/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_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:59:10,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:59:10,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:59:10,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:59:10,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:59:10,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:59:10,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:59:10,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:59:10,935 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:59:10,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:59:10,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:59:10,937 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:59:10,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:59:10,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:59:10,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:59:10,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:59:10,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:59:10,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:59:10,938 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:59:10,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:59:10,938 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:59:10,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:59:10,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:59:10,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:59:10,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:59:10,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:59:10,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:59:10,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:59:10,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:59:10,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:59:10,939 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:59:10,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:59:11,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:59:11,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:59:11,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:59:11,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:59:11,174 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:59:11,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2022-02-24 01:59:11,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5d40f3c/c4ce8a94489647b58dd32fbdf6c193ae/FLAG23d025f60 [2022-02-24 01:59:11,565 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:59:11,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2022-02-24 01:59:11,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5d40f3c/c4ce8a94489647b58dd32fbdf6c193ae/FLAG23d025f60 [2022-02-24 01:59:11,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d5d40f3c/c4ce8a94489647b58dd32fbdf6c193ae [2022-02-24 01:59:11,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:59:11,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:59:11,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:59:11,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:59:11,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:59:11,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b62ede1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11, skipping insertion in model container [2022-02-24 01:59:11,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:59:11,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:59:11,757 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_12.c[4591,4604] [2022-02-24 01:59:11,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:59:11,764 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:59:11,785 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_12.c[4591,4604] [2022-02-24 01:59:11,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:59:11,795 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:59:11,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11 WrapperNode [2022-02-24 01:59:11,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:59:11,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:59:11,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:59:11,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:59:11,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:59:11,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:59:11,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:59:11,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:59:11,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (1/1) ... [2022-02-24 01:59:11,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:59:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:59:11,865 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) [2022-02-24 01:59:11,881 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 [2022-02-24 01:59:11,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:59:11,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:59:11,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:59:11,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:59:11,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:59:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:59:11,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:59:11,948 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:59:11,950 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:59:12,090 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:59:12,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:59:12,095 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:59:12,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:59:12 BoogieIcfgContainer [2022-02-24 01:59:12,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:59:12,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:59:12,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:59:12,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:59:12,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:59:11" (1/3) ... [2022-02-24 01:59:12,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c992f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:59:12, skipping insertion in model container [2022-02-24 01:59:12,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:11" (2/3) ... [2022-02-24 01:59:12,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c992f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:59:12, skipping insertion in model container [2022-02-24 01:59:12,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:59:12" (3/3) ... [2022-02-24 01:59:12,102 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2022-02-24 01:59:12,106 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:59:12,106 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:59:12,133 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:59:12,138 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=JORDAN [2022-02-24 01:59:12,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:59:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 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) [2022-02-24 01:59:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:59:12,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:12,153 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash 88534809, now seen corresponding path program 1 times [2022-02-24 01:59:12,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559009977] [2022-02-24 01:59:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,206 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:12,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559009977] [2022-02-24 01:59:12,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [559009977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350377137] [2022-02-24 01:59:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,417 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 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 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-24 01:59:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,651 INFO L93 Difference]: Finished difference Result 100 states and 175 transitions. [2022-02-24 01:59:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-02-24 01:59:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,663 INFO L225 Difference]: With dead ends: 100 [2022-02-24 01:59:12,663 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 01:59:12,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:12,682 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 208 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:12,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:59:12,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 01:59:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-02-24 01:59:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 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) [2022-02-24 01:59:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2022-02-24 01:59:12,734 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 23 [2022-02-24 01:59:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,735 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2022-02-24 01:59:12,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-24 01:59:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2022-02-24 01:59:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:59:12,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:12,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:59:12,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1191328869, now seen corresponding path program 1 times [2022-02-24 01:59:12,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426029476] [2022-02-24 01:59:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,741 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:12,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426029476] [2022-02-24 01:59:12,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [426029476] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875329038] [2022-02-24 01:59:12,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,834 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-24 01:59:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,950 INFO L93 Difference]: Finished difference Result 138 states and 253 transitions. [2022-02-24 01:59:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-02-24 01:59:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,952 INFO L225 Difference]: With dead ends: 138 [2022-02-24 01:59:12,952 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 01:59:12,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:12,954 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:12,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 01:59:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-02-24 01:59:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 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) [2022-02-24 01:59:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2022-02-24 01:59:12,970 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 23 [2022-02-24 01:59:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,970 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 150 transitions. [2022-02-24 01:59:12,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-24 01:59:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 150 transitions. [2022-02-24 01:59:12,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:59:12,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:12,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:59:12,972 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1550175482, now seen corresponding path program 1 times [2022-02-24 01:59:12,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275044997] [2022-02-24 01:59:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,975 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:13,066 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275044997] [2022-02-24 01:59:13,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [275044997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247237688] [2022-02-24 01:59:13,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,069 INFO L87 Difference]: Start difference. First operand 83 states and 150 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:59:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,178 INFO L93 Difference]: Finished difference Result 127 states and 226 transitions. [2022-02-24 01:59:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-02-24 01:59:13,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,185 INFO L225 Difference]: With dead ends: 127 [2022-02-24 01:59:13,185 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 01:59:13,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:13,189 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:13,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 