/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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:59:08,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:59:08,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:59:09,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:59:09,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:59:09,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:59:09,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:59:09,049 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 01:59:09,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:59:09,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:59:09,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:59:09,057 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:59:09,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:59:09,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:59:09,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:59:09,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:59:09,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:59:09,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:59:09,058 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:59:09,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:59:09,058 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:59:09,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:59:09,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:59:09,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:59:09,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:59:09,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:59:09,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:59:09,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:59:09,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:59:09,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:59:09,059 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:59:09,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:59:09,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:59:09,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:59:09,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:59:09,282 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:59:09,282 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:59:09,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2022-02-24 01:59:09,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b823b657/d137bbde37e944e7b2fa24f1fd301c12/FLAG4b4767445 [2022-02-24 01:59:09,694 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:59:09,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2022-02-24 01:59:09,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b823b657/d137bbde37e944e7b2fa24f1fd301c12/FLAG4b4767445 [2022-02-24 01:59:10,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b823b657/d137bbde37e944e7b2fa24f1fd301c12 [2022-02-24 01:59:10,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:59:10,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:59:10,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:59:10,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:59:10,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:59:10,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49de3743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10, skipping insertion in model container [2022-02-24 01:59:10,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:59:10,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:59:10,281 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_11.c[4246,4259] [2022-02-24 01:59:10,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:59:10,288 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:59:10,320 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_11.c[4246,4259] [2022-02-24 01:59:10,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:59:10,333 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:59:10,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10 WrapperNode [2022-02-24 01:59:10,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:59:10,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:59:10,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:59:10,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:59:10,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:59:10,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:59:10,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:59:10,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:59:10,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (1/1) ... [2022-02-24 01:59:10,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:59:10,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:59:10,412 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 01:59:10,415 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 01:59:10,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:59:10,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:59:10,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:59:10,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:59:10,440 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:59:10,440 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:59:10,440 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:59:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:59:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:59:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:59:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:59:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:59:10,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:59:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:59:10,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:59:10,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:59:10,491 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:59:10,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:59:10,626 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:59:10,630 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:59:10,631 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:59:10,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:59:10 BoogieIcfgContainer [2022-02-24 01:59:10,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:59:10,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:59:10,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:59:10,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:59:10,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:59:10" (1/3) ... [2022-02-24 01:59:10,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316ff3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:59:10, skipping insertion in model container [2022-02-24 01:59:10,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:59:10" (2/3) ... [2022-02-24 01:59:10,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316ff3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:59:10, skipping insertion in model container [2022-02-24 01:59:10,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:59:10" (3/3) ... [2022-02-24 01:59:10,650 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2022-02-24 01:59:10,653 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:59:10,653 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:59:10,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:59:10,709 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 01:59:10,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:59:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 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 01:59:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:59:10,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:10,735 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] [2022-02-24 01:59:10,747 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:10,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:10,751 INFO L85 PathProgramCache]: Analyzing trace with hash 284629267, now seen corresponding path program 1 times [2022-02-24 01:59:10,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:10,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715582807] [2022-02-24 01:59:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:10,795 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:10,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:10,917 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 01:59:10,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:10,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715582807] [2022-02-24 01:59:10,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [715582807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:10,920 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:10,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:10,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223438679] [2022-02-24 01:59:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:10,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:10,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:10,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:10,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:10,953 INFO L87 Difference]: Start difference. First operand has 48 states, 42 states have (on average 1.880952380952381) internal successors, (79), 43 states have internal predecessors, (79), 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 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 01:59:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:11,125 INFO L93 Difference]: Finished difference Result 94 states and 163 transitions. [2022-02-24 01:59:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:11,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 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 22 [2022-02-24 01:59:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:11,132 INFO L225 Difference]: With dead ends: 94 [2022-02-24 01:59:11,133 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 01:59:11,134 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 01:59:11,137 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 191 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:11,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 95 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 01:59:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2022-02-24 01:59:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 states have internal predecessors, (95), 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 01:59:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 98 transitions. [2022-02-24 01:59:11,168 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 98 transitions. Word has length 22 [2022-02-24 01:59:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:11,168 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 98 transitions. [2022-02-24 01:59:11,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 01:59:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 98 transitions. [2022-02-24 01:59:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:59:11,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:11,169 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] [2022-02-24 01:59:11,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:59:11,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:11,170 INFO L85 PathProgramCache]: Analyzing trace with hash -726487983, now seen corresponding path program 1 times [2022-02-24 01:59:11,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:11,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816235979] [2022-02-24 01:59:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:11,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:11,173 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,240 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 01:59:11,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:11,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816235979] [2022-02-24 01:59:11,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [816235979] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:11,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:11,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:11,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816543118] [2022-02-24 01:59:11,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:11,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:11,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:11,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:11,242 