/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:16:40,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:16:40,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:16:40,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:16:40,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:16:40,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:16:40,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:16:40,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 17:16:40,824 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:16:40,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:16:40,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:16:40,825 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 17:16:40,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:16:40,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:16:40,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:16:40,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:16:40,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:16:40,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:16:40,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:16:40,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:16:40,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:16:40,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:16:40,829 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:16:40,829 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:16:40,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:16:40,829 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 17:16:40,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:16:41,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:16:41,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:16:41,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:16:41,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:16:41,071 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:16:41,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-20 17:16:41,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed592c051/6b144132f42e41ff88433e4c3aa69b6c/FLAG3962e689a [2022-03-20 17:16:41,451 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:16:41,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-20 17:16:41,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed592c051/6b144132f42e41ff88433e4c3aa69b6c/FLAG3962e689a [2022-03-20 17:16:41,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed592c051/6b144132f42e41ff88433e4c3aa69b6c [2022-03-20 17:16:41,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:16:41,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:16:41,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:16:41,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:16:41,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:16:41,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:16:41" (1/1) ... [2022-03-20 17:16:41,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b170159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:41, skipping insertion in model container [2022-03-20 17:16:41,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:16:41" (1/1) ... [2022-03-20 17:16:41,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:16:41,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:16:42,058 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_14-1.c[5283,5296] [2022-03-20 17:16:42,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:16:42,065 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:16:42,089 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_14-1.c[5283,5296] [2022-03-20 17:16:42,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:16:42,102 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:16:42,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42 WrapperNode [2022-03-20 17:16:42,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:16:42,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:16:42,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:16:42,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:16:42,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:16:42,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:16:42,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:16:42,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:16:42,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (1/1) ... [2022-03-20 17:16:42,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:16:42,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:16:42,179 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) [2022-03-20 17:16:42,184 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 [2022-03-20 17:16:42,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:16:42,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:16:42,214 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:16:42,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:16:42,214 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:16:42,214 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:16:42,214 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:16:42,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:16:42,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:16:42,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:16:42,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:16:42,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:16:42,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:16:42,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:16:42,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:16:42,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:16:42,282 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:16:42,283 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:16:42,521 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:16:42,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:16:42,526 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:16:42,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:16:42 BoogieIcfgContainer [2022-03-20 17:16:42,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:16:42,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:16:42,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:16:42,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:16:42,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:16:41" (1/3) ... [2022-03-20 17:16:42,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29aa6bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:16:42, skipping insertion in model container [2022-03-20 17:16:42,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:16:42" (2/3) ... [2022-03-20 17:16:42,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29aa6bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:16:42, skipping insertion in model container [2022-03-20 17:16:42,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:16:42" (3/3) ... [2022-03-20 17:16:42,543 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2022-03-20 17:16:42,546 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:16:42,546 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:16:42,591 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:16:42,598 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 [2022-03-20 17:16:42,598 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:16:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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) [2022-03-20 17:16:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 17:16:42,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:42,619 INFO L499 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] [2022-03-20 17:16:42,620 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:42,624 INFO L85 PathProgramCache]: Analyzing trace with hash -406532905, now seen corresponding path program 1 times [2022-03-20 17:16:42,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:42,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [658446092] [2022-03-20 17:16:42,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:42,638 INFO L85 PathProgramCache]: Analyzing trace with hash -406532905, now seen corresponding path program 2 times [2022-03-20 17:16:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465227555] [2022-03-20 17:16:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:42,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:42,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:42,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465227555] [2022-03-20 17:16:42,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465227555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:42,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:42,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:42,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:42,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [658446092] [2022-03-20 17:16:42,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [658446092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:42,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:42,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:42,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534191838] [2022-03-20 17:16:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:42,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:42,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:42,899 INFO L87 Difference]: Start difference. First operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 17:16:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:43,081 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2022-03-20 17:16:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-03-20 17:16:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:43,096 INFO L225 Difference]: With dead ends: 112 [2022-03-20 17:16:43,096 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 17:16:43,098 INFO L912 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 [2022-03-20 17:16:43,101 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:43,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 17:16:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-03-20 17:16:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 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) [2022-03-20 17:16:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-03-20 17:16:43,144 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-03-20 17:16:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:43,144 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-03-20 17:16:43,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 17:16:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-03-20 17:16:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 17:16:43,146 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:43,146 INFO L499 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] [2022-03-20 17:16:43,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:16:43,147 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1994880807, now seen corresponding path program 1 times [2022-03-20 17:16:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [441421279] [2022-03-20 17:16:43,149 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:43,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1994880807, now seen corresponding path program 2 times [2022-03-20 17:16:43,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:43,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239617952] [2022-03-20 17:16:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:43,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239617952] [2022-03-20 17:16:43,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239617952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [441421279] [2022-03-20 17:16:43,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [441421279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709402540] [2022-03-20 17:16:43,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:43,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:43,242 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 17:16:43,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:43,342 INFO L93 Difference]: Finished difference Result 158 states and 293 transitions. [2022-03-20 17:16:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:43,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-03-20 17:16:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:43,344 INFO L225 Difference]: With dead ends: 158 [2022-03-20 17:16:43,344 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 17:16:43,344 INFO L912 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 [2022-03-20 17:16:43,345 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 127 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 [2022-03-20 17:16:43,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 17:16:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-03-20 17:16:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.879120879120879) internal successors, (171), 91 states have internal predecessors, (171), 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) [2022-03-20 17:16:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-03-20 17:16:43,383 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-03-20 17:16:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:43,384 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-03-20 17:16:43,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 17:16:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-03-20 17:16:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 17:16:43,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:43,385 INFO L499 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] [2022-03-20 17:16:43,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:16:43,385 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash 282593920, now seen corresponding path program 1 times [2022-03-20 17:16:43,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1457358768] [2022-03-20 17:16:43,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash 282593920, now seen corresponding path program 2 times [2022-03-20 17:16:43,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:43,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080088328] [2022-03-20 17:16:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:43,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:43,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:43,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080088328] [2022-03-20 17:16:43,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080088328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:43,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1457358768] [2022-03-20 17:16:43,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1457358768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904488159] [2022-03-20 17:16:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:43,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:43,429 INFO L87 Difference]: Start difference. First operand 95 states and 174 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) [2022-03-20 17:16:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:43,517 INFO L93 Difference]: Finished difference Result 145 states and 262 transitions. [2022-03-20 17:16:43,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:43,518 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 [2022-03-20 17:16:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:43,518 INFO L225 Difference]: With dead ends: 145 [2022-03-20 17:16:43,519 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 17:16:43,519 INFO L912 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 [2022-03-20 17:16:43,520 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 153 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 [2022-03-20 17:16:43,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 153 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 