133 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 01:59:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-02-24 01:59:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 82 states have internal predecessors, (149), 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) [2022-02-24 01:59:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2022-02-24 01:59:13,206 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 24 [2022-02-24 01:59:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:13,206 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2022-02-24 01:59:13,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:59:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2022-02-24 01:59:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:59:13,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:13,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:13,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:59:13,208 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1723723460, now seen corresponding path program 1 times [2022-02-24 01:59:13,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:13,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814097390] [2022-02-24 01:59:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:13,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:13,211 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:13,277 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814097390] [2022-02-24 01:59:13,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814097390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,278 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669484475] [2022-02-24 01:59:13,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,279 INFO L87 Difference]: Start difference. First operand 86 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:59:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,398 INFO L93 Difference]: Finished difference Result 238 states and 432 transitions. [2022-02-24 01:59:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-02-24 01:59:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,402 INFO L225 Difference]: With dead ends: 238 [2022-02-24 01:59:13,402 INFO L226 Difference]: Without dead ends: 161 [2022-02-24 01:59:13,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:13,410 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 197 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:13,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 91 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-24 01:59:13,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-02-24 01:59:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8193548387096774) internal successors, (282), 155 states have internal predecessors, (282), 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) [2022-02-24 01:59:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 285 transitions. [2022-02-24 01:59:13,447 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 285 transitions. Word has length 24 [2022-02-24 01:59:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:13,447 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 285 transitions. [2022-02-24 01:59:13,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:59:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 285 transitions. [2022-02-24 01:59:13,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:59:13,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:13,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:13,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:59:13,450 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1291380158, now seen corresponding path program 1 times [2022-02-24 01:59:13,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:13,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932697688] [2022-02-24 01:59:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:13,454 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:13,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932697688] [2022-02-24 01:59:13,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932697688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680979156] [2022-02-24 01:59:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,490 INFO L87 Difference]: Start difference. First operand 159 states and 285 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:59:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,601 INFO L93 Difference]: Finished difference Result 207 states and 371 transitions. [2022-02-24 01:59:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-02-24 01:59:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,604 INFO L225 Difference]: With dead ends: 207 [2022-02-24 01:59:13,604 INFO L226 Difference]: Without dead ends: 205 [2022-02-24 01:59:13,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:13,606 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 128 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:13,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-24 01:59:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2022-02-24 01:59:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8064516129032258) internal successors, (280), 155 states have internal predecessors, (280), 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) [2022-02-24 01:59:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2022-02-24 01:59:13,630 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 24 [2022-02-24 01:59:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:13,633 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2022-02-24 01:59:13,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-24 01:59:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2022-02-24 01:59:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:59:13,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:13,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:13,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:59:13,642 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1896032784, now seen corresponding path program 1 times [2022-02-24 01:59:13,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:13,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464622838] [2022-02-24 01:59:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:13,644 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:13,712 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464622838] [2022-02-24 01:59:13,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [464622838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,712 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123744584] [2022-02-24 01:59:13,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,713 INFO L87 Difference]: Start difference. First operand 159 states and 283 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) [2022-02-24 01:59:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,808 INFO L93 Difference]: Finished difference Result 299 states and 539 transitions. [2022-02-24 01:59:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,809 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 [2022-02-24 01:59:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,811 INFO L225 Difference]: With dead ends: 299 [2022-02-24 01:59:13,811 INFO L226 Difference]: Without dead ends: 297 [2022-02-24 01:59:13,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:13,813 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:13,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-24 01:59:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 215. [2022-02-24 01:59:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.7914691943127963) internal successors, (378), 211 states have internal predecessors, (378), 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) [2022-02-24 01:59:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 381 transitions. [2022-02-24 01:59:13,832 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 381 transitions. Word has length 25 [2022-02-24 01:59:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:13,834 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 381 transitions. [2022-02-24 01:59:13,834 INFO L471 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) [2022-02-24 01:59:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 381 transitions. [2022-02-24 01:59:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:59:13,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:13,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:13,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:59:13,836 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 616169106, now seen corresponding path program 1 times [2022-02-24 01:59:13,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:13,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042871765] [2022-02-24 01:59:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:13,839 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:13,881 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042871765] [2022-02-24 01:59:13,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042871765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533026450] [2022-02-24 01:59:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,883 INFO L87 Difference]: Start difference. First operand 215 states and 381 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) [2022-02-24 01:59:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,983 INFO L93 Difference]: Finished difference Result 511 states and 915 transitions. [2022-02-24 01:59:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,984 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 [2022-02-24 01:59:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,985 INFO L225 Difference]: With dead ends: 511 [2022-02-24 01:59:13,986 INFO L226 Difference]: Without dead ends: 305 [2022-02-24 01:59:13,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:13,987 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:13,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-24 01:59:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 303. [2022-02-24 01:59:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 299 states have (on average 1.7792642140468227) internal successors, (532), 299 states have internal predecessors, (532), 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) [2022-02-24 01:59:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 535 transitions. [2022-02-24 01:59:14,009 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 535 transitions. Word has length 25 [2022-02-24 01:59:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,009 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 535 transitions. [2022-02-24 01:59:14,009 INFO L471 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) [2022-02-24 01:59:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 535 transitions. [2022-02-24 01:59:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:59:14,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:14,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:59:14,010 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1352312423, now seen corresponding path program 1 times [2022-02-24 01:59:14,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906933184] [2022-02-24 01:59:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,012 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:14,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906933184] [2022-02-24 01:59:14,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906933184] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787158490] [2022-02-24 01:59:14,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,041 INFO L87 Difference]: Start difference. First operand 303 states and 535 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) [2022-02-24 01:59:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,138 INFO L93 Difference]: Finished difference Result 457 states and 805 transitions. [2022-02-24 01:59:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,141 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 [2022-02-24 01:59:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,143 INFO L225 Difference]: With dead ends: 457 [2022-02-24 01:59:14,143 INFO L226 Difference]: Without dead ends: 311 [2022-02-24 01:59:14,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:14,145 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 155 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 127 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:14,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-24 01:59:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-02-24 01:59:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.7573770491803278) internal