/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 04:24:34,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 04:24:34,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 04:24:34,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 04:24:34,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 04:24:34,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 04:24:34,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 04:24:34,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 04:24:34,545 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 04:24:34,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 04:24:34,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 04:24:34,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 04:24:34,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 04:24:34,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 04:24:34,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 04:24:34,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 04:24:34,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 04:24:34,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 04:24:34,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 04:24:34,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 04:24:34,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 04:24:34,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 04:24:34,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 04:24:34,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:24:34,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 04:24:34,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 04:24:34,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 04:24:34,548 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 04:24:34,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 04:24:34,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 04:24:34,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 04:24:34,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 04:24:34,718 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 04:24:34,719 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 04:24:34,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2022-02-15 04:24:34,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/075d229d3/b21db0664ffc405e8247d6d13d43af7a/FLAG4874593f0 [2022-02-15 04:24:35,074 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 04:24:35,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c [2022-02-15 04:24:35,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/075d229d3/b21db0664ffc405e8247d6d13d43af7a/FLAG4874593f0 [2022-02-15 04:24:35,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/075d229d3/b21db0664ffc405e8247d6d13d43af7a [2022-02-15 04:24:35,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 04:24:35,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 04:24:35,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 04:24:35,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 04:24:35,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 04:24:35,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2336cda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35, skipping insertion in model container [2022-02-15 04:24:35,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 04:24:35,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 04:24:35,662 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_13.c[4936,4949] [2022-02-15 04:24:35,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:24:35,669 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 04:24:35,687 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_13.c[4936,4949] [2022-02-15 04:24:35,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 04:24:35,695 INFO L208 MainTranslator]: Completed translation [2022-02-15 04:24:35,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35 WrapperNode [2022-02-15 04:24:35,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 04:24:35,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 04:24:35,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 04:24:35,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 04:24:35,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 04:24:35,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 04:24:35,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 04:24:35,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 04:24:35,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (1/1) ... [2022-02-15 04:24:35,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 04:24:35,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 04:24:35,785 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) [2022-02-15 04:24:35,814 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 [2022-02-15 04:24:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 04:24:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 04:24:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 04:24:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 04:24:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 04:24:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 04:24:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 04:24:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 04:24:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 04:24:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 04:24:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 04:24:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 04:24:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 04:24:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 04:24:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 04:24:35,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 04:24:35,898 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 04:24:35,902 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 04:24:36,165 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 04:24:36,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 04:24:36,170 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 04:24:36,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:24:36 BoogieIcfgContainer [2022-02-15 04:24:36,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 04:24:36,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 04:24:36,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 04:24:36,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 04:24:36,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 04:24:35" (1/3) ... [2022-02-15 04:24:36,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c462bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:24:36, skipping insertion in model container [2022-02-15 04:24:36,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 04:24:35" (2/3) ... [2022-02-15 04:24:36,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c462bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 04:24:36, skipping insertion in model container [2022-02-15 04:24:36,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 04:24:36" (3/3) ... [2022-02-15 04:24:36,191 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2022-02-15 04:24:36,195 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 04:24:36,195 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 04:24:36,224 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 04:24:36,228 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=QVASR [2022-02-15 04:24:36,228 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 04:24:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 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) [2022-02-15 04:24:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 04:24:36,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:36,256 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] [2022-02-15 04:24:36,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:36,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1751582771, now seen corresponding path program 1 times [2022-02-15 04:24:36,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:36,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914830021] [2022-02-15 04:24:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:36,325 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:36,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:36,445 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:36,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914830021] [2022-02-15 04:24:36,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [914830021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:36,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:36,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:36,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38974832] [2022-02-15 04:24:36,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:36,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:36,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:36,467 INFO L87 Difference]: Start difference. First operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.25) 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) [2022-02-15 04:24:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:36,609 INFO L93 Difference]: Finished difference Result 106 states and 187 transitions. [2022-02-15 04:24:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:36,611 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 [2022-02-15 04:24:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:36,619 INFO L225 Difference]: With dead ends: 106 [2022-02-15 04:24:36,620 INFO L226 Difference]: Without dead ends: 91 [2022-02-15 04:24:36,622 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 [2022-02-15 04:24:36,624 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 225 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:36,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-15 04:24:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-02-15 04:24:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 states have internal predecessors, (111), 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) [2022-02-15 04:24:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2022-02-15 04:24:36,656 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 24 [2022-02-15 04:24:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:36,657 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2022-02-15 04:24:36,657 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) [2022-02-15 04:24:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2022-02-15 04:24:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 04:24:36,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:36,658 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] [2022-02-15 04:24:36,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 04:24:36,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1522316171, now seen corresponding path program 1 times [2022-02-15 04:24:36,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:36,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641811697] [2022-02-15 04:24:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:36,661 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:36,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:36,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:36,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641811697] [2022-02-15 04:24:36,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [641811697] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:36,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:36,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:36,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210518349] [2022-02-15 04:24:36,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:36,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:36,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:36,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:36,713 INFO L87 Difference]: Start difference. First operand 63 states and 114 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) [2022-02-15 04:24:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:36,809 INFO L93 Difference]: Finished difference Result 148 states and 273 transitions. [2022-02-15 04:24:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:36,809 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 [2022-02-15 04:24:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:36,810 INFO L225 Difference]: With dead ends: 148 [2022-02-15 04:24:36,810 INFO L226 Difference]: Without dead ends: 91 [2022-02-15 04:24:36,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:24:36,813 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:36,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-15 04:24:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-02-15 04:24:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 85 states have internal predecessors, (159), 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) [2022-02-15 04:24:36,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 162 transitions. [2022-02-15 04:24:36,827 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 162 transitions. Word has length 24 [2022-02-15 04:24:36,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:36,827 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 162 transitions. [2022-02-15 04:24:36,827 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) [2022-02-15 04:24:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 162 transitions. [2022-02-15 04:24:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:24:36,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:36,828 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] [2022-02-15 04:24:36,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 04:24:36,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1535721358, now seen corresponding path program 1 times [2022-02-15 04:24:36,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:36,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049419728] [2022-02-15 04:24:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:36,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:36,831 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:36,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:36,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049419728] [2022-02-15 04:24:36,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049419728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:36,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:36,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:36,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794730486] [2022-02-15 04:24:36,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:36,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:36,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:36,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:36,874 INFO L87 Difference]: Start difference. First operand 89 states and 162 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) [2022-02-15 04:24:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:36,973 INFO L93 Difference]: Finished difference Result 136 states and 244 transitions. [2022-02-15 04:24:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:36,973 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 [2022-02-15 04:24:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:36,976 INFO L225 Difference]: With dead ends: 136 [2022-02-15 04:24:36,976 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 04:24:36,977 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 [2022-02-15 04:24:36,982 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:36,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 04:24:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-02-15 04:24:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.8295454545454546) internal successors, (161), 88 states have internal predecessors, (161), 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) [2022-02-15 04:24:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 164 transitions. [2022-02-15 04:24:36,996 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 164 transitions. Word has length 25 [2022-02-15 04:24:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:36,996 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 164 transitions. [2022-02-15 04:24:36,996 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) [2022-02-15 04:24:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 164 transitions. [2022-02-15 04:24:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:24:36,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:36,997 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] [2022-02-15 04:24:36,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 04:24:36,997 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -52626544, now seen corresponding path program 1 times [2022-02-15 04:24:36,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:36,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078113563] [2022-02-15 04:24:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:37,003 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:37,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:37,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078113563] [2022-02-15 04:24:37,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078113563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:37,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:37,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:37,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834951707] [2022-02-15 04:24:37,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:37,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:37,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:37,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:37,081 INFO L87 Difference]: Start difference. First operand 92 states and 164 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) [2022-02-15 04:24:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:37,177 INFO L93 Difference]: Finished difference Result 256 states and 468 transitions. [2022-02-15 04:24:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:37,178 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 [2022-02-15 04:24:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:37,179 INFO L225 Difference]: With dead ends: 256 [2022-02-15 04:24:37,179 INFO L226 Difference]: Without dead ends: 173 [2022-02-15 04:24:37,180 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 [2022-02-15 04:24:37,181 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 214 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:37,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 97 