17:16:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-03-20 17:16:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 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) [2022-03-20 17:16:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-03-20 17:16:43,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-03-20 17:16:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:43,529 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-03-20 17:16:43,529 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) [2022-03-20 17:16:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-03-20 17:16:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 17:16:43,530 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:43,530 INFO L499 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] [2022-03-20 17:16:43,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 17:16:43,531 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:43,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1711550786, now seen corresponding path program 1 times [2022-03-20 17:16:43,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [288317778] [2022-03-20 17:16:43,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1711550786, now seen corresponding path program 2 times [2022-03-20 17:16:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:43,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760633863] [2022-03-20 17:16:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:43,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760633863] [2022-03-20 17:16:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760633863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:43,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [288317778] [2022-03-20 17:16:43,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [288317778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983019518] [2022-03-20 17:16:43,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:43,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:43,588 INFO L87 Difference]: Start difference. First operand 98 states and 176 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) [2022-03-20 17:16:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:43,702 INFO L93 Difference]: Finished difference Result 274 states and 504 transitions. [2022-03-20 17:16:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:43,702 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 [2022-03-20 17:16:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:43,704 INFO L225 Difference]: With dead ends: 274 [2022-03-20 17:16:43,704 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 17:16:43,705 INFO L912 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 [2022-03-20 17:16:43,706 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 231 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 103 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 [2022-03-20 17:16:43,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 103 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 17:16:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-03-20 17:16:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8435754189944134) internal successors, (330), 179 states have internal predecessors, (330), 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) [2022-03-20 17:16:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 333 transitions. [2022-03-20 17:16:43,725 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 333 transitions. Word has length 26 [2022-03-20 17:16:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:43,725 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 333 transitions. [2022-03-20 17:16:43,725 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) [2022-03-20 17:16:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 333 transitions. [2022-03-20 17:16:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 17:16:43,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:43,726 INFO L499 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] [2022-03-20 17:16:43,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:16:43,727 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash -123202884, now seen corresponding path program 1 times [2022-03-20 17:16:43,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554353181] [2022-03-20 17:16:43,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash -123202884, now seen corresponding path program 2 times [2022-03-20 17:16:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:43,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439697720] [2022-03-20 17:16:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:43,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:43,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439697720] [2022-03-20 17:16:43,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439697720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:43,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554353181] [2022-03-20 17:16:43,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554353181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462856081] [2022-03-20 17:16:43,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:43,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:43,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:43,788 INFO L87 Difference]: Start difference. First operand 183 states and 333 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) [2022-03-20 17:16:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:43,878 INFO L93 Difference]: Finished difference Result 239 states and 435 transitions. [2022-03-20 17:16:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:43,879 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 [2022-03-20 17:16:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:43,880 INFO L225 Difference]: With dead ends: 239 [2022-03-20 17:16:43,880 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 17:16:43,881 INFO L912 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 [2022-03-20 17:16:43,883 INFO L913 BasicCegarLoop]: 169 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 176 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 [2022-03-20 17:16:43,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 176 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 17:16:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2022-03-20 17:16:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8324022346368716) internal successors, (328), 179 states have internal predecessors, (328), 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) [2022-03-20 17:16:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-03-20 17:16:43,907 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-03-20 17:16:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:43,908 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-03-20 17:16:43,908 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) [2022-03-20 17:16:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-03-20 17:16:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:16:43,909 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:43,909 INFO L499 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] [2022-03-20 17:16:43,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 17:16:43,909 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1518254386, now seen corresponding path program 1 times [2022-03-20 17:16:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1433800449] [2022-03-20 17:16:43,911 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1518254386, now seen corresponding path program 2 times [2022-03-20 17:16:43,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:43,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209440851] [2022-03-20 17:16:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:43,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:43,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209440851] [2022-03-20 17:16:43,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209440851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:43,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1433800449] [2022-03-20 17:16:43,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1433800449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:43,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:43,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:43,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284825782] [2022-03-20 17:16:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:43,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:43,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:43,954 INFO L87 Difference]: Start difference. First operand 183 states and 331 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) [2022-03-20 17:16:44,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:44,041 INFO L93 Difference]: Finished difference Result 347 states and 635 transitions. [2022-03-20 17:16:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:44,041 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 [2022-03-20 17:16:44,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:44,042 INFO L225 Difference]: With dead ends: 347 [2022-03-20 17:16:44,043 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 17:16:44,043 INFO L912 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 [2022-03-20 17:16:44,043 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 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 [2022-03-20 17:16:44,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 17:16:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-03-20 17:16:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.8189300411522633) internal successors, (442), 243 states have internal predecessors, (442), 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) [2022-03-20 17:16:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 445 transitions. [2022-03-20 17:16:44,061 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 445 transitions. Word has length 27 [2022-03-20 17:16:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:44,061 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 445 transitions. [2022-03-20 17:16:44,061 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) [2022-03-20 17:16:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 445 transitions. [2022-03-20 17:16:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:16:44,062 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:44,062 INFO L499 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] [2022-03-20 17:16:44,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 17:16:44,062 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365008, now seen corresponding path program 1 times [2022-03-20 17:16:44,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828746937] [2022-03-20 17:16:44,063 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:44,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365008, now seen corresponding path program 2 times [2022-03-20 17:16:44,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:44,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979580010] [2022-03-20 17:16:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:44,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:44,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:44,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979580010] [2022-03-20 17:16:44,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979580010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:44,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828746937] [2022-03-20 17:16:44,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828746937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089656076] [2022-03-20 17:16:44,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:44,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:44,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:44,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:44,099 INFO L87 Difference]: Start difference. First operand 247 states and 445 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) [2022-03-20 17:16:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:44,197 INFO L93 Difference]: Finished difference Result 591 states and 1075 transitions. [2022-03-20 17:16:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:44,197 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 [2022-03-20 17:16:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:44,198 INFO L225 Difference]: With dead ends: 591 [2022-03-20 17:16:44,198 INFO L226 Difference]: Without dead ends: 353 [2022-03-20 17:16:44,201 INFO L912 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 [2022-03-20 17:16:44,201 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 131 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 [2022-03-20 17:16:44,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 131 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-20 17:16:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2022-03-20 17:16:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.8097982708933718) internal successors, (628), 347 states have internal predecessors, (628), 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) [2022-03-20 17:16:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 631 transitions. [2022-03-20 17:16:44,241 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 631 transitions. Word has length 27 [2022-03-20 17:16:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:44,241 INFO L478 AbstractCegarLoop]: Abstraction has 351 states and 631 transitions. [2022-03-20 17:16:44,241 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) [2022-03-20 17:16:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 631 transitions. [2022-03-20 17:16:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:16:44,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:44,244 INFO L499 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] [2022-03-20 17:16:44,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 17:16:44,244 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash 178967059, now seen corresponding path program 1 times [2022-03-20 17:16:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103922597] [2022-03-20 17:16:44,245 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 178967059, now seen corresponding path program 2 times [2022-03-20 17:16:44,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:44,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040457359] [2022-03-20 17:16:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:44,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040457359] [2022-03-20 17:16:44,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040457359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103922597] [2022-03-20 17:16:44,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103922597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087028398] [2022-03-20 17:16:44,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:44,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:44,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:44,297 INFO L87 Difference]: Start difference. First operand 351 states and 631 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) [2022-03-20 17:16:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:44,383 INFO L93 Difference]: Finished difference Result 529 states and 949 transitions. [2022-03-20 17:16:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:44,383 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 [2022-03-20 17:16:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:44,385 INFO L225 Difference]: With dead ends: 529 [2022-03-20 17:16:44,385 INFO L226 Difference]: Without dead ends: 359 [2022-03-20 17:16:44,385 INFO L912 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 [2022-03-20 17:16:44,386 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 