INFO L87 Difference]: Start difference. First operand 55 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 01:59:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:11,345 INFO L93 Difference]: Finished difference Result 128 states and 233 transitions. [2022-02-24 01:59:11,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:11,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 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 22 [2022-02-24 01:59:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:11,346 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:59:11,347 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 01:59:11,347 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 01:59:11,349 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 103 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 01:59:11,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 103 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 01:59:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-02-24 01:59:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 73 states have internal predecessors, (135), 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 01:59:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 138 transitions. [2022-02-24 01:59:11,364 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 138 transitions. Word has length 22 [2022-02-24 01:59:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:11,365 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 138 transitions. [2022-02-24 01:59:11,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 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 01:59:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 138 transitions. [2022-02-24 01:59:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:59:11,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:11,366 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 01:59:11,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:59:11,366 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 233785744, now seen corresponding path program 1 times [2022-02-24 01:59:11,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:11,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822743726] [2022-02-24 01:59:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:11,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:11,369 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,419 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 01:59:11,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:11,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822743726] [2022-02-24 01:59:11,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822743726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:11,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:11,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:11,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304798728] [2022-02-24 01:59:11,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:11,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:11,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:11,422 INFO L87 Difference]: Start difference. First operand 77 states and 138 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 01:59:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:11,517 INFO L93 Difference]: Finished difference Result 118 states and 208 transitions. [2022-02-24 01:59:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:11,517 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 01:59:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:11,518 INFO L225 Difference]: With dead ends: 118 [2022-02-24 01:59:11,519 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 01:59:11,519 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 01:59:11,520 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 123 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 01:59:11,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 01:59:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-02-24 01:59:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 76 states have internal predecessors, (137), 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 01:59:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 140 transitions. [2022-02-24 01:59:11,532 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 140 transitions. Word has length 23 [2022-02-24 01:59:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:11,532 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 140 transitions. [2022-02-24 01:59:11,532 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 01:59:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 140 transitions. [2022-02-24 01:59:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:59:11,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:11,533 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 01:59:11,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:59:11,533 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:11,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:11,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1046077934, now seen corresponding path program 1 times [2022-02-24 01:59:11,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:11,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762770141] [2022-02-24 01:59:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:11,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:11,536 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,574 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 01:59:11,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:11,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762770141] [2022-02-24 01:59:11,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762770141] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:11,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:11,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:11,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588942027] [2022-02-24 01:59:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:11,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:11,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:11,576 INFO L87 Difference]: Start difference. First operand 80 states and 140 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 01:59:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:11,648 INFO L93 Difference]: Finished difference Result 220 states and 396 transitions. [2022-02-24 01:59:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:11,648 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 01:59:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:11,649 INFO L225 Difference]: With dead ends: 220 [2022-02-24 01:59:11,649 INFO L226 Difference]: Without dead ends: 149 [2022-02-24 01:59:11,650 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 01:59:11,651 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 85 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 01:59:11,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 85 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-24 01:59:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-02-24 01:59:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.8041958041958042) internal successors, (258), 143 states have internal predecessors, (258), 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 01:59:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 261 transitions. [2022-02-24 01:59:11,678 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 261 transitions. Word has length 23 [2022-02-24 01:59:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:11,678 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 261 transitions. [2022-02-24 01:59:11,678 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 01:59:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 261 transitions. [2022-02-24 01:59:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:59:11,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:11,679 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 01:59:11,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:59:11,679 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash -34960684, now seen corresponding path program 1 times [2022-02-24 01:59:11,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:11,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359484396] [2022-02-24 01:59:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:11,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:11,682 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,734 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 01:59:11,734 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:11,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359484396] [2022-02-24 01:59:11,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [359484396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:11,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:11,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:11,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509434337] [2022-02-24 01:59:11,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:11,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:11,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:11,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:11,735 INFO L87 Difference]: Start difference. First operand 147 states and 261 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 01:59:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:11,806 INFO L93 Difference]: Finished difference Result 191 states and 339 transitions. [2022-02-24 01:59:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:11,806 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 01:59:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:11,808 INFO L225 Difference]: With dead ends: 191 [2022-02-24 01:59:11,808 INFO L226 Difference]: Without dead ends: 189 [2022-02-24 01:59:11,808 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 01:59:11,811 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 117 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 140 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 01:59:11,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 140 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-24 01:59:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 147. [2022-02-24 01:59:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.7902097902097902) internal successors, (256), 143 states have internal predecessors, (256), 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 01:59:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 259 transitions. [2022-02-24 01:59:11,836 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 259 transitions. Word has length 23 [2022-02-24 01:59:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:11,838 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 259 transitions. [2022-02-24 01:59:11,839 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 01:59:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 259 transitions. [2022-02-24 01:59:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:59:11,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:11,847 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 01:59:11,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:59:11,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1931535814, now seen corresponding path program 1 times [2022-02-24 01:59:11,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:11,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583793255] [2022-02-24 01:59:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:11,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:11,849 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:11,879 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 01:59:11,879 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:11,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583793255] [2022-02-24 01:59:11,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [583793255] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:11,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:11,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:11,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34710105] [2022-02-24 