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-15 04:24:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-02-15 04:24:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.8323353293413174) internal successors, (306), 167 states have internal predecessors, (306), 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) [2022-02-15 04:24:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 309 transitions. [2022-02-15 04:24:37,224 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 309 transitions. Word has length 25 [2022-02-15 04:24:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:37,225 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 309 transitions. [2022-02-15 04:24:37,225 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) [2022-02-15 04:24:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 309 transitions. [2022-02-15 04:24:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 04:24:37,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:37,227 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] [2022-02-15 04:24:37,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 04:24:37,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 968441810, now seen corresponding path program 1 times [2022-02-15 04:24:37,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:37,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152095953] [2022-02-15 04:24:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:37,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:37,236 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:37,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:37,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152095953] [2022-02-15 04:24:37,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [152095953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:37,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:37,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:37,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22524824] [2022-02-15 04:24:37,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:37,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:37,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:37,305 INFO L87 Difference]: Start difference. First operand 171 states and 309 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) [2022-02-15 04:24:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:37,397 INFO L93 Difference]: Finished difference Result 223 states and 403 transitions. [2022-02-15 04:24:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:37,398 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 [2022-02-15 04:24:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:37,399 INFO L225 Difference]: With dead ends: 223 [2022-02-15 04:24:37,399 INFO L226 Difference]: Without dead ends: 221 [2022-02-15 04:24:37,400 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 [2022-02-15 04:24:37,401 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:37,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 164 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-15 04:24:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2022-02-15 04:24:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.8203592814371257) internal successors, (304), 167 states have internal predecessors, (304), 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) [2022-02-15 04:24:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 307 transitions. [2022-02-15 04:24:37,421 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 307 transitions. Word has length 25 [2022-02-15 04:24:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:37,421 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 307 transitions. [2022-02-15 04:24:37,422 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) [2022-02-15 04:24:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 307 transitions. [2022-02-15 04:24:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:24:37,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:37,432 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] [2022-02-15 04:24:37,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 04:24:37,433 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1631210112, now seen corresponding path program 1 times [2022-02-15 04:24:37,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:37,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876100904] [2022-02-15 04:24:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:37,435 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:37,488 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:37,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876100904] [2022-02-15 04:24:37,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876100904] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:37,488 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:37,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:37,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385102635] [2022-02-15 04:24:37,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:37,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:37,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:37,490 INFO L87 Difference]: Start difference. First operand 171 states and 307 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) [2022-02-15 04:24:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:37,582 INFO L93 Difference]: Finished difference Result 323 states and 587 transitions. [2022-02-15 04:24:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:37,582 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 [2022-02-15 04:24:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:37,585 INFO L225 Difference]: With dead ends: 323 [2022-02-15 04:24:37,585 INFO L226 Difference]: Without dead ends: 321 [2022-02-15 04:24:37,585 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 [2022-02-15 04:24:37,587 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 205 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:37,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-15 04:24:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2022-02-15 04:24:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.8061674008810573) internal successors, (410), 227 states have internal predecessors, (410), 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) [2022-02-15 04:24:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 413 transitions. [2022-02-15 04:24:37,612 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 413 transitions. Word has length 26 [2022-02-15 04:24:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 413 transitions. [2022-02-15 04:24:37,613 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) [2022-02-15 04:24:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 413 transitions. [2022-02-15 04:24:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 04:24:37,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:37,616 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] [2022-02-15 04:24:37,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 04:24:37,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1642688830, now seen corresponding path program 1 times [2022-02-15 04:24:37,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:37,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649628775] [2022-02-15 04:24:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:37,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:37,618 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:37,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:37,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649628775] [2022-02-15 04:24:37,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [649628775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:37,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:37,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:37,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982892475] [2022-02-15 04:24:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:37,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:37,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:37,668 INFO L87 Difference]: Start difference. First operand 231 states and 413 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) [2022-02-15 04:24:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:37,769 INFO L93 Difference]: Finished difference Result 551 states and 995 transitions. [2022-02-15 04:24:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:37,769 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 [2022-02-15 04:24:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:37,771 INFO L225 Difference]: With dead ends: 551 [2022-02-15 04:24:37,771 INFO L226 Difference]: Without dead ends: 329 [2022-02-15 04:24:37,772 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 [2022-02-15 04:24:37,773 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:37,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 123 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-15 04:24:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-02-15 04:24:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 323 states have (on average 1.7956656346749227) internal successors, (580), 323 states have internal predecessors, (580), 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) [2022-02-15 