO L225 Difference]: With dead ends: 147469 [2022-03-18 05:41:46,390 INFO L226 Difference]: Without dead ends: 147467 [2022-03-18 05:41:46,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:41:46,436 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:41:46,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:41:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-03-18 05:41:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 131081. [2022-03-18 05:42:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131081 states, 131077 states have (on average 1.312480450422271) internal successors, (172036), 131077 states have internal predecessors, (172036), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:42:00,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131081 states to 131081 states and 172039 transitions. [2022-03-18 05:42:00,540 INFO L78 Accepts]: Start accepts. Automaton has 131081 states and 172039 transitions. Word has length 37 [2022-03-18 05:42:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:42:00,541 INFO L478 AbstractCegarLoop]: Abstraction has 131081 states and 172039 transitions. [2022-03-18 05:42:00,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:42:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 131081 states and 172039 transitions. [2022-03-18 05:42:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 05:42:00,653 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:42:00,654 INFO L500 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] [2022-03-18 05:42:00,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-18 05:42:00,654 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:42:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:42:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash -804645831, now seen corresponding path program 1 times [2022-03-18 05:42:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:42:00,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1539748590] [2022-03-18 05:42:00,654 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:42:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash -804645831, now seen corresponding path program 2 times [2022-03-18 05:42:00,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:42:00,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607579761] [2022-03-18 05:42:00,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:42:00,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:42:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:42:00,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:42:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:42:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:42:00,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:42:00,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607579761] [2022-03-18 05:42:00,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607579761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:42:00,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:42:00,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:42:00,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:42:00,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1539748590] [2022-03-18 05:42:00,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1539748590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:42:00,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:42:00,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:42:00,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012866385] [2022-03-18 05:42:00,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:42:00,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:42:00,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:42:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:42:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:42:00,689 INFO L87 Difference]: Start difference. First operand 131081 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:42:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:42:18,330 INFO L93 Difference]: Finished difference Result 299021 states and 393225 transitions. [2022-03-18 05:42:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 05:42:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-18 05:42:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:42:18,751 INFO L225 Difference]: With dead ends: 299021 [2022-03-18 05:42:18,751 INFO L226 Difference]: Without dead ends: 169995 [2022-03-18 05:42:18,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:42:18,927 INFO L912 BasicCegarLoop]: 150 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:42:18,928 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 157 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:42:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169995 states. [2022-03-18 05:42:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169995 to 169993. [2022-03-18 05:42:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169993 states, 169989 states have (on average 1.3011900770049827) internal successors, (221188), 169989 states have internal predecessors, (221188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:42:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169993 states to 169993 states and 221191 transitions. [2022-03-18 05:42:37,065 INFO L78 Accepts]: Start accepts. Automaton has 169993 states and 221191 transitions. Word has length 37 [2022-03-18 05:42:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:42:37,065 INFO L478 AbstractCegarLoop]: Abstraction has 169993 states and 221191 transitions. [2022-03-18 05:42:37,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 05:42:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 169993 states and 221191 transitions. [2022-03-18 05:42:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 05:42:37,190 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:42:37,190 INFO L500 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] [2022-03-18 05:42:37,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-18 05:42:37,190 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:42:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:42:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1780025025, now seen corresponding path program 1 times [2022-03-18 05:42:37,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:42:37,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808992921] [2022-03-18 05:42:37,191 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:42:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1780025025, now seen corresponding path program 2 times [2022-03-18 05:42:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:42:37,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314859838] [2022-03-18 05:42:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:42:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:42:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:42:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:42:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:42:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:42:37,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:42:37,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314859838] [2022-03-18 05:42:37,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314859838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:42:37,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:42:37,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:42:37,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:42:37,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808992921] [2022-03-18 05:42:37,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808992921] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:42:37,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:42:37,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 05:42:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177594792] [2022-03-18 05:42:37,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:42:37,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 05:42:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:42:37,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 05:42:37,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 05:42:37,219 INFO L87 Difference]: Start difference. First operand 169993 states and 221191 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)