147 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 [2022-03-20 17:16:44,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 147 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-20 17:16:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-03-20 17:16:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7903682719546743) internal successors, (632), 353 states have internal predecessors, (632), 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) [2022-03-20 17:16:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 635 transitions. [2022-03-20 17:16:44,406 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 635 transitions. Word has length 28 [2022-03-20 17:16:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:44,406 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 635 transitions. [2022-03-20 17:16:44,406 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) [2022-03-20 17:16:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 635 transitions. [2022-03-20 17:16:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:16:44,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:44,407 INFO L499 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] [2022-03-20 17:16:44,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 17:16:44,407 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1815177647, now seen corresponding path program 1 times [2022-03-20 17:16:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848163412] [2022-03-20 17:16:44,408 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1815177647, now seen corresponding path program 2 times [2022-03-20 17:16:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784407254] [2022-03-20 17:16:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:44,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784407254] [2022-03-20 17:16:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784407254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848163412] [2022-03-20 17:16:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848163412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593830793] [2022-03-20 17:16:44,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:44,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:44,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:44,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:44,431 INFO L87 Difference]: Start difference. First operand 357 states and 635 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) [2022-03-20 17:16:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:44,525 INFO L93 Difference]: Finished difference Result 669 states and 1205 transitions. [2022-03-20 17:16:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:44,525 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 [2022-03-20 17:16:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:44,528 INFO L225 Difference]: With dead ends: 669 [2022-03-20 17:16:44,528 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 17:16:44,528 INFO L912 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 [2022-03-20 17:16:44,528 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 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 [2022-03-20 17:16:44,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 17:16:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-03-20 17:16:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7649484536082474) internal successors, (856), 485 states have internal predecessors, (856), 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) [2022-03-20 17:16:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 859 transitions. [2022-03-20 17:16:44,557 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 859 transitions. Word has length 28 [2022-03-20 17:16:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:44,557 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 859 transitions. [2022-03-20 17:16:44,557 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) [2022-03-20 17:16:44,557 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 859 transitions. [2022-03-20 17:16:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:16:44,558 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:44,558 INFO L499 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] [2022-03-20 17:16:44,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 17:16:44,558 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:44,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:44,559 INFO L85 PathProgramCache]: Analyzing trace with hash 891441747, now seen corresponding path program 1 times [2022-03-20 17:16:44,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [205952514] [2022-03-20 17:16:44,559 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:44,559 INFO L85 PathProgramCache]: Analyzing trace with hash 891441747, now seen corresponding path program 2 times [2022-03-20 17:16:44,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:44,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056642146] [2022-03-20 17:16:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:44,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:44,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:44,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056642146] [2022-03-20 17:16:44,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056642146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:44,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [205952514] [2022-03-20 17:16:44,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [205952514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165543959] [2022-03-20 17:16:44,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:44,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:44,581 INFO L87 Difference]: Start difference. First operand 489 states and 859 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) [2022-03-20 17:16:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:44,689 INFO L93 Difference]: Finished difference Result 1165 states and 2061 transitions. [2022-03-20 17:16:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:44,689 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 [2022-03-20 17:16:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:44,691 INFO L225 Difference]: With dead ends: 1165 [2022-03-20 17:16:44,691 INFO L226 Difference]: Without dead ends: 691 [2022-03-20 17:16:44,692 INFO L912 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 [2022-03-20 17:16:44,693 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:44,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-20 17:16:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-03-20 17:16:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7576642335766424) internal successors, (1204), 685 states have internal predecessors, (1204), 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) [2022-03-20 17:16:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1207 transitions. [2022-03-20 17:16:44,731 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1207 transitions. Word has length 28 [2022-03-20 17:16:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:44,731 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 1207 transitions. [2022-03-20 17:16:44,732 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) [2022-03-20 17:16:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1207 transitions. [2022-03-20 17:16:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:16:44,732 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:44,732 INFO L499 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] [2022-03-20 17:16:44,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 17:16:44,733 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash -435719099, now seen corresponding path program 1 times [2022-03-20 17:16:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804600081] [2022-03-20 17:16:44,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash -435719099, now seen corresponding path program 2 times [2022-03-20 17:16:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:44,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030650288] [2022-03-20 17:16:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:44,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:44,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030650288] [2022-03-20 17:16:44,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030650288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804600081] [2022-03-20 17:16:44,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804600081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646059931] [2022-03-20 17:16:44,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:44,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:44,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:44,759 INFO L87 Difference]: Start difference. First operand 689 states and 1207 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) [2022-03-20 17:16:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:44,874 INFO L93 Difference]: Finished difference Result 1033 states and 1805 transitions. [2022-03-20 17:16:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:44,874 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 [2022-03-20 17:16:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:44,876 INFO L225 Difference]: With dead ends: 1033 [2022-03-20 17:16:44,876 INFO L226 Difference]: Without dead ends: 699 [2022-03-20 17:16:44,877 INFO L912 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 [2022-03-20 17:16:44,877 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:44,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-20 17:16:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-03-20 17:16:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7373737373737375) internal successors, (1204), 693 states have internal predecessors, (1204), 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) [2022-03-20 17:16:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1207 transitions. [2022-03-20 17:16:44,915 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1207 transitions. Word has length 29 [2022-03-20 17:16:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:44,916 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 1207 transitions. [2022-03-20 17:16:44,916 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) [2022-03-20 17:16:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1207 transitions. [2022-03-20 17:16:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:16:44,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:44,917 INFO L499 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] [2022-03-20 17:16:44,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 17:16:44,917 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1865103491, now seen corresponding path program 1 times [2022-03-20 17:16:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166392393] [2022-03-20 17:16:44,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1865103491, now seen corresponding path program 2 times [2022-03-20 17:16:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:44,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78938232] [2022-03-20 17:16:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:44,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:44,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:44,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78938232] [2022-03-20 17:16:44,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78938232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:44,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166392393] [2022-03-20 17:16:44,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166392393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:44,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:44,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:44,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62145658] [2022-03-20 17:16:44,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:44,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:44,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:44,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:44,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:44,944 INFO L87 Difference]: Start difference. First operand 697 states and 1207 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) [2022-03-20 17:16:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:45,083 INFO L93 Difference]: Finished difference Result 1293 states and 2273 transitions. [2022-03-20 17:16:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:45,083 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 [2022-03-20 17:16:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:45,087 INFO L225 Difference]: With dead ends: 1293 [2022-03-20 17:16:45,087 INFO L226 Difference]: Without dead ends: 1291 [2022-03-20 17:16:45,088 INFO L912 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 [2022-03-20 17:16:45,088 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 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 [2022-03-20 17:16:45,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-03-20 17:16:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-03-20 17:16:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.7036269430051814) internal successors, (1644), 965 states have internal predecessors, (1644), 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) [2022-03-20 17:16:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1647 transitions. [2022-03-20 17:16:45,142 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1647 transitions. Word has length 29 [2022-03-20 17:16:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:45,142 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1647 transitions. [2022-03-20 17:16:45,142 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) [2022-03-20 17:16:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1647 transitions. [2022-03-20 17:16:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:16:45,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:45,143 INFO L499 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] [2022-03-20 17:16:45,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 17:16:45,144 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 276755589, now seen corresponding path program 1 times [2022-03-20 17:16:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:45,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187621534] [2022-03-20 17:16:45,144 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 276755589, now seen corresponding path program 2 times [2022-03-20 17:16:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:45,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475974288] [2022-03-20 17:16:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:45,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:45,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:45,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475974288] [2022-03-20 17:16:45,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475974288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:45,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:45,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:45,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187621534] [2022-03-20 17:16:45,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187621534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:45,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:45,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:45,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689802105] [2022-03-20 17:16:45,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:45,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:45,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:45,173 INFO L87 Difference]: Start difference. First operand 969 states and 1647 