04:24:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 583 transitions. [2022-02-15 04:24:37,793 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 583 transitions. Word has length 26 [2022-02-15 04:24:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:37,793 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 583 transitions. [2022-02-15 04:24:37,793 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) [2022-02-15 04:24:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 583 transitions. [2022-02-15 04:24:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:24:37,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:37,794 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] [2022-02-15 04:24:37,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 04:24:37,794 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash 972307173, now seen corresponding path program 1 times [2022-02-15 04:24:37,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:37,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297224532] [2022-02-15 04:24:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:37,797 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:37,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:37,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297224532] [2022-02-15 04:24:37,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [297224532] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:37,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:37,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:37,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075483705] [2022-02-15 04:24:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:37,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:37,848 INFO L87 Difference]: Start difference. First operand 327 states and 583 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) [2022-02-15 04:24:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:37,935 INFO L93 Difference]: Finished difference Result 493 states and 877 transitions. [2022-02-15 04:24:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:37,936 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 [2022-02-15 04:24:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:37,939 INFO L225 Difference]: With dead ends: 493 [2022-02-15 04:24:37,939 INFO L226 Difference]: Without dead ends: 335 [2022-02-15 04:24:37,940 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 [2022-02-15 04:24:37,941 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 137 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 [2022-02-15 04:24:37,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 137 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-15 04:24:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2022-02-15 04:24:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 329 states have (on average 1.7750759878419453) internal successors, (584), 329 states have internal predecessors, (584), 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) [2022-02-15 04:24:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 587 transitions. [2022-02-15 04:24:37,965 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 587 transitions. Word has length 27 [2022-02-15 04:24:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:37,965 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 587 transitions. [2022-02-15 04:24:37,965 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) [2022-02-15 04:24:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 587 transitions. [2022-02-15 04:24:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:24:37,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:37,966 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] [2022-02-15 04:24:37,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 04:24:37,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash -616040729, now seen corresponding path program 1 times [2022-02-15 04:24:37,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:37,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016726059] [2022-02-15 04:24:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:37,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:37,978 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:38,023 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:38,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016726059] [2022-02-15 04:24:38,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016726059] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:38,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:38,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:38,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846776866] [2022-02-15 04:24:38,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:38,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:38,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:38,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:38,024 INFO L87 Difference]: Start difference. First operand 333 states and 587 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) [2022-02-15 04:24:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:38,113 INFO L93 Difference]: Finished difference Result 621 states and 1109 transitions. [2022-02-15 04:24:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:38,114 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 [2022-02-15 04:24:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:38,117 INFO L225 Difference]: With dead ends: 621 [2022-02-15 04:24:38,117 INFO L226 Difference]: Without dead ends: 619 [2022-02-15 04:24:38,118 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 [2022-02-15 04:24:38,119 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:38,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-15 04:24:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 457. [2022-02-15 04:24:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.7483443708609272) internal successors, (792), 453 states have internal predecessors, (792), 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) [2022-02-15 04:24:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 795 transitions. [2022-02-15 04:24:38,142 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 795 transitions. Word has length 27 [2022-02-15 04:24:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:38,143 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 795 transitions. [2022-02-15 04:24:38,143 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) [2022-02-15 04:24:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 795 transitions. [2022-02-15 04:24:38,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 04:24:38,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:38,144 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] [2022-02-15 04:24:38,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 04:24:38,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1637109083, now seen corresponding path program 1 times [2022-02-15 04:24:38,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:38,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277839939] [2022-02-15 04:24:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:38,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:38,146 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:38,181 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:38,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277839939] [2022-02-15 04:24:38,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1277839939] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:38,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:38,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:38,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270473500] [2022-02-15 04:24:38,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:38,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:38,183 INFO L87 Difference]: Start difference. First operand 457 states and 795 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) [2022-02-15 04:24:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:38,280 INFO L93 Difference]: Finished difference Result 1085 states and 1901 transitions. [2022-02-15 04:24:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:38,280 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 [2022-02-15 04:24:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:38,282 INFO L225 Difference]: With dead ends: 1085 [2022-02-15 04:24:38,282 INFO L226 Difference]: Without dead ends: 643 [2022-02-15 04:24:38,283 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 [2022-02-15 04:24:38,284 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:38,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 125 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-15 04:24:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 641. [2022-02-15 04:24:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 637 states have (on average 1.739403453689168) internal successors, (1108), 637 states have internal predecessors, (1108), 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) [2022-02-15 04:24:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1111 transitions. [2022-02-15 04:24:38,317 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1111 transitions. Word has length 27 [2022-02-15 04:24:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:38,317 