01:59:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:11,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:11,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:11,881 INFO L87 Difference]: Start difference. First operand 147 states and 259 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 01:59:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:11,962 INFO L93 Difference]: Finished difference Result 275 states and 491 transitions. [2022-02-24 01:59:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:11,962 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 01:59:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:11,964 INFO L225 Difference]: With dead ends: 275 [2022-02-24 01:59:11,964 INFO L226 Difference]: Without dead ends: 273 [2022-02-24 01:59:11,964 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 01:59:11,967 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 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 01:59:11,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 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 01:59:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-24 01:59:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 199. [2022-02-24 01:59:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 195 states have (on average 1.7743589743589743) internal successors, (346), 195 states have internal predecessors, (346), 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 01:59:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 349 transitions. [2022-02-24 01:59:11,986 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 349 transitions. Word has length 24 [2022-02-24 01:59:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:11,987 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 349 transitions. [2022-02-24 01:59:11,988 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 01:59:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 349 transitions. [2022-02-24 01:59:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:59:11,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:11,989 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 01:59:11,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:59:11,989 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash 920418564, now seen corresponding path program 1 times [2022-02-24 01:59:11,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:11,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164103356] [2022-02-24 01:59:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:11,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:11,991 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,049 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 01:59:12,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164103356] [2022-02-24 01:59:12,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164103356] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,049 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822759116] [2022-02-24 01:59:12,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,050 INFO L87 Difference]: Start difference. First operand 199 states and 349 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 01:59:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,132 INFO L93 Difference]: Finished difference Result 471 states and 835 transitions. [2022-02-24 01:59:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,132 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 01:59:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,134 INFO L225 Difference]: With dead ends: 471 [2022-02-24 01:59:12,134 INFO L226 Difference]: Without dead ends: 281 [2022-02-24 01:59:12,136 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 01:59:12,137 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 107 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 01:59:12,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 107 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-24 01:59:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2022-02-24 01:59:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 275 states have (on average 1.76) internal successors, (484), 275 states have internal predecessors, (484), 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 01:59:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 487 transitions. [2022-02-24 01:59:12,178 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 487 transitions. Word has length 24 [2022-02-24 01:59:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,178 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 487 transitions. [2022-02-24 01:59:12,178 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 01:59:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 487 transitions. [2022-02-24 01:59:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:59:12,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,180 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 01:59:12,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:59:12,180 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash -251718169, now seen corresponding path program 1 times [2022-02-24 01:59:12,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514762892] [2022-02-24 01:59:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,183 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,235 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 01:59:12,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514762892] [2022-02-24 01:59:12,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514762892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520430317] [2022-02-24 01:59:12,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,236 INFO L87 Difference]: Start difference. First operand 279 states and 487 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 01:59:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,312 INFO L93 Difference]: Finished difference Result 421 states and 733 transitions. [2022-02-24 01:59:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,314 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 01:59:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,315 INFO L225 Difference]: With dead ends: 421 [2022-02-24 01:59:12,315 INFO L226 Difference]: Without dead ends: 287 [2022-02-24 01:59:12,316 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 01:59:12,316 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 117 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 01:59:12,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 117 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-24 01:59:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2022-02-24 01:59:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 281 states have (on average 1.7366548042704626) internal successors, (488), 281 states have internal predecessors, (488), 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 01:59:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 491 transitions. [2022-02-24 01:59:12,330 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 491 transitions. Word has length 25 [2022-02-24 01:59:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,331 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 491 transitions. [2022-02-24 01:59:12,331 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 01:59:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 491 transitions. [2022-02-24 01:59:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:59:12,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,331 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 01:59:12,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:59:12,331 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1531581847, now seen corresponding path program 1 times [2022-02-24 01:59:12,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675367742] [2022-02-24 01:59:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,333 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,353 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 01:59:12,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675367742] [2022-02-24 01:59:12,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [675367742] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866262774] [2022-02-24 01:59:12,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,354 INFO L87 Difference]: Start difference. First operand 285 states and 491 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 01:59:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,437 INFO L93 Difference]: Finished difference Result 525 states and 917 transitions. [2022-02-24 01:59:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,437 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 01:59:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,439 INFO L225 Difference]: With dead ends: 525 [2022-02-24 01:59:12,439 INFO L226 Difference]: Without dead ends: 523 [2022-02-24 01:59:12,439 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 01:59:12,441 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 164 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 81 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 01:59:12,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 81 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-24 01:59:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 393. [2022-02-24 01:59:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 389 states have (on average 1.7069408740359897) internal successors, (664), 389 states have internal predecessors, (664), 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 01:59:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 667 transitions. [2022-02-24 01:59:12,460 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 667 transitions. Word has length 25 [2022-02-24 01:59:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,460 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 667 transitions. [2022-02-24 01:59:12,461 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 01:59:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 667 transitions. [2022-02-24 01:59:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:59:12,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,461 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 01:59:12,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:59:12,461 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1752268199, now seen corresponding path program 1 times [2022-02-24 01:59:12,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835730283] [2022-02-24 01:59:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,463 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,503 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 01:59:12,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835730283] [2022-02-24 01:59:12,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [835730283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450108209] [2022-02-24 01:59:12,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,504 INFO L87 Difference]: Start difference. First operand 393 states and 667 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 01:59:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,598 INFO L93 Difference]: Finished difference Result 925 states and 1581 transitions. [2022-02-24 01:59:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,598 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 01:59:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,601 INFO L225 Difference]: With dead ends: 925 [2022-02-24 01:59:12,601 INFO L226 Difference]: Without dead ends: 547 [2022-02-24 01:59:12,602 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 01:59:12,603 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:12,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 109 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-02-24 01:59:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2022-02-24 01:59:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.6931608133086875) internal successors, (916), 541 states have internal predecessors, (916), 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 01:59:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 919 transitions. [2022-02-24 01:59:12,633 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 919 transitions. Word has length 25 [2022-02-24 01:59:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,633 