successors, (536), 305 states have internal predecessors, (536), 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) [2022-02-24 01:59:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 539 transitions. [2022-02-24 01:59:14,165 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 539 transitions. Word has length 26 [2022-02-24 01:59:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,165 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 539 transitions. [2022-02-24 01:59:14,166 INFO L471 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) [2022-02-24 01:59:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 539 transitions. [2022-02-24 01:59:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:59:14,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:14,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:59:14,167 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1921586519, now seen corresponding path program 1 times [2022-02-24 01:59:14,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049545463] [2022-02-24 01:59:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,169 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:14,226 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049545463] [2022-02-24 01:59:14,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2049545463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576048357] [2022-02-24 01:59:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,228 INFO L87 Difference]: Start difference. First operand 309 states and 539 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) [2022-02-24 01:59:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,315 INFO L93 Difference]: Finished difference Result 573 states and 1013 transitions. [2022-02-24 01:59:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,315 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 [2022-02-24 01:59:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,318 INFO L225 Difference]: With dead ends: 573 [2022-02-24 01:59:14,318 INFO L226 Difference]: Without dead ends: 571 [2022-02-24 01:59:14,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:14,318 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-24 01:59:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 425. [2022-02-24 01:59:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.7292161520190024) internal successors, (728), 421 states have internal predecessors, (728), 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) [2022-02-24 01:59:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 731 transitions. [2022-02-24 01:59:14,349 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 731 transitions. Word has length 26 [2022-02-24 01:59:14,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,349 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 731 transitions. [2022-02-24 01:59:14,349 INFO L471 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) [2022-02-24 01:59:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 731 transitions. [2022-02-24 01:59:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:59:14,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:14,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:59:14,351 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 641722841, now seen corresponding path program 1 times [2022-02-24 01:59:14,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863331652] [2022-02-24 01:59:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,353 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:14,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863331652] [2022-02-24 01:59:14,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863331652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457619983] [2022-02-24 01:59:14,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,382 INFO L87 Difference]: Start difference. First operand 425 states and 731 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) [2022-02-24 01:59:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,502 INFO L93 Difference]: Finished difference Result 1005 states and 1741 transitions. [2022-02-24 01:59:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,503 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 [2022-02-24 01:59:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,506 INFO L225 Difference]: With dead ends: 1005 [2022-02-24 01:59:14,506 INFO L226 Difference]: Without dead ends: 595 [2022-02-24 01:59:14,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:14,507 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-24 01:59:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-02-24 01:59:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.7181663837011885) internal successors, (1012), 589 states have internal predecessors, (1012), 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) [2022-02-24 01:59:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1015 transitions. [2022-02-24 01:59:14,556 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1015 transitions. Word has length 26 [2022-02-24 01:59:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,556 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1015 transitions. [2022-02-24 01:59:14,556 INFO L471 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) [2022-02-24 01:59:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1015 transitions. [2022-02-24 01:59:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:59:14,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:14,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:59:14,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,558 INFO L85 PathProgramCache]: Analyzing trace with hash -560146297, now seen corresponding path program 1 times [2022-02-24 01:59:14,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508375699] [2022-02-24 01:59:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,560 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:14,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508375699] [2022-02-24 01:59:14,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1508375699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698927554] [2022-02-24 01:59:14,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,589 INFO L87 Difference]: Start difference. First operand 593 states and 1015 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) [2022-02-24 01:59:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,690 INFO L93 Difference]: Finished difference Result 889 states and 1517 transitions. [2022-02-24 01:59:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,690 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 [2022-02-24 01:59:14,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,693 INFO L225 Difference]: With dead ends: 889 [2022-02-24 01:59:14,693 INFO L226 Difference]: Without dead ends: 603 [2022-02-24 01:59:14,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:14,694 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 124 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-24 01:59:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2022-02-24 01:59:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.695142378559464) internal successors, (1012), 597 states have internal predecessors, (1012), 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) [2022-02-24 01:59:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1015 transitions. [2022-02-24 01:59:14,729 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1015 transitions. Word has length 27 [2022-02-24 01:59:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,730 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1015 transitions. [2022-02-24 01:59:14,730 INFO L471 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) [2022-02-24 01:59:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1015 transitions. [2022-02-24 01:59:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:59:14,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:14,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:59:14,731 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1581214651, now seen corresponding path program 1 times [2022-02-24 01:59:14,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197962601] [2022-02-24 01:59:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,734 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:14,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197962601] [2022-02-24 01:59:14,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [197962601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,759 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186244496] [2022-02-24 01:59:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,761 INFO L87 Difference]: Start difference. First operand 601 states and 1015 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) [2022-02-24 01:59:14,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,871 INFO L93 Difference]: Finished difference Result 1101 states and 1889 transitions. [2022-02-24 01:59:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,871 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 [2022-02-24 01:59:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,875 INFO L225 Difference]: With dead ends: 1101 [2022-02-24 01:59:14,875 INFO L226 Difference]: Without dead ends: 1099 [2022-02-24 01:59:14,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:14,876 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-24 01:59:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 841. [2022-02-24 01:59:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.6583034647550776) internal successors, (1388), 837 states have internal predecessors, (1388), 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) [2022-02-24 01:59:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1391 transitions. [2022-02-24 01:59:14,938 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1391 transitions. Word has length 27 [2022-02-24 01:59:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,938 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1391 transitions. [2022-02-24 01:59:14,938 INFO L471 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) [2022-02-24 01:59:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1391 transitions. [2022-02-24 01:59:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:59:14,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:59:14,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1433888967, now seen corresponding path program 1 times [2022-02-24 01:59:14,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932750428] [2022-02-24 01:59:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,941 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:14,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932750428] [2022-02-24 01:59:14,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [932750428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513826549] [2022-02-24 01:59:14,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,961 INFO L87 Difference]: Start difference. First operand 841 states and 1391 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) [2022-02-24 01:59:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:15,103 INFO L93 Difference]: Finished difference Result 1981 states and 3297 transitions. [2022-02-24 01:59:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:15,103 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 [2022-02-24 01:59:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:15,108 INFO L225 Difference]: With dead ends: 1981 [2022-02-24 01:59:15,109 INFO L226 Difference]: Without dead ends: 1163 [2022-02-24 01:59:15,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:15,111 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:15,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-02-24 01:59:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2022-02-24 01:59:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1157 states have (on average 1.6490924805531546) internal successors, (1908), 1157 states have internal predecessors, (1908), 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) [2022-02-24 01:59:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1911 transitions. [2022-02-24 01:59:15,235 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1911 transitions. Word has length 27 [2022-02-24 01:59:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:15,236 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1911 transitions. [2022-02-24 01:59:15,236 INFO L471 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) [2022-02-24 01:59:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1911 transitions. [2022-02-24 01:59:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:59:15,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:15,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:15,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:59:15,238 