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) [2022-03-20 17:16:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:45,347 INFO L93 Difference]: Finished difference Result 2301 states and 3937 transitions. [2022-03-20 17:16:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:45,348 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 [2022-03-20 17:16:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:45,352 INFO L225 Difference]: With dead ends: 2301 [2022-03-20 17:16:45,352 INFO L226 Difference]: Without dead ends: 1355 [2022-03-20 17:16:45,354 INFO L912 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 [2022-03-20 17:16:45,354 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 135 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 [2022-03-20 17:16:45,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 135 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-03-20 17:16:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-03-20 17:16:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.6990363232023722) internal successors, (2292), 1349 states have internal predecessors, (2292), 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) [2022-03-20 17:16:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2295 transitions. [2022-03-20 17:16:45,435 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2295 transitions. Word has length 29 [2022-03-20 17:16:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:45,435 INFO L478 AbstractCegarLoop]: Abstraction has 1353 states and 2295 transitions. [2022-03-20 17:16:45,435 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) [2022-03-20 17:16:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2295 transitions. [2022-03-20 17:16:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:16:45,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:45,436 INFO L499 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] [2022-03-20 17:16:45,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 17:16:45,436 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:45,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1983846824, now seen corresponding path program 1 times [2022-03-20 17:16:45,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:45,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [51379517] [2022-03-20 17:16:45,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:45,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1983846824, now seen corresponding path program 2 times [2022-03-20 17:16:45,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:45,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330413876] [2022-03-20 17:16:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:45,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:45,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:45,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330413876] [2022-03-20 17:16:45,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330413876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:45,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:45,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:45,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [51379517] [2022-03-20 17:16:45,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [51379517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:45,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:45,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:45,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559739982] [2022-03-20 17:16:45,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:45,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:45,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:45,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:45,458 INFO L87 Difference]: Start difference. First operand 1353 states and 2295 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) [2022-03-20 17:16:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:45,615 INFO L93 Difference]: Finished difference Result 2029 states and 3433 transitions. [2022-03-20 17:16:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:45,616 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 [2022-03-20 17:16:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:45,619 INFO L225 Difference]: With dead ends: 2029 [2022-03-20 17:16:45,619 INFO L226 Difference]: Without dead ends: 1371 [2022-03-20 17:16:45,621 INFO L912 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 [2022-03-20 17:16:45,621 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 141 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 [2022-03-20 17:16:45,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 141 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-03-20 17:16:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-03-20 17:16:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6791208791208792) internal successors, (2292), 1365 states have internal predecessors, (2292), 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) [2022-03-20 17:16:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2295 transitions. [2022-03-20 17:16:45,715 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2295 transitions. Word has length 30 [2022-03-20 17:16:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:45,715 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 2295 transitions. [2022-03-20 17:16:45,715 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) [2022-03-20 17:16:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2295 transitions. [2022-03-20 17:16:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:16:45,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:45,717 INFO L499 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] [2022-03-20 17:16:45,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 17:16:45,718 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:45,718 INFO L85 PathProgramCache]: Analyzing trace with hash -10297882, now seen corresponding path program 1 times [2022-03-20 17:16:45,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:45,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2132302123] [2022-03-20 17:16:45,720 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:45,720 INFO L85 PathProgramCache]: Analyzing trace with hash -10297882, now seen corresponding path program 2 times [2022-03-20 17:16:45,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:45,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707038568] [2022-03-20 17:16:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:45,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:45,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:45,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:45,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707038568] [2022-03-20 17:16:45,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707038568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:45,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:45,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:45,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:45,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2132302123] [2022-03-20 17:16:45,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2132302123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:45,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:45,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463544664] [2022-03-20 17:16:45,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:45,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:45,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:45,752 INFO L87 Difference]: Start difference. First operand 1369 states and 2295 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) [2022-03-20 17:16:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:45,956 INFO L93 Difference]: Finished difference Result 2509 states and 4281 transitions. [2022-03-20 17:16:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:45,956 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 [2022-03-20 17:16:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:45,964 INFO L225 Difference]: With dead ends: 2509 [2022-03-20 17:16:45,964 INFO L226 Difference]: Without dead ends: 2507 [2022-03-20 17:16:45,966 INFO L912 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 [2022-03-20 17:16:45,967 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 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 [2022-03-20 17:16:45,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-03-20 17:16:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-03-20 17:16:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6394805194805195) internal successors, (3156), 1925 states have internal predecessors, (3156), 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) [2022-03-20 17:16:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3159 transitions. [2022-03-20 17:16:46,119 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3159 transitions. Word has length 30 [2022-03-20 17:16:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:46,119 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 3159 transitions. [2022-03-20 17:16:46,119 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) [2022-03-20 17:16:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3159 transitions. [2022-03-20 17:16:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:16:46,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:46,121 INFO L499 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] [2022-03-20 17:16:46,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 17:16:46,121 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1598645784, now seen corresponding path program 1 times [2022-03-20 17:16:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:46,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1510992968] [2022-03-20 17:16:46,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:46,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1598645784, now seen corresponding path program 2 times [2022-03-20 17:16:46,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:46,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202568706] [2022-03-20 17:16:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:46,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:46,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:46,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:46,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202568706] [2022-03-20 17:16:46,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202568706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:46,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:46,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:46,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:46,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1510992968] [2022-03-20 17:16:46,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1510992968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:46,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:46,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:46,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461145423] [2022-03-20 17:16:46,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:46,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:46,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:46,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:46,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:46,143 INFO L87 Difference]: Start difference. First operand 1929 states and 3159 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) [2022-03-20 17:16:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:46,390 INFO L93 Difference]: Finished difference Result 4557 states and 7513 transitions. [2022-03-20 17:16:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:46,390 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 [2022-03-20 17:16:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:46,397 INFO L225 Difference]: With dead ends: 4557 [2022-03-20 17:16:46,398 INFO L226 Difference]: Without dead ends: 2667 [2022-03-20 17:16:46,401 INFO L912 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 [2022-03-20 17:16:46,401 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 137 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 [2022-03-20 17:16:46,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-03-20 17:16:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-03-20 17:16:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.636978579481398) internal successors, (4356), 2661 states have internal predecessors, (4356), 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) [2022-03-20 17:16:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4359 transitions. [2022-03-20 17:16:46,593 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4359 transitions. Word has length 30 [2022-03-20 17:16:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:46,594 INFO L478 AbstractCegarLoop]: Abstraction has 2665 states and 4359 transitions. [2022-03-20 17:16:46,594 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) [2022-03-20 17:16:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4359 transitions. [2022-03-20 17:16:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:16:46,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:46,596 INFO L499 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] [2022-03-20 17:16:46,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 17:16:46,596 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:46,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash -319020550, now seen corresponding path program 1 times [2022-03-20 17:16:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:46,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854416286] [2022-03-20 17:16:46,597 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash -319020550, now seen corresponding path program 2 times [2022-03-20 17:16:46,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:46,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83792770] [2022-03-20 17:16:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:46,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:46,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:46,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83792770] [2022-03-20 17:16:46,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83792770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:46,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:46,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:46,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:46,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854416286] [2022-03-20 17:16:46,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854416286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:46,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:46,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:46,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542844069] [2022-03-20 17:16:46,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:46,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:46,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:46,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:46,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:46,640 INFO L87 Difference]: Start difference. First operand 2665 states and 4359 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) [2022-03-20 17:16:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:46,862 INFO L93 Difference]: Finished difference Result 3997 states and 6521 transitions. [2022-03-20 17:16:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:46,863 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 [2022-03-20 17:16:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:46,870 INFO L225 Difference]: With dead ends: 3997 [2022-03-20 17:16:46,870 INFO L226 Difference]: Without dead ends: 2699 [2022-03-20 17:16:46,873 INFO L912 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 [2022-03-20 17:16:46,873 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:46,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-20 17:16:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-03-20 17:16:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.617526921648719) internal successors, (4356), 2693 states have internal predecessors, (4356), 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) [2022-03-20 17:16:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4359 transitions. [2022-03-20 17:16:47,062 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4359 transitions. Word has length 31 [2022-03-20 17:16:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:47,062 INFO L478 AbstractCegarLoop]: Abstraction has 2697 states and 4359 transitions. [2022-03-20 17:16:47,062 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) [2022-03-20 17:16:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4359 transitions. [2022-03-20 17:16:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:16:47,064 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:47,064 INFO L499 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] [2022-03-20 17:16:47,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 17:16:47,064 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1981802040, now seen corresponding path program 1 times [2022-03-20 17:16:47,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:47,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [525985029] [2022-03-20 17:16:47,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1981802040, now seen corresponding path program 2 times [2022-03-20 17:16:47,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:47,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756953901] [2022-03-20 17:16:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:47,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:47,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:47,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:47,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756953901] [2022-03-20 17:16:47,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756953901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:47,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:47,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:47,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:47,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [525985029] [2022-03-20 17:16:47,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [525985029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:47,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:47,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:47,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820797690] [2022-03-20 17:16:47,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:47,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:47,101 INFO L87 Difference]: Start difference. First operand 2697 states and 4359 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) [2022-03-20 17:16:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:47,490 INFO L93 Difference]: Finished difference Result 4877 states and 8041 transitions. [2022-03-20 17:16:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:47,491 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 [2022-03-20 17:16:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:47,503 INFO L225 Difference]: With dead ends: 4877 [2022-03-20 17:16:47,503 INFO L226 Difference]: Without dead ends: 4875 [2022-03-20 17:16:47,504 INFO L912 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 [2022-03-20 17:16:47,505 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:47,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-20 17:16:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-03-20 17:16:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5739921976592979) internal successors, (6052), 3845 states have internal predecessors, (6052), 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) [2022-03-20 17:16:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 6055 transitions. [2022-03-20 17:16:47,790 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 6055 transitions. Word has length 31 [2022-03-20 17:16:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:47,791 INFO L478 AbstractCegarLoop]: Abstraction has 3849 states and 6055 transitions. [2022-03-20 17:16:47,791 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) [2022-03-20 17:16:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 6055 transitions. [2022-03-20 17:16:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:16:47,794 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:47,794 INFO L499 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] [2022-03-20 17:16:47,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 17:16:47,794 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 393454138, now seen corresponding path program 1 times [2022-03-20 17:16:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308247970] [2022-03-20 17:16:47,795 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash 393454138, now seen corresponding path program 2 times [2022-03-20 17:16:47,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110965911] [2022-03-20 17:16:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:47,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:47,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:47,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:47,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110965911] [2022-03-20 17:16:47,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110965911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:47,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:47,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:47,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308247970] [2022-03-20 17:16:47,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308247970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:47,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:47,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:47,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367591497] [2022-03-20 17:16:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:47,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:47,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:47,835 INFO L87 Difference]: Start difference. First operand 3849 states and 6055 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) [2022-03-20 17:16:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:48,265 INFO L93 Difference]: Finished difference Result 9037 states and 14313 transitions. [2022-03-20 17:16:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:48,265 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 [2022-03-20 17:16:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:48,278 INFO L225 Difference]: With dead ends: 9037 [2022-03-20 17:16:48,278 INFO L226 Difference]: Without dead ends: 5259 [2022-03-20 17:16:48,285 INFO L912 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 [2022-03-20 17:16:48,285 INFO L913 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:48,285 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-20 17:16:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-03-20 17:16:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5724347991623835) internal successors, (8260), 5253 states have internal predecessors, (8260), 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) [2022-03-20 17:16:48,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8263 transitions. [2022-03-20 17:16:48,661 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8263 transitions. Word has length 31 [2022-03-20 17:16:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:48,661 INFO L478 AbstractCegarLoop]: Abstraction has 5257 states and 8263 transitions. [2022-03-20 17:16:48,662 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) [2022-03-20 17:16:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8263 transitions. [2022-03-20 17:16:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:16:48,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:48,667 INFO L499 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] [2022-03-20 17:16:48,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 17:16:48,667 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:48,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1306535229, now seen corresponding path program 1 times [2022-03-20 17:16:48,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:48,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640407544] [2022-03-20 17:16:48,667 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1306535229, now seen corresponding path program 2 times [2022-03-20 17:16:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:48,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106216822] [2022-03-20 17:16:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:48,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:48,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:48,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106216822] [2022-03-20 17:16:48,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106216822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:48,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:48,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:48,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:48,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640407544] [2022-03-20 17:16:48,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640407544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:48,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:48,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664176091] [2022-03-20 17:16:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:48,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:48,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:48,689 INFO L87 Difference]: Start difference. First operand 5257 states and 8263 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) [2022-03-20 17:16:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:49,203 INFO L93 Difference]: Finished difference Result 7885 states and 12361 transitions. [2022-03-20 17:16:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:49,204 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 [2022-03-20 17:16:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:49,213 INFO L225 Difference]: With dead ends: 7885 [2022-03-20 17:16:49,213 INFO L226 Difference]: Without dead ends: 5323 [2022-03-20 17:16:49,219 INFO L912 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 [2022-03-20 17:16:49,219 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:49,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-03-20 17:16:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-03-20 17:16:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.5535076170772992) internal successors, (8260), 5317 states have internal predecessors, (8260), 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) [2022-03-20 17:16:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8263 transitions. [2022-03-20 17:16:49,614 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8263 transitions. Word has length 32 [2022-03-20 17:16:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:49,614 INFO L478 AbstractCegarLoop]: Abstraction has 5321 states and 8263 transitions. [2022-03-20 17:16:49,614 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) [2022-03-20 17:16:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8263 transitions. [2022-03-20 17:16:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:16:49,618 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:49,618 INFO L499 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] [2022-03-20 17:16:49,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 17:16:49,627 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash -687609477, now seen corresponding path program 1 times [2022-03-20 17:16:49,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:49,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [816480543] [2022-03-20 17:16:49,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -687609477, now seen corresponding path program 2 times [2022-03-20 17:16:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:49,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797254753] [2022-03-20 17:16:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:49,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:49,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:49,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:49,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797254753] [2022-03-20 17:16:49,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797254753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:49,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:49,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:49,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:49,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [816480543] [2022-03-20 17:16:49,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [816480543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:49,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:49,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:49,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206927530] [2022-03-20 17:16:49,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:49,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:49,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:49,649 INFO L87 Difference]: Start difference. First operand 5321 states and 8263 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) [2022-03-20 17:16:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:50,370 INFO L93 Difference]: Finished difference Result 9485 states and 15049 transitions. [2022-03-20 17:16:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:50,371 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 [2022-03-20 17:16:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:50,388 INFO L225 Difference]: With dead ends: 9485 [2022-03-20 17:16:50,388 INFO L226 Difference]: Without dead ends: 9483 [2022-03-20 17:16:50,391 INFO L912 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 [2022-03-20 17:16:50,391 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 95 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 [2022-03-20 17:16:50,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-03-20 17:16:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-03-20 17:16:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.5078724788549123) internal successors, (11588), 7685 states have internal predecessors, (11588), 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) [2022-03-20 17:16:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11591 transitions. [2022-03-20 17:16:50,997 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11591 transitions. Word has length 32 [2022-03-20 17:16:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:50,997 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 11591 transitions. [2022-03-20 17:16:50,998 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) [2022-03-20 17:16:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11591 transitions. [2022-03-20 17:16:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:16:51,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:51,006 INFO L499 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] [2022-03-20 17:16:51,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 17:16:51,006 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2019009917, now seen corresponding path program 1 times [2022-03-20 17:16:51,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:51,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536666417] [2022-03-20 