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1111 transitions. [2022-02-15 04:24:38,317 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) [2022-02-15 04:24:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1111 transitions. [2022-02-15 04:24:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:24:38,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:38,318 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] [2022-02-15 04:24:38,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 04:24:38,318 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1917179981, now seen corresponding path program 1 times [2022-02-15 04:24:38,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:38,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152815082] [2022-02-15 04:24:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:38,320 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:38,340 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:38,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152815082] [2022-02-15 04:24:38,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1152815082] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:38,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:38,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:38,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404185662] [2022-02-15 04:24:38,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:38,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:38,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:38,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:38,341 INFO L87 Difference]: Start difference. First operand 641 states and 1111 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) [2022-02-15 04:24:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:38,443 INFO L93 Difference]: Finished difference Result 961 states and 1661 transitions. [2022-02-15 04:24:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:38,443 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 [2022-02-15 04:24:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:38,445 INFO L225 Difference]: With dead ends: 961 [2022-02-15 04:24:38,445 INFO L226 Difference]: Without dead ends: 651 [2022-02-15 04:24:38,446 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 [2022-02-15 04:24:38,446 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:38,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 134 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-15 04:24:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2022-02-15 04:24:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.7178294573643411) internal successors, (1108), 645 states have internal predecessors, (1108), 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) [2022-02-15 04:24:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1111 transitions. [2022-02-15 04:24:38,478 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1111 transitions. Word has length 28 [2022-02-15 04:24:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:38,478 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1111 transitions. [2022-02-15 04:24:38,478 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) [2022-02-15 04:24:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1111 transitions. [2022-02-15 04:24:38,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:24:38,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:38,479 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] [2022-02-15 04:24:38,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 04:24:38,479 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash 789439413, now seen corresponding path program 1 times [2022-02-15 04:24:38,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:38,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700160939] [2022-02-15 04:24:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:38,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:38,481 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:38,501 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:38,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700160939] [2022-02-15 04:24:38,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700160939] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:38,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:38,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:38,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052171585] [2022-02-15 04:24:38,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:38,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:38,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:38,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:38,502 INFO L87 Difference]: Start difference. First operand 649 states and 1111 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) [2022-02-15 04:24:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:38,615 INFO L93 Difference]: Finished difference Result 1197 states and 2081 transitions. [2022-02-15 04:24:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:38,615 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 [2022-02-15 04:24:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:38,619 INFO L225 Difference]: With dead ends: 1197 [2022-02-15 04:24:38,619 INFO L226 Difference]: Without dead ends: 1195 [2022-02-15 04:24:38,619 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 [2022-02-15 04:24:38,619 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:38,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-15 04:24:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-02-15 04:24:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.6825749167591566) internal successors, (1516), 901 states have internal predecessors, (1516), 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) [2022-02-15 04:24:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1519 transitions. [2022-02-15 04:24:38,677 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1519 transitions. Word has length 28 [2022-02-15 04:24:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:38,678 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1519 transitions. [2022-02-15 04:24:38,678 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) [2022-02-15 04:24:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1519 transitions. [2022-02-15 04:24:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 04:24:38,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:38,679 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, 1, 1, 1, 1, 1] [2022-02-15 04:24:38,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 04:24:38,679 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash -231628941, now seen corresponding path program 1 times [2022-02-15 04:24:38,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:38,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577368590] [2022-02-15 04:24:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:38,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:38,680 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:38,698 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:38,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577368590] [2022-02-15 04:24:38,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [577368590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:38,699 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:38,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:38,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447847385] [2022-02-15 04:24:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:38,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:38,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:38,700 INFO L87 Difference]: Start difference. First operand 905 states and 1519 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) [2022-02-15 04:24:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:38,825 INFO L93 Difference]: Finished difference Result 2141 states and 3617 transitions. [2022-02-15 04:24:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:38,825 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 [2022-02-15 04:24:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:38,829 INFO L225 Difference]: With dead ends: 2141 [2022-02-15 04:24:38,829 INFO L226 Difference]: Without dead ends: 1259 [2022-02-15 04:24:38,830 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 [2022-02-15 04:24:38,831 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:38,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:38,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-15 04:24:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1257. [2022-02-15 04:24:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1253 states have (on average 1.675977653631285) internal successors, (2100), 1253 states have internal predecessors, (2100), 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) [2022-02-15 04:24:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2103 transitions. [2022-02-15 04:24:38,926 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2103 transitions. Word has length 28 [2022-02-15 04:24:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:38,926 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 2103 transitions. [2022-02-15 04:24:38,926 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) [2022-02-15 