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:15,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1772799826, now seen corresponding path program 1 times [2022-02-24 01:59:15,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:15,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347728156] [2022-02-24 01:59:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:15,241 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:15,261 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:15,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347728156] [2022-02-24 01:59:15,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347728156] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:15,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:15,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:15,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902710719] [2022-02-24 01:59:15,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:15,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:15,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:15,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:15,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:15,262 INFO L87 Difference]: Start difference. First operand 1161 states and 1911 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) [2022-02-24 01:59:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:15,422 INFO L93 Difference]: Finished difference Result 1741 states and 2857 transitions. [2022-02-24 01:59:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:15,422 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 [2022-02-24 01:59:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:15,426 INFO L225 Difference]: With dead ends: 1741 [2022-02-24 01:59:15,426 INFO L226 Difference]: Without dead ends: 1179 [2022-02-24 01:59:15,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:15,428 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:15,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-02-24 01:59:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-02-24 01:59:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1173 states have (on average 1.6265984654731458) internal successors, (1908), 1173 states have internal predecessors, (1908), 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) [2022-02-24 01:59:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1911 transitions. [2022-02-24 01:59:15,518 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1911 transitions. Word has length 28 [2022-02-24 01:59:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:15,518 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1911 transitions. [2022-02-24 01:59:15,518 INFO L471 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) [2022-02-24 01:59:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1911 transitions. [2022-02-24 01:59:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:59:15,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:15,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:15,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:59:15,520 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1501099116, now seen corresponding path program 1 times [2022-02-24 01:59:15,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:15,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237117846] [2022-02-24 01:59:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:15,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:15,522 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:15,545 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:15,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237117846] [2022-02-24 01:59:15,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [237117846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:15,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:15,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:15,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222315785] [2022-02-24 01:59:15,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:15,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:15,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:15,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:15,546 INFO L87 Difference]: Start difference. First operand 1177 states and 1911 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) [2022-02-24 01:59:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:15,798 INFO L93 Difference]: Finished difference Result 2125 states and 3513 transitions. [2022-02-24 01:59:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:15,799 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 [2022-02-24 01:59:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:15,807 INFO L225 Difference]: With dead ends: 2125 [2022-02-24 01:59:15,807 INFO L226 Difference]: Without dead ends: 2123 [2022-02-24 01:59:15,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:15,809 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:15,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-02-24 01:59:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1673. [2022-02-24 01:59:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1669 states have (on average 1.5841821449970042) internal successors, (2644), 1669 states have internal predecessors, (2644), 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) [2022-02-24 01:59:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2647 transitions. [2022-02-24 01:59:16,004 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2647 transitions. Word has length 28 [2022-02-24 01:59:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:16,004 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2647 transitions. [2022-02-24 01:59:16,004 INFO L471 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) [2022-02-24 01:59:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2647 transitions. [2022-02-24 01:59:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:59:16,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:16,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:16,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:59:16,023 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash 221235438, now seen corresponding path program 1 times [2022-02-24 01:59:16,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:16,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122860041] [2022-02-24 01:59:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:16,027 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:16,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:16,081 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:16,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122860041] [2022-02-24 01:59:16,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1122860041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:16,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:16,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:16,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330294243] [2022-02-24 01:59:16,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:16,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:16,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:16,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:16,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:16,082 INFO L87 Difference]: Start difference. First operand 1673 states and 2647 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) [2022-02-24 01:59:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:16,388 INFO L93 Difference]: Finished difference Result 3917 states and 6233 transitions. [2022-02-24 01:59:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:16,388 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 [2022-02-24 01:59:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:16,397 INFO L225 Difference]: With dead ends: 3917 [2022-02-24 01:59:16,397 INFO L226 Difference]: Without dead ends: 2283 [2022-02-24 01:59:16,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:16,403 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:16,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 121 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-02-24 01:59:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2281. [2022-02-24 01:59:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5757575757575757) internal successors, (3588), 2277 states have internal predecessors, (3588), 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) [2022-02-24 01:59:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3591 transitions. [2022-02-24 01:59:16,653 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3591 transitions. Word has length 28 [2022-02-24 01:59:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:16,654 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3591 transitions. [2022-02-24 01:59:16,654 INFO L471 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) [2022-02-24 01:59:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3591 transitions. [2022-02-24 01:59:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:59:16,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:16,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:16,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:59:16,657 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash -710353220, now seen corresponding path program 1 times [2022-02-24 01:59:16,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:16,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562836083] [2022-02-24 01:59:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:16,660 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:16,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:16,687 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:16,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562836083] [2022-02-24 01:59:16,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [562836083] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:16,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:16,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:16,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744536019] [2022-02-24 01:59:16,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:16,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:16,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:16,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:16,689 INFO L87 Difference]: Start difference. First operand 2281 states and 3591 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) [2022-02-24 01:59:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:17,052 INFO L93 Difference]: Finished difference Result 3421 states and 5369 transitions. [2022-02-24 01:59:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:17,053 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 [2022-02-24 01:59:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:17,060 INFO L225 Difference]: With dead ends: 3421 [2022-02-24 01:59:17,060 INFO L226 Difference]: Without dead ends: 2315 [2022-02-24 01:59:17,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:17,063 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:17,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-24 01:59:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-02-24 01:59:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2309 states have (on average 1.5539194456474665) internal successors, (3588), 2309 states have internal predecessors, (3588), 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) [2022-02-24 01:59:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3591 transitions. [2022-02-24 01:59:17,275 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3591 transitions. Word has length 29 [2022-02-24 01:59:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:17,275 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3591 transitions. [2022-02-24 01:59:17,276 INFO L471 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) [2022-02-24 01:59:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3591 transitions. [2022-02-24 01:59:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:59:17,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:17,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:17,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:59:17,279 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1731421574, now seen corresponding path program 1 times [2022-02-24 01:59:17,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:17,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741381270] [2022-02-24 01:59:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:17,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:17,280 