17:16:51,007 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:51,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2019009917, now seen corresponding path program 2 times [2022-03-20 17:16:51,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:51,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972868728] [2022-03-20 17:16:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:51,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:51,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:51,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:51,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972868728] [2022-03-20 17:16:51,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972868728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:51,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:51,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:51,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:51,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536666417] [2022-03-20 17:16:51,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536666417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:51,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:51,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196957221] [2022-03-20 17:16:51,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:51,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:51,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:51,033 INFO L87 Difference]: Start difference. First operand 7689 states and 11591 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) [2022-03-20 17:16:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:51,999 INFO L93 Difference]: Finished difference Result 17933 states and 27209 transitions. [2022-03-20 17:16:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:52,001 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 [2022-03-20 17:16:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:52,019 INFO L225 Difference]: With dead ends: 17933 [2022-03-20 17:16:52,019 INFO L226 Difference]: Without dead ends: 10379 [2022-03-20 17:16:52,032 INFO L912 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 [2022-03-20 17:16:52,032 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:52,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-03-20 17:16:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-03-20 17:16:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.5058324496288442) internal successors, (15620), 10373 states have internal predecessors, (15620), 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) [2022-03-20 17:16:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15623 transitions. [2022-03-20 17:16:52,858 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15623 transitions. Word has length 32 [2022-03-20 17:16:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:52,859 INFO L478 AbstractCegarLoop]: Abstraction has 10377 states and 15623 transitions. [2022-03-20 17:16:52,859 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) [2022-03-20 17:16:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15623 transitions. [2022-03-20 17:16:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:16:52,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:52,866 INFO L499 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] [2022-03-20 17:16:52,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 17:16:52,866 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:52,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 159157167, now seen corresponding path program 1 times [2022-03-20 17:16:52,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:52,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [251710369] [2022-03-20 17:16:52,866 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash 159157167, now seen corresponding path program 2 times [2022-03-20 17:16:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:52,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394369647] [2022-03-20 17:16:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:52,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:52,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:52,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394369647] [2022-03-20 17:16:52,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394369647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:52,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:52,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:52,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [251710369] [2022-03-20 17:16:52,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [251710369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:52,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:52,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:52,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630002690] [2022-03-20 17:16:52,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:52,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:52,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:52,884 INFO L87 Difference]: Start difference. First operand 10377 states and 15623 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) [2022-03-20 17:16:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:53,811 INFO L93 Difference]: Finished difference Result 15565 states and 23369 transitions. [2022-03-20 17:16:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:53,811 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 [2022-03-20 17:16:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:53,830 INFO L225 Difference]: With dead ends: 15565 [2022-03-20 17:16:53,830 INFO L226 Difference]: Without dead ends: 10507 [2022-03-20 17:16:53,841 INFO L912 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 [2022-03-20 17:16:53,841 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:53,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-03-20 17:16:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-03-20 17:16:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4874773831063708) internal successors, (15620), 10501 states have internal predecessors, (15620), 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) [2022-03-20 17:16:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15623 transitions. [2022-03-20 17:16:54,764 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15623 transitions. Word has length 33 [2022-03-20 17:16:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:54,764 INFO L478 AbstractCegarLoop]: Abstraction has 10505 states and 15623 transitions. [2022-03-20 17:16:54,764 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) [2022-03-20 17:16:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15623 transitions. [2022-03-20 17:16:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:16:54,772 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:54,772 INFO L499 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] [2022-03-20 17:16:54,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 17:16:54,772 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1834987539, now seen corresponding path program 1 times [2022-03-20 17:16:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:54,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2047073175] [2022-03-20 17:16:54,773 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1834987539, now seen corresponding path program 2 times [2022-03-20 17:16:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:54,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823392434] [2022-03-20 17:16:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:54,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:54,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823392434] [2022-03-20 17:16:54,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823392434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:54,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:54,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:54,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:54,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2047073175] [2022-03-20 17:16:54,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2047073175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:54,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:54,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:54,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294128623] [2022-03-20 17:16:54,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:54,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:54,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:54,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:54,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:54,794 INFO L87 Difference]: Start difference. First operand 10505 states and 15623 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) [2022-03-20 17:16:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:56,453 INFO L93 Difference]: Finished difference Result 18445 states and 28041 transitions. [2022-03-20 17:16:56,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:56,455 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 [2022-03-20 17:16:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:56,483 INFO L225 Difference]: With dead ends: 18445 [2022-03-20 17:16:56,483 INFO L226 Difference]: Without dead ends: 18443 [2022-03-20 17:16:56,489 INFO L912 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 [2022-03-20 17:16:56,489 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:56,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-03-20 17:16:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-03-20 17:16:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4414578587699316) internal successors, (22148), 15365 states have internal predecessors, (22148), 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) [2022-03-20 17:16:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 22151 transitions. [2022-03-20 17:16:57,779 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 22151 transitions. Word has length 33 [2022-03-20 17:16:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:16:57,779 INFO L478 AbstractCegarLoop]: Abstraction has 15369 states and 22151 transitions. [2022-03-20 17:16:57,779 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) [2022-03-20 17:16:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 22151 transitions. [2022-03-20 17:16:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:16:57,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:16:57,791 INFO L499 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] [2022-03-20 17:16:57,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 17:16:57,791 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:16:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:16:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 871631855, now seen corresponding path program 1 times [2022-03-20 17:16:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:57,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [673182975] [2022-03-20 17:16:57,792 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:16:57,792 INFO L85 PathProgramCache]: Analyzing trace with hash 871631855, now seen corresponding path program 2 times [2022-03-20 17:16:57,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:16:57,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668166012] [2022-03-20 17:16:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:16:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:16:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:57,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:16:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:16:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:16:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:16:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668166012] [2022-03-20 17:16:57,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668166012] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:57,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:57,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:57,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:16:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [673182975] [2022-03-20 17:16:57,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [673182975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:16:57,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:16:57,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:16:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843747240] [2022-03-20 17:16:57,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:16:57,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:16:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:16:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:16:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:16:57,817 INFO L87 Difference]: Start difference. First operand 15369 states and 22151 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) [2022-03-20 17:16:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:16:59,514 INFO L93 Difference]: Finished difference Result 35597 states and 51593 transitions. [2022-03-20 17:16:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:16:59,515 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 [2022-03-20 17:16:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:16:59,545 INFO L225 Difference]: With dead ends: 35597 [2022-03-20 17:16:59,545 INFO L226 Difference]: Without dead ends: 20491 [2022-03-20 17:16:59,573 INFO L912 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 [2022-03-20 17:16:59,574 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:16:59,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:16:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-03-20 17:17:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-03-20 17:17:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.437344398340249) internal successors, (29444), 20485 states have internal predecessors, (29444), 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) [2022-03-20 17:17:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 29447 transitions. [2022-03-20 17:17:01,469 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 29447 transitions. Word has length 33 [2022-03-20 17:17:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:01,469 INFO L478 AbstractCegarLoop]: Abstraction has 20489 states and 29447 transitions. [2022-03-20 17:17:01,469 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) [2022-03-20 17:17:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 29447 transitions. [2022-03-20 17:17:01,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:17:01,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:01,482 INFO L499 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] [2022-03-20 17:17:01,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 17:17:01,482 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:01,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1049824046, now seen corresponding path program 1 times [2022-03-20 17:17:01,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810707602] [2022-03-20 17:17:01,483 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:01,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1049824046, now seen corresponding path program 2 times [2022-03-20 17:17:01,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439934552] [2022-03-20 17:17:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:01,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:01,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:01,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439934552] [2022-03-20 17:17:01,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439934552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:01,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:01,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:01,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:01,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810707602] [2022-03-20 