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 919 transitions. [2022-02-24 01:59:12,633 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 01:59:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 919 transitions. [2022-02-24 01:59:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:59:12,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,634 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 01:59:12,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:59:12,635 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash -234182919, now seen corresponding path program 1 times [2022-02-24 01:59:12,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205090583] [2022-02-24 01:59:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,637 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,667 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 01:59:12,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205090583] [2022-02-24 01:59:12,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [205090583] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349382462] [2022-02-24 01:59:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,668 INFO L87 Difference]: Start difference. First operand 545 states and 919 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 01:59:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,749 INFO L93 Difference]: Finished difference Result 817 states and 1373 transitions. [2022-02-24 01:59:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,750 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 01:59:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,752 INFO L225 Difference]: With dead ends: 817 [2022-02-24 01:59:12,752 INFO L226 Difference]: Without dead ends: 555 [2022-02-24 01:59:12,753 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 01:59:12,753 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 141 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:12,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 114 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-02-24 01:59:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2022-02-24 01:59:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 549 states have (on average 1.668488160291439) internal successors, (916), 549 states have internal predecessors, (916), 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 01:59:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 919 transitions. [2022-02-24 01:59:12,784 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 919 transitions. Word has length 26 [2022-02-24 01:59:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,784 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 919 transitions. [2022-02-24 01:59:12,784 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 01:59:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 919 transitions. [2022-02-24 01:59:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:59:12,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,785 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 01:59:12,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:59:12,785 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1514046597, now seen corresponding path program 1 times [2022-02-24 01:59:12,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349490081] [2022-02-24 01:59:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,795 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:12,820 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 01:59:12,820 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:12,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349490081] [2022-02-24 01:59:12,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349490081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:12,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:12,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:12,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265840399] [2022-02-24 01:59:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:12,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:12,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:12,822 INFO L87 Difference]: Start difference. First operand 553 states and 919 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 01:59:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:12,939 INFO L93 Difference]: Finished difference Result 1005 states and 1697 transitions. [2022-02-24 01:59:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:12,939 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 01:59:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:12,943 INFO L225 Difference]: With dead ends: 1005 [2022-02-24 01:59:12,943 INFO L226 Difference]: Without dead ends: 1003 [2022-02-24 01:59:12,944 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 01:59:12,944 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 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, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:12,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-02-24 01:59:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 777. [2022-02-24 01:59:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 773 states have (on average 1.630012936610608) internal successors, (1260), 773 states have internal predecessors, (1260), 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 01:59:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1263 transitions. [2022-02-24 01:59:12,987 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1263 transitions. Word has length 26 [2022-02-24 01:59:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:12,987 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 1263 transitions. [2022-02-24 01:59:12,988 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 01:59:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1263 transitions. [2022-02-24 01:59:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:59:12,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:12,989 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 01:59:12,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:59:12,989 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1769803449, now seen corresponding path program 1 times [2022-02-24 01:59:12,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:12,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610180186] [2022-02-24 01:59:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:12,992 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,021 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 01:59:13,022 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610180186] [2022-02-24 01:59:13,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1610180186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,022 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331871696] [2022-02-24 01:59:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,023 INFO L87 Difference]: Start difference. First operand 777 states and 1263 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 01:59:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,158 INFO L93 Difference]: Finished difference Result 1821 states and 2977 transitions. [2022-02-24 01:59:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,158 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 01:59:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,162 INFO L225 Difference]: With dead ends: 1821 [2022-02-24 01:59:13,162 INFO L226 Difference]: Without dead ends: 1067 [2022-02-24 01:59:13,163 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 01:59:13,164 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 111 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 01:59:13,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 111 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:13,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-02-24 01:59:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1065. [2022-02-24 01:59:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1061 states have (on average 1.6173421300659756) internal successors, (1716), 1061 states have internal predecessors, (1716), 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 01:59:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1719 transitions. [2022-02-24 01:59:13,227 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1719 transitions. Word has length 26 [2022-02-24 01:59:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:13,227 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 1719 transitions. [2022-02-24 01:59:13,227 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 01:59:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1719 transitions. [2022-02-24 01:59:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:59:13,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:13,228 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 01:59:13,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:59:13,228 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash 309410172, now seen corresponding path program 1 times [2022-02-24 01:59:13,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:13,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958556580] [2022-02-24 01:59:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:13,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:13,230 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 01:59:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,256 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 01:59:13,256 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958556580] [2022-02-24 01:59:13,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958556580] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231740855] [2022-02-24 01:59:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,257 INFO L87 Difference]: Start difference. First operand 1065 states and 1719 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 01:59:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,392 INFO L93 Difference]: Finished difference Result 1597 states and 2569 transitions. [2022-02-24 01:59:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 01:59:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,396 INFO L225 Difference]: With dead ends: 1597 [2022-02-24 01:59:13,396 INFO L226 Difference]: Without dead ends: 1083 [2022-02-24 01:59:13,397 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 01:59:13,397 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:13,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-02-24 01:59:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2022-02-24 01:59:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1077 states have (on average 1.5933147632311977) internal successors, (1716), 1077 states have internal predecessors, (1716), 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 01:59:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1719 transitions. [2022-02-24 01:59:13,460 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1719 transitions. Word has length 27 [2022-02-24 01:59:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:13,461 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1719 transitions. [2022-02-24 01:59:13,461 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 01:59:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1719 transitions. [2022-02-24 01:59:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:59:13,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:13,462 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 01:59:13,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:59:13,462 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:13,462 INFO L85 PathProgramCache]: Analyzing trace with hash -970453506, now seen corresponding path program 1 times [2022-02-24 01:59:13,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:13,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744608375] [2022-02-24 01:59:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:13,464 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,491 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 01:59:13,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744608375] [2022-02-24 01:59:13,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [744608375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539300841] [2022-02-24 