04:24:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2103 transitions. [2022-02-15 04:24:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:24:38,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:38,927 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] [2022-02-15 04:24:38,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 04:24:38,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1296968198, now seen corresponding path program 1 times [2022-02-15 04:24:38,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:38,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147090176] [2022-02-15 04:24:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:38,929 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:38,948 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:38,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147090176] [2022-02-15 04:24:38,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147090176] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:38,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:38,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:38,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624551425] [2022-02-15 04:24:38,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:38,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:38,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:38,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:38,950 INFO L87 Difference]: Start difference. First operand 1257 states and 2103 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) [2022-02-15 04:24:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:39,085 INFO L93 Difference]: Finished difference Result 1885 states and 3145 transitions. [2022-02-15 04:24:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:39,085 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 [2022-02-15 04:24:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:39,089 INFO L225 Difference]: With dead ends: 1885 [2022-02-15 04:24:39,089 INFO L226 Difference]: Without dead ends: 1275 [2022-02-15 04:24:39,090 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 [2022-02-15 04:24:39,090 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:39,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-02-15 04:24:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-02-15 04:24:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1269 states have (on average 1.6548463356973995) internal successors, (2100), 1269 states have internal predecessors, (2100), 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) [2022-02-15 04:24:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2103 transitions. [2022-02-15 04:24:39,159 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2103 transitions. Word has length 29 [2022-02-15 04:24:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:39,160 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 2103 transitions. [2022-02-15 04:24:39,160 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) [2022-02-15 04:24:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2103 transitions. [2022-02-15 04:24:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:24:39,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:39,161 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] [2022-02-15 04:24:39,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 04:24:39,161 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:39,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1409651196, now seen corresponding path program 1 times [2022-02-15 04:24:39,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:39,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189886496] [2022-02-15 04:24:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:39,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:39,162 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:39,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:39,179 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:39,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189886496] [2022-02-15 04:24:39,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189886496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:39,179 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:39,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:39,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614437950] [2022-02-15 04:24:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:39,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:39,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:39,180 INFO L87 Difference]: Start difference. First operand 1273 states and 2103 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) [2022-02-15 04:24:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:39,388 INFO L93 Difference]: Finished difference Result 2317 states and 3897 transitions. [2022-02-15 04:24:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:39,388 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 [2022-02-15 04:24:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:39,396 INFO L225 Difference]: With dead ends: 2317 [2022-02-15 04:24:39,396 INFO L226 Difference]: Without dead ends: 2315 [2022-02-15 04:24:39,397 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 [2022-02-15 04:24:39,397 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:39,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-15 04:24:39,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1801. [2022-02-15 04:24:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1797 states have (on average 1.613800779076238) internal successors, (2900), 1797 states have internal predecessors, (2900), 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) [2022-02-15 04:24:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2903 transitions. [2022-02-15 04:24:39,532 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2903 transitions. Word has length 29 [2022-02-15 04:24:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:39,532 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2903 transitions. [2022-02-15 04:24:39,532 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) [2022-02-15 04:24:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2903 transitions. [2022-02-15 04:24:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 04:24:39,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:39,534 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] [2022-02-15 04:24:39,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 04:24:39,534 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash 388582842, now seen corresponding path program 1 times [2022-02-15 04:24:39,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:39,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394126633] [2022-02-15 04:24:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:39,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:39,535 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:39,552 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:39,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394126633] [2022-02-15 04:24:39,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [394126633] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:39,552 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:39,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:39,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734600661] [2022-02-15 04:24:39,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:39,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:39,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:39,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:39,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:39,553 INFO L87 Difference]: Start difference. First operand 1801 states and 2903 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) [2022-02-15 04:24:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:39,789 INFO L93 Difference]: Finished difference Result 4237 states and 6873 transitions. [2022-02-15 04:24:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:39,790 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 [2022-02-15 04:24:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:39,795 INFO L225 Difference]: With dead ends: 4237 [2022-02-15 04:24:39,796 INFO L226 Difference]: Without dead ends: 2475 [2022-02-15 04:24:39,798 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 [2022-02-15 04:24:39,799 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:39,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-15 04:24:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2022-02-15 04:24:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2469 states have (on average 1.608748481166464) internal successors, (3972), 2469 states have internal predecessors, (3972), 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) [2022-02-15 04:24:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3975 transitions. [2022-02-15 04:24:39,975 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3975 transitions. Word has length 29 [2022-02-15 04:24:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:39,975 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 3975 transitions. [2022-02-15 04:24:39,975 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) [2022-02-15 04:24:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3975 transitions. [2022-02-15 