17:17:01,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810707602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:01,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:01,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:01,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739401516] [2022-03-20 17:17:01,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:01,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:01,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:01,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:01,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:01,511 INFO L87 Difference]: Start difference. First operand 20489 states and 29447 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) [2022-03-20 17:17:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:03,248 INFO L93 Difference]: Finished difference Result 30733 states and 44041 transitions. [2022-03-20 17:17:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:03,249 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 [2022-03-20 17:17:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:03,281 INFO L225 Difference]: With dead ends: 30733 [2022-03-20 17:17:03,281 INFO L226 Difference]: Without dead ends: 20747 [2022-03-20 17:17:03,302 INFO L912 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 [2022-03-20 17:17:03,302 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:03,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 129 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-03-20 17:17:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-03-20 17:17:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.4196036835253845) internal successors, (29444), 20741 states have internal predecessors, (29444), 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) [2022-03-20 17:17:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 29447 transitions. [2022-03-20 17:17:05,106 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 29447 transitions. Word has length 34 [2022-03-20 17:17:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:05,106 INFO L478 AbstractCegarLoop]: Abstraction has 20745 states and 29447 transitions. [2022-03-20 17:17:05,106 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) [2022-03-20 17:17:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 29447 transitions. [2022-03-20 17:17:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:17:05,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:05,121 INFO L499 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] [2022-03-20 17:17:05,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 17:17:05,121 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1250998544, now seen corresponding path program 1 times [2022-03-20 17:17:05,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755985307] [2022-03-20 17:17:05,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1250998544, now seen corresponding path program 2 times [2022-03-20 17:17:05,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:05,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291219167] [2022-03-20 17:17:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:05,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:05,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291219167] [2022-03-20 17:17:05,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291219167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:05,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755985307] [2022-03-20 17:17:05,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755985307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:05,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:05,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643074708] [2022-03-20 17:17:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:05,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:05,157 INFO L87 Difference]: Start difference. First operand 20745 states and 29447 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) [2022-03-20 17:17:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:08,728 INFO L93 Difference]: Finished difference Result 60685 states and 85257 transitions. [2022-03-20 17:17:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:08,729 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 [2022-03-20 17:17:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:08,831 INFO L225 Difference]: With dead ends: 60685 [2022-03-20 17:17:08,832 INFO L226 Difference]: Without dead ends: 40459 [2022-03-20 17:17:08,880 INFO L912 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 [2022-03-20 17:17:08,881 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:08,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 111 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-03-20 17:17:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-03-20 17:17:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3796751786023287) internal successors, (55812), 40453 states have internal predecessors, (55812), 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) [2022-03-20 17:17:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55815 transitions. [2022-03-20 17:17:13,034 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55815 transitions. Word has length 34 [2022-03-20 17:17:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:13,034 INFO L478 AbstractCegarLoop]: Abstraction has 40457 states and 55815 transitions. [2022-03-20 17:17:13,034 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) [2022-03-20 17:17:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55815 transitions. [2022-03-20 17:17:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:17:13,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:13,056 INFO L499 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] [2022-03-20 17:17:13,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 17:17:13,056 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1455620850, now seen corresponding path program 1 times [2022-03-20 17:17:13,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:13,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1649805850] [2022-03-20 17:17:13,057 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1455620850, now seen corresponding path program 2 times [2022-03-20 17:17:13,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:13,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638583062] [2022-03-20 17:17:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:13,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:13,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:13,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638583062] [2022-03-20 17:17:13,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638583062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:13,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:13,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:13,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:13,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1649805850] [2022-03-20 17:17:13,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1649805850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:13,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:13,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:13,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879535467] [2022-03-20 17:17:13,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:13,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:13,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:13,085 INFO L87 Difference]: Start difference. First operand 40457 states and 55815 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) [2022-03-20 17:17:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:17,207 INFO L93 Difference]: Finished difference Result 45581 states and 65033 transitions. [2022-03-20 17:17:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:17,207 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 [2022-03-20 17:17:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:17,288 INFO L225 Difference]: With dead ends: 45581 [2022-03-20 17:17:17,288 INFO L226 Difference]: Without dead ends: 45579 [2022-03-20 17:17:17,306 INFO L912 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 [2022-03-20 17:17:17,306 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:17,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 144 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:17,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45579 states. [2022-03-20 17:17:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45579 to 40457. [2022-03-20 17:17:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3670185153140681) internal successors, (55300), 40453 states have internal predecessors, (55300), 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) [2022-03-20 17:17:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 55303 transitions. [2022-03-20 17:17:21,070 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 55303 transitions. Word has length 34 [2022-03-20 17:17:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:21,070 INFO L478 AbstractCegarLoop]: Abstraction has 40457 states and 55303 transitions. [2022-03-20 17:17:21,070 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) [2022-03-20 17:17:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 55303 transitions. [2022-03-20 17:17:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:17:21,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:21,093 INFO L499 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] [2022-03-20 17:17:21,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 17:17:21,093 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash 126464356, now seen corresponding path program 1 times [2022-03-20 17:17:21,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:21,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412694742] [2022-03-20 17:17:21,094 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 126464356, now seen corresponding path program 2 times [2022-03-20 17:17:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:21,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218638292] [2022-03-20 17:17:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:21,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:21,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:21,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:21,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218638292] [2022-03-20 17:17:21,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218638292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:21,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:21,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:21,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:21,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412694742] [2022-03-20 17:17:21,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412694742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:21,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:21,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:21,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214432099] [2022-03-20 17:17:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:21,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:21,121 INFO L87 Difference]: Start difference. First operand 40457 states and 55303 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) [2022-03-20 17:17:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:27,760 INFO L93 Difference]: Finished difference Result 69133 states and 96265 transitions. [2022-03-20 17:17:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:27,761 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 [2022-03-20 17:17:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:27,881 INFO L225 Difference]: With dead ends: 69133 [2022-03-20 17:17:27,881 INFO L226 Difference]: Without dead ends: 69131 [2022-03-20 17:17:27,903 INFO L912 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 [2022-03-20 17:17:27,904 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:27,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69131 states. [2022-03-20 17:17:33,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69131 to 60937. [2022-03-20 17:17:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60937 states, 60933 states have (on average 1.3276877882264126) internal successors, (80900), 60933 states have internal predecessors, (80900), 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) [2022-03-20 17:17:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60937 states to 60937 states and 80903 transitions. [2022-03-20 17:17:33,886 INFO L78 Accepts]: Start accepts. Automaton has 60937 states and 80903 transitions. Word has length 35 [2022-03-20 17:17:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:33,886 INFO L478 AbstractCegarLoop]: Abstraction has 60937 states and 80903 transitions. [2022-03-20 17:17:33,886 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) [2022-03-20 17:17:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 60937 states and 80903 transitions. [2022-03-20 17:17:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:17:34,080 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:34,080 INFO L499 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] [2022-03-20 17:17:34,080 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 17:17:34,080 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1461883546, now seen corresponding path program 1 times [2022-03-20 17:17:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19106541] [2022-03-20 17:17:34,081 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1461883546, now seen corresponding path program 2 times [2022-03-20 17:17:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075402800] [2022-03-20 17:17:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:34,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:34,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075402800] [2022-03-20 17:17:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075402800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:34,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:34,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:34,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19106541] [2022-03-20 17:17:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19106541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:34,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:34,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469345822] [2022-03-20 17:17:34,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:34,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:34,102 INFO L87 Difference]: Start difference. First operand 60937 states and 80903 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) [2022-03-20 17:17:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:41,499 INFO L93 Difference]: Finished difference Result 139789 states and 186377 transitions. [2022-03-20 17:17:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:41,499 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 [2022-03-20 17:17:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:41,639 INFO L225 Difference]: With dead ends: 139789 [2022-03-20 17:17:41,639 INFO L226 Difference]: Without dead ends: 79371 [2022-03-20 17:17:41,730 INFO L912 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 [2022-03-20 17:17:41,731 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:41,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79371 states. [2022-03-20 17:17:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79371 to 79369. [2022-03-20 17:17:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79369 states, 79365 states have (on average 1.3160965160965161) internal successors, (104452), 79365 states have internal predecessors, (104452), 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) [2022-03-20 17:17:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79369 states to 79369 states and 104455 transitions. [2022-03-20 17:17:49,562 INFO L78 Accepts]: Start accepts. Automaton has 79369 states and 104455 transitions. Word has length 35 [2022-03-20 17:17:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:17:49,563 INFO L478 AbstractCegarLoop]: Abstraction has 79369 states and 104455 transitions. [2022-03-20 17:17:49,563 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) [2022-03-20 17:17:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 79369 states and 104455 transitions. [2022-03-20 17:17:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:17:49,603 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:17:49,603 INFO L499 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] [2022-03-20 17:17:49,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 17:17:49,604 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:17:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:17:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash -374356763, now seen corresponding path program 1 times [2022-03-20 17:17:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889867909] [2022-03-20 17:17:49,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:17:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash -374356763, now seen corresponding path program 2 times [2022-03-20 17:17:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:17:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461138645] [2022-03-20 17:17:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:17:49,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:17:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:49,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:17:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:17:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:17:49,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:17:49,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461138645] [2022-03-20 17:17:49,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461138645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:49,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:49,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:49,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:17:49,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889867909] [2022-03-20 17:17:49,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889867909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:17:49,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:17:49,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:17:49,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806748161] [2022-03-20 17:17:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:17:49,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:17:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:17:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:17:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:17:49,625 INFO L87 Difference]: Start difference. First operand 79369 states and 104455 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) [2022-03-20 17:17:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:17:57,655 INFO L93 Difference]: Finished difference Result 119821 states and 157705 transitions. [2022-03-20 17:17:57,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:17:57,655 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 [2022-03-20 17:17:57,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:17:57,805 INFO L225 Difference]: With dead ends: 119821 [2022-03-20 17:17:57,805 INFO L226 Difference]: Without dead ends: 80907 [2022-03-20 17:17:57,869 INFO L912 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 [2022-03-20 17:17:57,869 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:17:57,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:17:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-03-20 17:18:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-03-20 17:18:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.3037663316893486) internal successors, (105476), 80901 states have internal predecessors, (105476), 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) [2022-03-20 17:18:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 105479 transitions. [2022-03-20 17:18:05,982 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 105479 transitions. Word has length 36 [2022-03-20 17:18:05,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:18:05,982 INFO L478 AbstractCegarLoop]: Abstraction has 80905 states and 105479 transitions. [2022-03-20 17:18:05,982 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) [2022-03-20 17:18:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 105479 transitions. [2022-03-20 17:18:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:18:06,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:18:06,033 INFO L499 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] [2022-03-20 17:18:06,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 17:18:06,034 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:18:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:18:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465827, now seen corresponding path program 1 times [2022-03-20 17:18:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:06,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1814423621] [2022-03-20 17:18:06,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:18:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1926465827, now seen corresponding path program 2 times [2022-03-20 17:18:06,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:18:06,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163345915] [2022-03-20 17:18:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:18:06,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:18:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:18:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:18:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:18:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163345915] [2022-03-20 17:18:06,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163345915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:06,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:06,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:06,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:18:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1814423621] [2022-03-20 17:18:06,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1814423621] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:06,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:06,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:06,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525590628] [2022-03-20 17:18:06,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:18:06,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:18:06,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:18:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:18:06,063 INFO L87 Difference]: Start difference. First operand 80905 states and 105479 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) [2022-03-20 17:18:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:18:19,495 INFO L93 Difference]: Finished difference Result 135181 states and 178185 transitions. [2022-03-20 17:18:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:18:19,495 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 [2022-03-20 17:18:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:18:19,993 INFO L225 Difference]: With dead ends: 135181 [2022-03-20 17:18:19,993 INFO L226 Difference]: Without dead ends: 135179 [2022-03-20 17:18:20,042 INFO L912 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 [2022-03-20 17:18:20,042 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:18:20,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:18:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-03-20 17:18:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-03-20 17:18:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2666476787240102) internal successors, (155652), 122885 states have internal predecessors, (155652), 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) [2022-03-20 17:18:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 155655 transitions. [2022-03-20 17:18:33,229 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 155655 transitions. Word has length 36 [2022-03-20 17:18:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:18:33,229 INFO L478 AbstractCegarLoop]: Abstraction has 122889 states and 155655 transitions. [2022-03-20 17:18:33,229 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) [2022-03-20 17:18:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 155655 transitions. [2022-03-20 17:18:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:18:33,335 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:18:33,335 INFO L499 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] [2022-03-20 17:18:33,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 17:18:33,335 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:18:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:18:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash 338117925, now seen corresponding path program 1 times [2022-03-20 17:18:33,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:33,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1207855823] [2022-03-20 17:18:33,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:18:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash 338117925, now seen corresponding path program 2 times [2022-03-20 17:18:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:18:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491314715] [2022-03-20 17:18:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:18:33,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:18:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:33,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:18:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:18:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:18:33,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:18:33,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491314715] [2022-03-20 17:18:33,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491314715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:33,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:33,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:33,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:18:33,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1207855823] [2022-03-20 17:18:33,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1207855823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:18:33,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:18:33,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:18:33,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821474035] [2022-03-20 17:18:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:18:33,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:18:33,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:18:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:18:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:18:33,360 INFO L87 Difference]: Start difference. First operand 122889 states and 155655 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) [2022-03-20 17:18:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:18:49,600 INFO L93 Difference]: Finished difference Result 278541 states and 352265 transitions. [2022-03-20 17:18:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:18:49,600 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 [2022-03-20 17:18:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:18:50,021 INFO L225 Difference]: With dead ends: 278541 [2022-03-20 17:18:50,021 INFO L226 Difference]: Without dead ends: 157707 [2022-03-20 17:18:50,184 INFO L912 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 [2022-03-20 17:18:50,184 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:18:50,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:18:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-03-20 17:19:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-03-20 17:19:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157705 states, 157701 states have (on average 1.246739082187177) internal successors, (196612), 157701 states have internal predecessors, (196612), 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) [2022-03-20 17:19:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 196615 transitions. [2022-03-20 17:19:06,880 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 196615 transitions. Word has length 36 [2022-03-20 17:19:06,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:19:06,880 INFO L478 AbstractCegarLoop]: Abstraction has 157705 states and 196615 transitions. [2022-03-20 17:19:06,880 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) [2022-03-20 17:19:06,880 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 196615 transitions. [2022-03-20 17:19:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 17:19:07,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:19:07,005 INFO L499 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] [2022-03-20 17:19:07,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 17:19:07,005 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:19:07,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:19:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash -408885669, now seen corresponding path program 1 times [2022-03-20 17:19:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:19:07,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2043669893] [2022-03-20 17:19:07,005 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:19:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash -408885669, now seen corresponding path program 2 times [2022-03-20 17:19:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:19:07,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265886960] [2022-03-20 17:19:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:19:07,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:19:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:19:07,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:19:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:19:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:19:07,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:19:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265886960] [2022-03-20 17:19:07,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265886960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:19:07,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:19:07,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:19:07,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:19:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2043669893] [2022-03-20 17:19:07,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2043669893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:19:07,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:19:07,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:19:07,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068575556] [2022-03-20 17:19:07,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:19:07,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:19:07,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:19:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:19:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:19:07,027 INFO L87 Difference]: Start difference. First operand 157705 states and 196615 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)