01:59:13,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,493 INFO L87 Difference]: Start difference. First operand 1081 states and 1719 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 01:59:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:13,698 INFO L93 Difference]: Finished difference Result 1933 states and 3129 transitions. [2022-02-24 01:59:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:13,698 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 01:59:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:13,704 INFO L225 Difference]: With dead ends: 1933 [2022-02-24 01:59:13,704 INFO L226 Difference]: Without dead ends: 1931 [2022-02-24 01:59:13,706 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 01:59:13,707 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 79 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 01:59:13,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 79 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2022-02-24 01:59:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1545. [2022-02-24 01:59:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1541 states have (on average 1.5496430889033095) internal successors, (2388), 1541 states have internal predecessors, (2388), 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 01:59:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2391 transitions. [2022-02-24 01:59:13,831 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2391 transitions. Word has length 27 [2022-02-24 01:59:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:13,831 INFO L470 AbstractCegarLoop]: Abstraction has 1545 states and 2391 transitions. [2022-02-24 01:59:13,832 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 01:59:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2391 transitions. [2022-02-24 01:59:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:59:13,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:13,833 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 01:59:13,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:59:13,834 INFO L402 AbstractCegarLoop]: === Iteration 16 === 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 -1981570756, 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 [1384067956] [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 01:59:13,838 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:13,877 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 01:59:13,877 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:13,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384067956] [2022-02-24 01:59:13,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384067956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:13,877 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:13,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:13,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665443374] [2022-02-24 01:59:13,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:13,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:13,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:13,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:13,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:13,878 INFO L87 Difference]: Start difference. First operand 1545 states and 2391 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 01:59:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,075 INFO L93 Difference]: Finished difference Result 3597 states and 5593 transitions. [2022-02-24 01:59:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,076 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 01:59:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,081 INFO L225 Difference]: With dead ends: 3597 [2022-02-24 01:59:14,081 INFO L226 Difference]: Without dead ends: 2091 [2022-02-24 01:59:14,085 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 01:59:14,086 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 113 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-02-24 01:59:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2089. [2022-02-24 01:59:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2085 states have (on average 1.5366906474820143) internal successors, (3204), 2085 states have internal predecessors, (3204), 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 01:59:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3207 transitions. [2022-02-24 01:59:14,247 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3207 transitions. Word has length 27 [2022-02-24 01:59:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,247 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 3207 transitions. [2022-02-24 01:59:14,247 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 01:59:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3207 transitions. [2022-02-24 01:59:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:59:14,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,249 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 01:59:14,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:59:14,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -19072850, now seen corresponding path program 1 times [2022-02-24 01:59:14,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909110551] [2022-02-24 01:59:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,251 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,269 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 01:59:14,269 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909110551] [2022-02-24 01:59:14,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909110551] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846923855] [2022-02-24 01:59:14,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,271 INFO L87 Difference]: Start difference. First operand 2089 states and 3207 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 01:59:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,452 INFO L93 Difference]: Finished difference Result 3133 states and 4793 transitions. [2022-02-24 01:59:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,453 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 01:59:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,458 INFO L225 Difference]: With dead ends: 3133 [2022-02-24 01:59:14,458 INFO L226 Difference]: Without dead ends: 2123 [2022-02-24 01:59:14,460 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 01:59:14,461 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 108 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-02-24 01:59:14,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2121. [2022-02-24 01:59:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2117 states have (on average 1.5134624468587623) internal successors, (3204), 2117 states have internal predecessors, (3204), 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 01:59:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3207 transitions. [2022-02-24 01:59:14,626 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3207 transitions. Word has length 28 [2022-02-24 01:59:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:14,627 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 3207 transitions. [2022-02-24 01:59:14,628 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 01:59:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3207 transitions. [2022-02-24 01:59:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:59:14,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:14,632 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 01:59:14,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:59:14,632 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:14,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:14,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1298936528, now seen corresponding path program 1 times [2022-02-24 01:59:14,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:14,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643674607] [2022-02-24 01:59:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:14,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:14,635 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:14,654 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 01:59:14,654 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:14,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643674607] [2022-02-24 01:59:14,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1643674607] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:14,655 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:14,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:14,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007984618] [2022-02-24 01:59:14,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:14,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:14,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:14,655 INFO L87 Difference]: Start difference. First operand 2121 states and 3207 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 01:59:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:14,945 INFO L93 Difference]: Finished difference Result 3725 states and 5737 transitions. [2022-02-24 01:59:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:14,945 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 01:59:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:14,956 INFO L225 Difference]: With dead ends: 3725 [2022-02-24 01:59:14,956 INFO L226 Difference]: Without dead ends: 3723 [2022-02-24 01:59:14,957 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 01:59:14,957 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:14,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 78 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-02-24 01:59:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3081. [2022-02-24 01:59:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3077 states have (on average 1.4676633084172896) internal successors, (4516), 3077 states have internal predecessors, (4516), 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 01:59:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4519 transitions. [2022-02-24 01:59:15,193 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4519 transitions. Word has length 28 [2022-02-24 01:59:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:15,193 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 4519 transitions. [2022-02-24 01:59:15,193 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 01:59:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4519 transitions. [2022-02-24 01:59:15,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:59:15,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:15,197 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 01:59:15,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:59:15,197 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1984913518, now seen corresponding path program 1 times [2022-02-24 01:59:15,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:15,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825062184] [2022-02-24 01:59:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:15,199 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,217 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 01:59:15,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:15,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825062184] [2022-02-24 01:59:15,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825062184] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:15,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:15,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:15,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383024556] [2022-02-24 01:59:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:15,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:15,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:15,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:15,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:15,218 INFO L87 Difference]: Start difference. First operand 3081 states and 4519 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 01:59:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:15,551 INFO L93 Difference]: Finished difference Result 7117 states and 10473 transitions. [2022-02-24 01:59:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:15,551 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 