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:17,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:17,345 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:17,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741381270] [2022-02-24 01:59:17,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [741381270] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:17,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:17,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:17,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454702330] [2022-02-24 01:59:17,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:17,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:17,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:17,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:17,346 INFO L87 Difference]: Start difference. First operand 2313 states and 3591 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) [2022-02-24 01:59:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:17,800 INFO L93 Difference]: Finished difference Result 4109 states and 6505 transitions. [2022-02-24 01:59:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:17,801 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 [2022-02-24 01:59:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:17,814 INFO L225 Difference]: With dead ends: 4109 [2022-02-24 01:59:17,814 INFO L226 Difference]: Without dead ends: 4107 [2022-02-24 01:59:17,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:17,816 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:17,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-02-24 01:59:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3337. [2022-02-24 01:59:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.5085508550855085) internal successors, (5028), 3333 states have internal predecessors, (5028), 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) [2022-02-24 01:59:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 5031 transitions. [2022-02-24 01:59:18,126 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 5031 transitions. Word has length 29 [2022-02-24 01:59:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:18,126 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 5031 transitions. [2022-02-24 01:59:18,126 INFO L471 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) [2022-02-24 01:59:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 5031 transitions. [2022-02-24 01:59:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:59:18,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:18,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:18,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:59:18,132 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1283682044, now seen corresponding path program 1 times [2022-02-24 01:59:18,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:18,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788658904] [2022-02-24 01:59:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:18,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:18,134 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:18,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:18,156 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:18,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788658904] [2022-02-24 01:59:18,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788658904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:18,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:18,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:18,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605286123] [2022-02-24 01:59:18,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:18,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:18,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:18,157 INFO L87 Difference]: Start difference. First operand 3337 states and 5031 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) [2022-02-24 01:59:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:18,651 INFO L93 Difference]: Finished difference Result 7757 states and 11753 transitions. [2022-02-24 01:59:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:18,651 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 [2022-02-24 01:59:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:18,664 INFO L225 Difference]: With dead ends: 7757 [2022-02-24 01:59:18,665 INFO L226 Difference]: Without dead ends: 4491 [2022-02-24 01:59:18,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:18,673 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:18,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 123 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-02-24 01:59:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4489. [2022-02-24 01:59:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4485 states have (on average 1.4992196209587514) internal successors, (6724), 4485 states have internal predecessors, (6724), 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) [2022-02-24 01:59:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6727 transitions. [2022-02-24 01:59:19,041 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6727 transitions. Word has length 29 [2022-02-24 01:59:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:19,041 INFO L470 AbstractCegarLoop]: Abstraction has 4489 states and 6727 transitions. [2022-02-24 01:59:19,041 INFO L471 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) [2022-02-24 01:59:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6727 transitions. [2022-02-24 01:59:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:59:19,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:19,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:19,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:59:19,045 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2134246461, now seen corresponding path program 1 times [2022-02-24 01:59:19,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:19,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85862048] [2022-02-24 01:59:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:19,047 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:19,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:19,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:19,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85862048] [2022-02-24 01:59:19,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [85862048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:19,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:19,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:19,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340749060] [2022-02-24 01:59:19,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:19,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:19,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:19,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:19,072 INFO L87 Difference]: Start difference. First operand 4489 states and 6727 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) [2022-02-24 01:59:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:19,451 INFO L93 Difference]: Finished difference Result 6733 states and 10057 transitions. [2022-02-24 01:59:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:19,452 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 [2022-02-24 01:59:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:19,463 INFO L225 Difference]: With dead ends: 6733 [2022-02-24 01:59:19,464 INFO L226 Difference]: Without dead ends: 4555 [2022-02-24 01:59:19,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:19,471 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:19,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:19,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2022-02-24 01:59:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4553. [2022-02-24 01:59:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.478127060892504) internal successors, (6724), 4549 states have internal predecessors, (6724), 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) [2022-02-24 01:59:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6727 transitions. [2022-02-24 01:59:19,896 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6727 transitions. Word has length 30 [2022-02-24 01:59:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:19,896 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6727 transitions. [2022-02-24 01:59:19,896 INFO L471 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) [2022-02-24 01:59:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6727 transitions. [2022-02-24 01:59:19,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:59:19,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:19,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:19,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:59:19,900 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1139652481, now seen corresponding path program 1 times [2022-02-24 01:59:19,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:19,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277189582] [2022-02-24 01:59:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:19,902 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:19,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:19,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:19,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277189582] [2022-02-24 01:59:19,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [277189582] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:19,920 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:19,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:19,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913294013] [2022-02-24 01:59:19,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:19,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:19,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:19,920 INFO L87 Difference]: Start difference. First operand 4553 states and 6727 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) [2022-02-24 01:59:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:20,764 INFO L93 Difference]: Finished difference Result 7949 states and 11977 transitions. [2022-02-24 01:59:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:20,765 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 [2022-02-24 01:59:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:20,778 INFO L225 Difference]: With dead ends: 7949 [2022-02-24 01:59:20,779 INFO L226 Difference]: Without dead ends: 7947 [2022-02-24 01:59:20,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:20,781 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:20,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-02-24 01:59:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6665. [2022-02-24 01:59:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.4322173847770605) internal successors, (9540), 6661 states have internal predecessors, (9540), 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) [2022-02-24 01:59:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 9543 transitions. [2022-02-24 01:59:21,407 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 9543 transitions. Word has length 30 [2022-02-24 01:59:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:21,407 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 9543 transitions. [2022-02-24 01:59:21,408 INFO L471 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) [2022-02-24 01:59:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 9543 transitions. [2022-02-24 01:59:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:59:21,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:21,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:21,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:59:21,417 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -140211197, now seen corresponding path program 1 times [2022-02-24 01:59:21,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:21,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985175504] [2022-02-24 01:59:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:21,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:21,420 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:21,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:21,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:21,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985175504] [2022-02-24 01:59:21,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [985175504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:21,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:21,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:21,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919629755] [2022-02-24 