01:59:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:15,564 INFO L225 Difference]: With dead ends: 7117 [2022-02-24 01:59:15,564 INFO L226 Difference]: Without dead ends: 4107 [2022-02-24 01:59:15,569 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 01:59:15,570 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:15,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 115 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-02-24 01:59:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2022-02-24 01:59:15,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4101 states have (on average 1.4523287003169958) internal successors, (5956), 4101 states have internal predecessors, (5956), 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 01:59:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5959 transitions. [2022-02-24 01:59:15,914 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5959 transitions. Word has length 28 [2022-02-24 01:59:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:15,915 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 5959 transitions. [2022-02-24 01:59:15,915 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 01:59:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5959 transitions. [2022-02-24 01:59:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:59:15,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:15,918 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 01:59:15,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:59:15,918 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:15,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1612111599, now seen corresponding path program 1 times [2022-02-24 01:59:15,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:15,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364888165] [2022-02-24 01:59:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:15,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:15,920 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:15,950 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 01:59:15,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:15,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364888165] [2022-02-24 01:59:15,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1364888165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:15,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:15,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:15,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380278499] [2022-02-24 01:59:15,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:15,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:15,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:15,951 INFO L87 Difference]: Start difference. First operand 4105 states and 5959 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 01:59:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:16,294 INFO L93 Difference]: Finished difference Result 6157 states and 8905 transitions. [2022-02-24 01:59:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:16,294 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 01:59:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:16,304 INFO L225 Difference]: With dead ends: 6157 [2022-02-24 01:59:16,304 INFO L226 Difference]: Without dead ends: 4171 [2022-02-24 01:59:16,309 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 01:59:16,309 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 138 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:16,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 105 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2022-02-24 01:59:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4169. [2022-02-24 01:59:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4165 states have (on average 1.4300120048019207) internal successors, (5956), 4165 states have internal predecessors, (5956), 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 01:59:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 5959 transitions. [2022-02-24 01:59:16,665 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 5959 transitions. Word has length 29 [2022-02-24 01:59:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:16,665 INFO L470 AbstractCegarLoop]: Abstraction has 4169 states and 5959 transitions. [2022-02-24 01:59:16,666 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 01:59:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 5959 transitions. [2022-02-24 01:59:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:59:16,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:16,669 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 01:59:16,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:59:16,669 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1402992019, now seen corresponding path program 1 times [2022-02-24 01:59:16,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:16,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103059144] [2022-02-24 01:59:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:16,671 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:16,674 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 01:59:16,685 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 01:59:16,686 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:16,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103059144] [2022-02-24 01:59:16,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103059144] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:16,686 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:16,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:16,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115085533] [2022-02-24 01:59:16,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:16,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:16,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:16,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:16,687 INFO L87 Difference]: Start difference. First operand 4169 states and 5959 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 01:59:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:17,227 INFO L93 Difference]: Finished difference Result 7181 states and 10441 transitions. [2022-02-24 01:59:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:17,227 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 01:59:17,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:17,239 INFO L225 Difference]: With dead ends: 7181 [2022-02-24 01:59:17,239 INFO L226 Difference]: Without dead ends: 7179 [2022-02-24 01:59:17,241 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 01:59:17,242 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:17,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2022-02-24 01:59:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6153. [2022-02-24 01:59:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6149 states have (on average 1.3849406407545943) internal successors, (8516), 6149 states have internal predecessors, (8516), 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 01:59:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8519 transitions. [2022-02-24 01:59:17,688 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8519 transitions. Word has length 29 [2022-02-24 01:59:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:17,688 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 8519 transitions. [2022-02-24 01:59:17,688 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 01:59:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8519 transitions. [2022-02-24 01:59:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:59:17,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:17,694 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 01:59:17,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:59:17,695 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash 391874769, now seen corresponding path program 1 times [2022-02-24 01:59:17,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:17,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245046131] [2022-02-24 01:59:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:17,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:17,696 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:17,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:17,714 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 01:59:17,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:17,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245046131] [2022-02-24 01:59:17,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [245046131] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:17,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:17,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:17,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022394859] [2022-02-24 01:59:17,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:17,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:17,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:17,715 INFO L87 Difference]: Start difference. First operand 6153 states and 8519 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 01:59:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:18,400 INFO L93 Difference]: Finished difference Result 14093 states and 19529 transitions. [2022-02-24 01:59:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:18,402 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 01:59:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:18,416 INFO L225 Difference]: With dead ends: 14093 [2022-02-24 01:59:18,416 INFO L226 Difference]: Without dead ends: 8075 [2022-02-24 01:59:18,428 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 01:59:18,429 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 121 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:18,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 117 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2022-02-24 01:59:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8073. [2022-02-24 01:59:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8069 states have (on average 1.3647292105589293) internal successors, (11012), 8069 states have internal predecessors, (11012), 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 01:59:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 11015 transitions. [2022-02-24 01:59:19,125 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 11015 transitions. Word has length 29 [2022-02-24 01:59:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:19,125 INFO L470 AbstractCegarLoop]: Abstraction has 8073 states and 11015 transitions. [2022-02-24 01:59:19,126 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 01:59:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 11015 transitions. [2022-02-24 01:59:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:59:19,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:19,132 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 01:59:19,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:59:19,132 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 543295075, now seen corresponding path program 1 times [2022-02-24 01:59:19,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:19,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371368898] [2022-02-24 01:59:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:19,134 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:19,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:19,149 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 01:59:19,150 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:19,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371368898] [2022-02-24 01:59:19,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [371368898] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:19,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:19,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:19,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306947274] [2022-02-24 01:59:19,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:19,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:19,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:19,150 INFO L87 Difference]: Start difference. First operand 8073 states and 11015 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 01:59:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:19,817 INFO L93 Difference]: Finished difference Result 12109 states and 16457 transitions. [2022-02-24 01:59:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:19,817 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 01:59:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:19,830 INFO L225 Difference]: With dead ends: 12109 [2022-02-24 01:59:19,830 INFO L226 Difference]: Without dead ends: 8203 [2022-02-24 01:59:19,837 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 01:59:19,837 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:19,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 102 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2022-02-24 01:59:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8201. [2022-02-24 01:59:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8197 states have (on average 1.3434183237769917) internal successors, (11012), 8197 states have internal predecessors, (11012), 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 01:59:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11015 transitions. [2022-02-24 01:59:20,430 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11015 transitions. Word has length 30 [2022-02-24 01:59:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:20,430 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 11015 transitions. [2022-02-24 01:59:20,430 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 01:59:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11015 transitions. [2022-02-24 01:59:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:59:20,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:20,437 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 01:59:20,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:59:20,437 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash -736568603, now seen corresponding path program 1 times [2022-02-24 01:59:20,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:20,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700713559] [2022-02-24 01:59:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:20,439 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:20,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:20,466 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 01:59:20,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:20,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700713559] [2022-02-24 01:59:20,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700713559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:20,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:20,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:20,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555825809] [2022-02-24 01:59:20,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:20,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:20,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:20,468 INFO L87 Difference]: Start difference. First operand 8201 states and 11015 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 01:59:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:21,739 INFO L93 Difference]: Finished difference Result 13837 states and 18825 transitions. [2022-02-24 01:59:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:21,740 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 01:59:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:21,764 INFO L225 Difference]: With dead ends: 13837 [2022-02-24 01:59:21,765 INFO L226 Difference]: Without dead ends: 13835 [2022-02-24 01:59:21,770 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 01:59:21,772 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 129 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:21,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 76 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2022-02-24 01:59:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12297. [2022-02-24 01:59:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12297 states, 12293 states have (on average 1.3018791181973481) internal successors, (16004), 12293 states have internal predecessors, (16004), 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 01:59:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12297 states to 12297 states and 16007 transitions. [2022-02-24 01:59:23,011 INFO L78 Accepts]: Start accepts. Automaton has 12297 states and 16007 transitions. Word has length 30 [2022-02-24 01:59:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:23,012 INFO L470 AbstractCegarLoop]: Abstraction has 12297 states and 16007 transitions. [2022-02-24 01:59:23,012 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 01:59:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12297 states and 16007 transitions. [2022-02-24 01:59:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:59:23,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:23,025 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 01:59:23,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:59:23,025 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1747685853, now seen corresponding path program 1 times [2022-02-24 01:59:23,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:23,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146750501] [2022-02-24 01:59:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:23,028 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:23,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:23,046 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 01:59:23,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:23,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146750501] [2022-02-24 01:59:23,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1146750501] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:23,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:23,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:23,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727467112] [2022-02-24 01:59:23,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:23,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:23,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:23,047 INFO L87 Difference]: Start difference. First operand 12297 states and 16007 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 01:59:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:24,350 INFO L93 Difference]: Finished difference Result 27917 states and 36233 transitions. [2022-02-24 01:59:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:24,351 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 01:59:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:24,374 INFO L225 Difference]: With dead ends: 27917 [2022-02-24 01:59:24,374 INFO L226 Difference]: Without dead ends: 15883 [2022-02-24 01:59:24,397 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 01:59:24,398 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:24,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 119 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2022-02-24 01:59:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15881. [2022-02-24 01:59:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15877 states have (on average 1.2740442149020597) internal successors, (20228), 15877 states have internal predecessors, (20228), 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 01:59:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 20231 transitions. [2022-02-24 01:59:25,696 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 20231 transitions. Word has length 30 [2022-02-24 01:59:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:25,697 INFO L470 AbstractCegarLoop]: Abstraction has 15881 states and 20231 transitions. [2022-02-24 01:59:25,697 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 01:59:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 20231 transitions. [2022-02-24 01:59:25,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:59:25,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:25,709 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 01:59:25,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:59:25,709 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:25,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1358574426, now seen corresponding path program 1 times [2022-02-24 01:59:25,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:25,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941639267] [2022-02-24 01:59:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:25,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:25,712 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:25,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:25,730 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 01:59:25,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:25,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941639267] [2022-02-24 01:59:25,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [941639267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:25,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:25,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:25,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561336832] [2022-02-24 01:59:25,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:25,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:25,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:25,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:25,731 INFO L87 Difference]: Start difference. First operand 15881 states and 20231 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 01:59:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:27,129 INFO L93 Difference]: Finished difference Result 23821 states and 30217 transitions. [2022-02-24 01:59:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:27,129 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 01:59:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:27,152 INFO L225 Difference]: With dead ends: 23821 [2022-02-24 01:59:27,153 INFO L226 Difference]: Without dead ends: 16139 [2022-02-24 01:59:27,170 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 01:59:27,170 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:27,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 99 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2022-02-24 01:59:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16137. [2022-02-24 01:59:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16137 states, 16133 states have (on average 1.2538275584206284) internal successors, (20228), 16133 states have internal predecessors, (20228), 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 01:59:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 20231 transitions. [2022-02-24 01:59:28,689 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 20231 transitions. Word has length 31 [2022-02-24 01:59:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:28,689 INFO L470 AbstractCegarLoop]: Abstraction has 16137 states and 20231 transitions. [2022-02-24 01:59:28,689 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 01:59:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 20231 transitions. [2022-02-24 01:59:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:59:28,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:28,700 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 01:59:28,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:59:28,701 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1656529192, now seen corresponding path program 1 times [2022-02-24 01:59:28,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:28,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255059512] [2022-02-24 01:59:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:28,702 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:28,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:28,722 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 01:59:28,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:28,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255059512] [2022-02-24 01:59:28,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [255059512] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:28,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:28,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:28,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418792322] [2022-02-24 01:59:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:28,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:28,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:28,724 INFO L87 Difference]: Start difference. First operand 16137 states and 20231 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 01:59:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:31,153 INFO L93 Difference]: Finished difference Result 46861 states and 57609 transitions. [2022-02-24 01:59:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:31,153 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 01:59:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:31,208 INFO L225 Difference]: With dead ends: 46861 [2022-02-24 01:59:31,208 INFO L226 Difference]: Without dead ends: 31243 [2022-02-24 01:59:31,246 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 01:59:31,246 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 140 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:31,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2022-02-24 01:59:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31241. [2022-02-24 01:59:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31241 states, 31237 states have (on average 1.1966578096488139) internal successors, (37380), 31237 states have internal predecessors, (37380), 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 01:59:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31241 states to 31241 states and 37383 transitions. [2022-02-24 01:59:34,092 INFO L78 Accepts]: Start accepts. Automaton has 31241 states and 37383 transitions. Word has length 31 [2022-02-24 01:59:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:34,092 INFO L470 AbstractCegarLoop]: Abstraction has 31241 states and 37383 transitions. [2022-02-24 01:59:34,092 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 01:59:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 31241 states and 37383 transitions. [2022-02-24 01:59:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:59:34,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:34,115 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 01:59:34,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:59:34,116 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1627320854, now seen corresponding path program 1 times [2022-02-24 01:59:34,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:34,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077756624] [2022-02-24 01:59:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:34,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:34,118 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:34,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:34,134 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 01:59:34,135 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:34,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077756624] [2022-02-24 01:59:34,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077756624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:34,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:34,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:34,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273488144] [2022-02-24 01:59:34,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:34,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:34,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:34,136 INFO L87 Difference]: Start difference. First operand 31241 states and 37383 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 01:59:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:36,903 INFO L93 Difference]: Finished difference Result 33293 states and 40457 transitions. [2022-02-24 01:59:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:36,903 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 01:59:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:36,966 INFO L225 Difference]: With dead ends: 33293 [2022-02-24 01:59:36,967 INFO L226 Difference]: Without dead ends: 33291 [2022-02-24 01:59:36,983 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 01:59:36,984 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 85 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:36,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 108 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:59:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2022-02-24 01:59:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31241. [2022-02-24 01:59:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31241 states, 31237 states have (on average 1.1802669910682844) internal successors, (36868), 31237 states have internal predecessors, (36868), 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 01:59:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31241 states to 31241 states and 36871 transitions. [2022-02-24 01:59:40,050 INFO L78 Accepts]: Start accepts. Automaton has 31241 states and 36871 transitions. Word has length 31 [2022-02-24 01:59:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:40,051 INFO L470 AbstractCegarLoop]: Abstraction has 31241 states and 36871 transitions. [2022-02-24 01:59:40,051 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 01:59:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 31241 states and 36871 transitions. [2022-02-24 01:59:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:59:40,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:40,075 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 01:59:40,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:59:40,075 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -186986472, now seen corresponding path program 1 times [2022-02-24 01:59:40,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:40,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55939345] [2022-02-24 01:59:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:40,077 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:40,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:40,094 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 01:59:40,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:40,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55939345] [2022-02-24 01:59:40,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [55939345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:40,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:40,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:40,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704405388] [2022-02-24 01:59:40,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:40,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:40,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:40,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:40,097 INFO L87 Difference]: Start difference. First operand 31241 states and 36871 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 01:59:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:44,525 INFO L93 Difference]: Finished difference Result 50699 states and 59400 transitions. [2022-02-24 01:59:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:44,526 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 01:59:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:44,624 INFO L225 Difference]: With dead ends: 50699 [2022-02-24 01:59:44,624 INFO L226 Difference]: Without dead ends: 50697 [2022-02-24 01:59:44,647 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 01:59:44,648 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:44,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 73 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:59:44,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50697 states. [2022-02-24 01:59:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50697 to 48649. [2022-02-24 01:59:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48649 states, 48645 states have (on average 1.1578579504573954) internal successors, (56324), 48645 states have internal predecessors, (56324), 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 01:59:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48649 states to 48649 states and 56327 transitions. [2022-02-24 01:59:49,244 INFO L78 Accepts]: Start accepts. Automaton has 48649 states and 56327 transitions. Word has length 32 [2022-02-24 01:59:49,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:49,244 INFO L470 AbstractCegarLoop]: Abstraction has 48649 states and 56327 transitions. [2022-02-24 01:59:49,244 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 01:59:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 48649 states and 56327 transitions. [2022-02-24 01:59:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:59:49,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:59:49,292 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 01:59:49,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:59:49,292 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:59:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:59:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1198103722, now seen corresponding path program 1 times [2022-02-24 01:59:49,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:59:49,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748667561] [2022-02-24 01:59:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:59:49,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:59:49,294 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:59:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:49,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:59:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:59:49,310 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 01:59:49,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:59:49,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748667561] [2022-02-24 01:59:49,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [748667561] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:59:49,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:59:49,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:59:49,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884935364] [2022-02-24 01:59:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:59:49,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:59:49,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:59:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:59:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:59:49,312 INFO L87 Difference]: Start difference. First operand 48649 states and 56327 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 01:59:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:59:54,878 INFO L93 Difference]: Finished difference Result 109065 states and 124935 transitions. [2022-02-24 01:59:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:59:54,879 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 01:59:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:59:54,879 INFO L225 Difference]: With dead ends: 109065 [2022-02-24 01:59:54,879 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 01:59:55,017 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 01:59:55,018 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:59:55,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 122 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:59:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 01:59:55,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 01:59:55,018 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 01:59:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 01:59:55,018 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2022-02-24 01:59:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:59:55,019 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 01:59:55,019 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 01:59:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 01:59:55,019 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 01:59:55,021 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 01:59:55,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:59:55,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 02:02:01,980 WARN L232 SmtUtils]: Spent 2.11m on a formula simplification that was a NOOP. DAG size: 2112 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-02-24 02:12:12,597 WARN L232 SmtUtils]: Spent 10.18m on a formula simplification that was a NOOP. DAG size: 8251 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)