01:59:21,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:21,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:21,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:21,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:21,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:21,443 INFO L87 Difference]: Start difference. First operand 6665 states and 9543 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) [2022-02-24 01:59:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:22,208 INFO L93 Difference]: Finished difference Result 15373 states and 22089 transitions. [2022-02-24 01:59:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:22,208 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 [2022-02-24 01:59:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:22,227 INFO L225 Difference]: With dead ends: 15373 [2022-02-24 01:59:22,227 INFO L226 Difference]: Without dead ends: 8843 [2022-02-24 01:59:22,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:22,241 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:22,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2022-02-24 01:59:22,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8841. [2022-02-24 01:59:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8837 states have (on average 1.419938893289578) internal successors, (12548), 8837 states have internal predecessors, (12548), 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) [2022-02-24 01:59:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12551 transitions. [2022-02-24 01:59:22,952 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12551 transitions. Word has length 30 [2022-02-24 01:59:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:22,952 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 12551 transitions. [2022-02-24 01:59:22,952 INFO L471 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) [2022-02-24 01:59:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12551 transitions. [2022-02-24 01:59:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:59:22,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:22,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:22,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:59:22,960 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash 969703665, now seen corresponding path program 1 times [2022-02-24 01:59:22,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:22,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086360246] [2022-02-24 01:59:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:22,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:22,962 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:22,985 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:22,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086360246] [2022-02-24 01:59:22,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086360246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:22,986 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:22,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:22,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326926709] [2022-02-24 01:59:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:22,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:22,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:22,987 INFO L87 Difference]: Start difference. First operand 8841 states and 12551 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) [2022-02-24 01:59:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:23,743 INFO L93 Difference]: Finished difference Result 13261 states and 18761 transitions. [2022-02-24 01:59:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:23,744 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 [2022-02-24 01:59:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:23,793 INFO L225 Difference]: With dead ends: 13261 [2022-02-24 01:59:23,793 INFO L226 Difference]: Without dead ends: 8971 [2022-02-24 01:59:23,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:23,805 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:23,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 112 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-02-24 01:59:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2022-02-24 01:59:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8965 states have (on average 1.399665365309537) internal successors, (12548), 8965 states have internal predecessors, (12548), 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) [2022-02-24 01:59:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12551 transitions. [2022-02-24 01:59:24,756 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12551 transitions. Word has length 31 [2022-02-24 01:59:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:24,756 INFO L470 AbstractCegarLoop]: Abstraction has 8969 states and 12551 transitions. [2022-02-24 01:59:24,757 INFO L471 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) [2022-02-24 01:59:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12551 transitions. [2022-02-24 01:59:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:59:24,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:24,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:24,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:59:24,764 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash -51364689, now seen corresponding path program 1 times [2022-02-24 01:59:24,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:24,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044831956] [2022-02-24 01:59:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:24,766 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:24,788 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:24,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044831956] [2022-02-24 01:59:24,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044831956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:24,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:24,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:24,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602211182] [2022-02-24 01:59:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:24,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:24,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:24,791 INFO L87 Difference]: Start difference. First operand 8969 states and 12551 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) [2022-02-24 01:59:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:26,156 INFO L93 Difference]: Finished difference Result 15373 states and 21897 transitions. [2022-02-24 01:59:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:26,157 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 [2022-02-24 01:59:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:26,187 INFO L225 Difference]: With dead ends: 15373 [2022-02-24 01:59:26,187 INFO L226 Difference]: Without dead ends: 15371 [2022-02-24 01:59:26,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:26,195 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:26,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2022-02-24 01:59:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13321. [2022-02-24 01:59:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13321 states, 13317 states have (on average 1.355560561688068) internal successors, (18052), 13317 states have internal predecessors, (18052), 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) [2022-02-24 01:59:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13321 states to 13321 states and 18055 transitions. [2022-02-24 01:59:27,352 INFO L78 Accepts]: Start accepts. Automaton has 13321 states and 18055 transitions. Word has length 31 [2022-02-24 01:59:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:27,353 INFO L470 AbstractCegarLoop]: Abstraction has 13321 states and 18055 transitions. [2022-02-24 01:59:27,353 INFO L471 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) [2022-02-24 01:59:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13321 states and 18055 transitions. [2022-02-24 01:59:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:59:27,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:27,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:27,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:59:27,368 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1331228367, now seen corresponding path program 1 times [2022-02-24 01:59:27,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:27,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914352167] [2022-02-24 01:59:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:27,374 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:27,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:27,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:27,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:27,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914352167] [2022-02-24 01:59:27,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1914352167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:27,396 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:27,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:27,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871347060] [2022-02-24 01:59:27,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:27,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:27,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:27,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:27,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:27,397 INFO L87 Difference]: Start difference. First operand 13321 states and 18055 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) [2022-02-24 01:59:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:28,984 INFO L93 Difference]: Finished difference Result 30477 states and 41353 transitions. [2022-02-24 01:59:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:28,984 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 [2022-02-24 01:59:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:29,014 INFO L225 Difference]: With dead ends: 30477 [2022-02-24 01:59:29,014 INFO L226 Difference]: Without dead ends: 17419 [2022-02-24 01:59:29,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:29,040 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:29,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2022-02-24 01:59:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17417. [2022-02-24 01:59:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17417 states, 17413 states have (on average 1.3380807442715212) internal successors, (23300), 17413 states have internal predecessors, (23300), 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) [2022-02-24 01:59:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17417 states to 17417 states and 23303 transitions. [2022-02-24 01:59:31,254 INFO L78 Accepts]: Start accepts. Automaton has 17417 states and 23303 transitions. Word has length 31 [2022-02-24 01:59:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:31,254 INFO L470 AbstractCegarLoop]: Abstraction has 17417 states and 23303 transitions. [2022-02-24 01:59:31,255 INFO L471 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) [2022-02-24 01:59:31,255 INFO L276 IsEmpty]: Start isEmpty. Operand 17417 states and 23303 transitions. [2022-02-24 01:59:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:59:31,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:31,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:31,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:59:31,271 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1592089896, now seen corresponding path program 1 times [2022-02-24 01:59:31,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:31,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012298342] [2022-02-24 01:59:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:31,277 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:31,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:31,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012298342] [2022-02-24 01:59:31,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012298342] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:31,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:31,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:31,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190088091] [2022-02-24 01:59:31,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:31,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:31,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:31,304 INFO L87 Difference]: Start difference. First operand 17417 states and 23303 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) [2022-02-24 01:59:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:33,259 INFO L93 Difference]: Finished difference Result 26125 states and 34825 transitions. [2022-02-24 01:59:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:33,261 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 [2022-02-24 01:59:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:33,296 INFO L225 Difference]: With dead ends: 26125 [2022-02-24 01:59:33,296 INFO L226 Difference]: Without dead ends: 17675 [2022-02-24 01:59:33,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:33,319 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:33,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2022-02-24 01:59:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17673. [2022-02-24 01:59:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17673 states, 17669 states have (on average 1.3186937574282642) internal successors, (23300), 17669 states have internal predecessors, (23300), 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) [2022-02-24 01:59:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17673 states to 17673 states and 23303 transitions. [2022-02-24 01:59:34,942 INFO L78 Accepts]: Start accepts. Automaton has 17673 states and 23303 transitions. Word has length 32 [2022-02-24 01:59:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:34,942 INFO L470 AbstractCegarLoop]: Abstraction has 17673 states and 23303 transitions. [2022-02-24 01:59:34,942 INFO L471 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) [2022-02-24 01:59:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 17673 states and 23303 transitions. [2022-02-24 01:59:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:59:34,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:34,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:34,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:59:34,956 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1681809046, now seen corresponding path program 1 times [2022-02-24 01:59:34,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:34,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207082418] [2022-02-24 01:59:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:34,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:34,958 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:35,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:35,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:35,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207082418] [2022-02-24 01:59:35,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207082418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:35,008 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:35,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:35,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878268071] [2022-02-24 01:59:35,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:35,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:35,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:35,009 INFO L87 Difference]: Start difference. First operand 17673 states and 23303 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) [2022-02-24 01:59:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:39,153 INFO L93 Difference]: Finished difference Result 51469 states and 66825 transitions. [2022-02-24 01:59:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:39,153 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 [2022-02-24 01:59:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:39,239 INFO L225 Difference]: With dead ends: 51469 [2022-02-24 01:59:39,239 INFO L226 Difference]: Without dead ends: 34315 [2022-02-24 01:59:39,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:39,440 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:39,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 99 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2022-02-24 01:59:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34313. [2022-02-24 01:59:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2685884170334314) internal successors, (43524), 34309 states have internal predecessors, (43524), 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) [2022-02-24 01:59:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 43527 transitions. [2022-02-24 01:59:42,689 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 43527 transitions. Word has length 32 [2022-02-24 01:59:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:42,689 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 43527 transitions. [2022-02-24 01:59:42,690 INFO L471 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) [2022-02-24 01:59:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 43527 transitions. [2022-02-24 01:59:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:59:42,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:42,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:42,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:59:42,713 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1333294572, now seen corresponding path program 1 times [2022-02-24 01:59:42,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:42,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851060141] [2022-02-24 01:59:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:42,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:42,715 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:42,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:42,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:42,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851060141] [2022-02-24 01:59:42,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851060141] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:42,743 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:42,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:42,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138383875] [2022-02-24 01:59:42,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:42,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:42,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:42,744 INFO L87 Difference]: Start difference. First operand 34313 states and 43527 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) [2022-02-24 01:59:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:46,650 INFO L93 Difference]: Finished difference Result 37389 states and 48649 transitions. [2022-02-24 01:59:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:46,650 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 [2022-02-24 01:59:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:46,711 INFO L225 Difference]: With dead ends: 37389 [2022-02-24 01:59:46,711 INFO L226 Difference]: Without dead ends: 37387 [2022-02-24 01:59:46,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:46,789 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 96 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:46,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 120 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:59:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-02-24 01:59:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 34313. [2022-02-24 01:59:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2536652190387363) internal successors, (43012), 34309 states have internal predecessors, (43012), 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) [2022-02-24 01:59:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 43015 transitions. [2022-02-24 01:59:50,426 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 43015 transitions. Word has length 32 [2022-02-24 01:59:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:50,426 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 43015 transitions. [2022-02-24 01:59:50,426 INFO L471 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) [2022-02-24 01:59:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 43015 transitions. [2022-02-24 01:59:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:59:50,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:50,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:59:50,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:59:50,458 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash 596688678, now seen corresponding path program 1 times [2022-02-24 01:59:50,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:50,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975426848] [2022-02-24 01:59:50,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:50,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:50,464 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:59:50,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:50,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975426848] [2022-02-24 01:59:50,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [975426848] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:50,494 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:50,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:50,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102398961] [2022-02-24 01:59:50,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:50,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:50,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:50,495 INFO L87 Difference]: Start difference. First operand 34313 states and 43015 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) [2022-02-24 01:59:57,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:57,180 INFO L93 Difference]: Finished difference Result 56845 states and 71689 transitions. [2022-02-24 01:59:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:57,181 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 [2022-02-24 01:59:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:57,293 INFO L225 Difference]: With dead ends: 56845 [2022-02-24 01:59:57,293 INFO L226 Difference]: Without dead ends: 56843 [2022-02-24 01:59:57,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:59:57,314 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:57,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56843 states. [2022-02-24 02:00:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56843 to 52745. [2022-02-24 02:00:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52745 states, 52741 states have (on average 1.2232608407121595) internal successors, (64516), 52741 states have internal predecessors, (64516), 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) [2022-02-24 02:00:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52745 states to 52745 states and 64519 transitions. [2022-02-24 02:00:02,730 INFO L78 Accepts]: Start accepts. Automaton has 52745 states and 64519 transitions. Word has length 33 [2022-02-24 02:00:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:00:02,730 INFO L470 AbstractCegarLoop]: Abstraction has 52745 states and 64519 transitions. [2022-02-24 02:00:02,730 INFO L471 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) [2022-02-24 02:00:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 52745 states and 64519 transitions. [2022-02-24 02:00:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 02:00:02,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:00:02,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:00:02,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 02:00:02,775 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:00:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:00:02,775 INFO L85 PathProgramCache]: Analyzing trace with hash -683175000, now seen corresponding path program 1 times [2022-02-24 02:00:02,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:00:02,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909675068] [2022-02-24 02:00:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:00:02,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:00:02,776 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:00:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:00:02,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:00:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:00:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:00:02,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:00:02,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909675068] [2022-02-24 02:00:02,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [909675068] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:00:02,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:00:02,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 02:00:02,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969001724] [2022-02-24 02:00:02,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:00:02,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 02:00:02,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:00:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 02:00:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 02:00:02,793 INFO L87 Difference]: Start difference. First operand 52745 states and 64519 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) [2022-02-24 02:00:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:00:09,767 INFO L93 Difference]: Finished difference Result 119309 states and 145417 transitions. [2022-02-24 02:00:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 02:00:09,768 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 [2022-02-24 02:00:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:00:09,929 INFO L225 Difference]: With dead ends: 119309 [2022-02-24 02:00:09,930 INFO L226 Difference]: Without dead ends: 67083 [2022-02-24 02:00:10,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:00:10,267 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:00:10,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:00:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67083 states. [2022-02-24 02:00:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67083 to 67081. [2022-02-24 02:00:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67081 states, 67077 states have (on average 1.1908105609970632) internal successors, (79876), 67077 states have internal predecessors, (79876), 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) [2022-02-24 02:00:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67081 states to 67081 states and 79879 transitions. [2022-02-24 02:00:18,178 INFO L78 Accepts]: Start accepts. Automaton has 67081 states and 79879 transitions. Word has length 33 [2022-02-24 02:00:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:00:18,179 INFO L470 AbstractCegarLoop]: Abstraction has 67081 states and 79879 transitions. [2022-02-24 02:00:18,179 INFO L471 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) [2022-02-24 02:00:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 67081 states and 79879 transitions. [2022-02-24 02:00:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 02:00:18,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:00:18,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:00:18,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 02:00:18,241 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:00:18,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:00:18,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1317695979, now seen corresponding path program 1 times [2022-02-24 02:00:18,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:00:18,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43923758] [2022-02-24 02:00:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:00:18,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:00:18,245 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:00:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:00:18,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:00:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:00:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:00:18,265 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:00:18,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43923758] [2022-02-24 02:00:18,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [43923758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:00:18,265 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:00:18,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 02:00:18,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923972874] [2022-02-24 02:00:18,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:00:18,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 02:00:18,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:00:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 02:00:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 02:00:18,266 INFO L87 Difference]: Start difference. First operand 67081 states and 79879 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) [2022-02-24 02:00:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:00:26,423 INFO L93 Difference]: Finished difference Result 101389 states and 120841 transitions. [2022-02-24 02:00:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 02:00:26,424 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 [2022-02-24 02:00:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:00:26,604 INFO L225 Difference]: With dead ends: 101389 [2022-02-24 02:00:26,604 INFO L226 Difference]: Without dead ends: 68619 [2022-02-24 02:00:26,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:00:26,843 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:00:26,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:00:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2022-02-24 02:00:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68617. [2022-02-24 02:00:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68617 states, 68613 states have (on average 1.1790768513255505) internal successors, (80900), 68613 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) [2022-02-24 02:00:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68617 states to 68617 states and 80903 transitions. [2022-02-24 02:00:34,986 INFO L78 Accepts]: Start accepts. Automaton has 68617 states and 80903 transitions. Word has length 34 [2022-02-24 02:00:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:00:34,986 INFO L470 AbstractCegarLoop]: Abstraction has 68617 states and 80903 transitions. [2022-02-24 02:00:34,986 INFO L471 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) [2022-02-24 02:00:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 68617 states and 80903 transitions. [2022-02-24 02:00:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 02:00:35,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:00:35,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:00:35,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 02:00:35,056 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:00:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:00:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 296627625, now seen corresponding path program 1 times [2022-02-24 02:00:35,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:00:35,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433406191] [2022-02-24 02:00:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:00:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:00:35,058 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:00:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:00:35,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:00:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:00:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:00:35,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:00:35,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433406191] [2022-02-24 02:00:35,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433406191] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:00:35,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:00:35,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 02:00:35,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805080714] [2022-02-24 02:00:35,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:00:35,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 02:00:35,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:00:35,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 02:00:35,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 02:00:35,104 INFO L87 Difference]: Start difference. First operand 68617 states and 80903 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) [2022-02-24 02:00:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:00:47,952 INFO L93 Difference]: Finished difference Result 110603 states and 129032 transitions. [2022-02-24 02:00:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 02:00:47,952 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 [2022-02-24 02:00:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:00:48,445 INFO L225 Difference]: With dead ends: 110603 [2022-02-24 02:00:48,445 INFO L226 Difference]: Without dead ends: 110601 [2022-02-24 02:00:48,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:00:48,500 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:00:48,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:00:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2022-02-24 02:01:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 106505. [2022-02-24 02:01:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106505 states, 106501 states have (on average 1.1538295415066526) internal successors, (122884), 106501 states have internal predecessors, (122884), 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) [2022-02-24 02:01:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106505 states to 106505 states and 122887 transitions. [2022-02-24 02:01:02,217 INFO L78 Accepts]: Start accepts. Automaton has 106505 states and 122887 transitions. Word has length 34 [2022-02-24 02:01:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:01:02,218 INFO L470 AbstractCegarLoop]: Abstraction has 106505 states and 122887 transitions. [2022-02-24 02:01:02,218 INFO L471 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) [2022-02-24 02:01:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 106505 states and 122887 transitions. [2022-02-24 02:01:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 02:01:02,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:01:02,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:01:02,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 02:01:02,353 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:01:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:01:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash -983236053, now seen corresponding path program 1 times [2022-02-24 02:01:02,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:01:02,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612847079] [2022-02-24 02:01:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:01:02,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:01:02,356 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:01:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:01:02,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:01:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:01:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:01:02,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:01:02,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612847079] [2022-02-24 02:01:02,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [612847079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:01:02,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:01:02,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 02:01:02,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818386389] [2022-02-24 02:01:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:01:02,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 02:01:02,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:01:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 02:01:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 02:01:02,407 INFO L87 Difference]: Start difference. First operand 106505 states and 122887 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) [2022-02-24 02:01:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:01:18,708 INFO L93 Difference]: Finished difference Result 237577 states and 270343 transitions. [2022-02-24 02:01:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 02:01:18,708 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 [2022-02-24 02:01:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:01:18,709 INFO L225 Difference]: With dead ends: 237577 [2022-02-24 02:01:18,709 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 02:01:18,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 02:01:18,995 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:01:18,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:01:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 02:01:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 02:01:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-24 02:01:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 02:01:18,996 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-02-24 02:01:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:01:18,996 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 02:01:18,996 INFO L471 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) [2022-02-24 02:01:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 02:01:18,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 02:01:18,999 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 02:01:19,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 02:01:19,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.