04:24:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:24:39,977 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:39,977 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] [2022-02-15 04:24:39,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 04:24:39,977 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash 749728232, now seen corresponding path program 1 times [2022-02-15 04:24:39,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:39,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158786915] [2022-02-15 04:24:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:39,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:39,979 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:39,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:39,999 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:39,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158786915] [2022-02-15 04:24:40,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1158786915] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:40,000 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:40,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:40,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894356636] [2022-02-15 04:24:40,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:40,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:40,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:40,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:40,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:40,001 INFO L87 Difference]: Start difference. First operand 2473 states and 3975 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) [2022-02-15 04:24:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:40,255 INFO L93 Difference]: Finished difference Result 3709 states and 5945 transitions. [2022-02-15 04:24:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:40,256 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 [2022-02-15 04:24:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:40,262 INFO L225 Difference]: With dead ends: 3709 [2022-02-15 04:24:40,262 INFO L226 Difference]: Without dead ends: 2507 [2022-02-15 04:24:40,264 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 [2022-02-15 04:24:40,265 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:40,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 128 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-02-15 04:24:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2505. [2022-02-15 04:24:40,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2501 states have (on average 1.5881647341063574) internal successors, (3972), 2501 states have internal predecessors, (3972), 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) [2022-02-15 04:24:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3975 transitions. [2022-02-15 04:24:40,455 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3975 transitions. Word has length 30 [2022-02-15 04:24:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:40,455 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 3975 transitions. [2022-02-15 04:24:40,455 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) [2022-02-15 04:24:40,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3975 transitions. [2022-02-15 04:24:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:24:40,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:40,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:40,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 04:24:40,457 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:40,458 INFO L85 PathProgramCache]: Analyzing trace with hash -838619670, now seen corresponding path program 1 times [2022-02-15 04:24:40,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:40,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493707684] [2022-02-15 04:24:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:40,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:40,459 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:40,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:40,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:40,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493707684] [2022-02-15 04:24:40,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [493707684] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:40,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:40,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:40,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486529451] [2022-02-15 04:24:40,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:40,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:40,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:40,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:40,477 INFO L87 Difference]: Start difference. First operand 2505 states and 3975 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) [2022-02-15 04:24:40,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:40,799 INFO L93 Difference]: Finished difference Result 4493 states and 7273 transitions. [2022-02-15 04:24:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:40,800 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 [2022-02-15 04:24:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:40,810 INFO L225 Difference]: With dead ends: 4493 [2022-02-15 04:24:40,810 INFO L226 Difference]: Without dead ends: 4491 [2022-02-15 04:24:40,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 04:24:40,811 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:40,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-02-15 04:24:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3593. [2022-02-15 04:24:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3589 states have (on average 1.5436054611312344) internal successors, (5540), 3589 states have internal predecessors, (5540), 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) [2022-02-15 04:24:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5543 transitions. [2022-02-15 04:24:41,074 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5543 transitions. Word has length 30 [2022-02-15 04:24:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:41,074 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 5543 transitions. [2022-02-15 04:24:41,074 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) [2022-02-15 04:24:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5543 transitions. [2022-02-15 04:24:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 04:24:41,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:41,078 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] [2022-02-15 04:24:41,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 04:24:41,078 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:41,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1859688024, now seen corresponding path program 1 times [2022-02-15 04:24:41,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:41,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154382917] [2022-02-15 04:24:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:41,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:41,080 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:41,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:41,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:41,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154382917] [2022-02-15 04:24:41,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [154382917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:41,110 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:41,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:41,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380876295] [2022-02-15 04:24:41,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:41,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:41,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:41,111 INFO L87 Difference]: Start difference. First operand 3593 states and 5543 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) [2022-02-15 04:24:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:41,542 INFO L93 Difference]: Finished difference Result 8397 states and 13033 transitions. [2022-02-15 04:24:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:41,542 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 [2022-02-15 04:24:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:41,555 INFO L225 Difference]: With dead ends: 8397 [2022-02-15 04:24:41,555 INFO L226 Difference]: Without dead ends: 4875 [2022-02-15 04:24:41,562 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 [2022-02-15 04:24:41,562 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:41,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-02-15 04:24:41,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4873. [2022-02-15 04:24:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4869 states have (on average 1.538714315054426) internal successors, (7492), 4869 states have internal predecessors, (7492), 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) [2022-02-15 04:24:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7495 transitions. [2022-02-15 04:24:41,966 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7495 transitions. Word has length 30 [2022-02-15 04:24:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:41,966 INFO L470 AbstractCegarLoop]: Abstraction has 4873 states and 7495 transitions. [2022-02-15 04:24:41,966 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) [2022-02-15 04:24:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7495 transitions. [2022-02-15 04:24:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:24:41,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:41,969 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] [2022-02-15 04:24:41,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 04:24:41,969 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:41,970 INFO L85 PathProgramCache]: Analyzing trace with hash -227191537, now seen corresponding path program 1 times [2022-02-15 04:24:41,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:41,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397676187] [2022-02-15 04:24:41,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:41,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:41,971 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:41,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:41,986 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:41,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397676187] [2022-02-15 04:24:41,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [397676187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:41,986 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:41,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:41,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190725575] [2022-02-15 04:24:41,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:41,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:41,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:41,987 INFO L87 Difference]: Start difference. First operand 4873 states and 7495 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) [2022-02-15 04:24:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:42,352 INFO L93 Difference]: Finished difference Result 7309 states and 11209 transitions. [2022-02-15 04:24:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:42,352 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 [2022-02-15 04:24:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:42,364 INFO L225 Difference]: With dead ends: 7309 [2022-02-15 04:24:42,364 INFO L226 Difference]: Without dead ends: 4939 [2022-02-15 04:24:42,368 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 [2022-02-15 04:24:42,369 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 164 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:42,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2022-02-15 04:24:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4937. [2022-02-15 04:24:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4933 states have (on average 1.5187512669774985) internal successors, (7492), 4933 states have internal predecessors, (7492), 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) [2022-02-15 04:24:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 7495 transitions. [2022-02-15 04:24:42,751 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 7495 transitions. Word has length 31 [2022-02-15 04:24:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:42,751 INFO L470 AbstractCegarLoop]: Abstraction has 4937 states and 7495 transitions. [2022-02-15 04:24:42,752 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) [2022-02-15 04:24:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 7495 transitions. [2022-02-15 04:24:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:24:42,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:42,755 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] [2022-02-15 04:24:42,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 04:24:42,755 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1815539439, now seen corresponding path program 1 times [2022-02-15 04:24:42,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:42,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672073807] [2022-02-15 04:24:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:42,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:42,757 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:42,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:42,772 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:42,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672073807] [2022-02-15 04:24:42,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [672073807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:42,772 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:42,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:42,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541920071] [2022-02-15 04:24:42,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:42,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:42,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:42,773 INFO L87 Difference]: Start difference. First operand 4937 states and 7495 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) [2022-02-15 04:24:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:43,450 INFO L93 Difference]: Finished difference Result 8717 states and 13513 transitions. [2022-02-15 04:24:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:43,451 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 [2022-02-15 04:24:43,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:43,463 INFO L225 Difference]: With dead ends: 8717 [2022-02-15 04:24:43,463 INFO L226 Difference]: Without dead ends: 8715 [2022-02-15 04:24:43,464 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 [2022-02-15 04:24:43,464 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:43,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8715 states. [2022-02-15 04:24:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8715 to 7177. [2022-02-15 04:24:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7173 states have (on average 1.4727450160323434) internal successors, (10564), 7173 states have internal predecessors, (10564), 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) [2022-02-15 04:24:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10567 transitions. [2022-02-15 04:24:44,108 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10567 transitions. Word has length 31 [2022-02-15 04:24:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:44,109 INFO L470 AbstractCegarLoop]: Abstraction has 7177 states and 10567 transitions. [2022-02-15 04:24:44,109 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) [2022-02-15 04:24:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10567 transitions. [2022-02-15 04:24:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 04:24:44,116 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:44,116 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] [2022-02-15 04:24:44,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 04:24:44,116 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1458359503, now seen corresponding path program 1 times [2022-02-15 04:24:44,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:44,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341759972] [2022-02-15 04:24:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:44,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:44,118 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:44,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:44,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:44,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341759972] [2022-02-15 04:24:44,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1341759972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:44,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:44,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:44,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243633916] [2022-02-15 04:24:44,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:44,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:44,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:44,135 INFO L87 Difference]: Start difference. First operand 7177 states and 10567 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) [2022-02-15 04:24:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:44,933 INFO L93 Difference]: Finished difference Result 16653 states and 24649 transitions. [2022-02-15 04:24:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:44,934 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 [2022-02-15 04:24:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:44,952 INFO L225 Difference]: With dead ends: 16653 [2022-02-15 04:24:44,953 INFO L226 Difference]: Without dead ends: 9611 [2022-02-15 04:24:44,966 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 [2022-02-15 04:24:44,966 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:44,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2022-02-15 04:24:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9609. [2022-02-15 04:24:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9609 states, 9605 states have (on average 1.4663196251952109) internal successors, (14084), 9605 states have internal predecessors, (14084), 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) [2022-02-15 04:24:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 14087 transitions. [2022-02-15 04:24:45,725 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 14087 transitions. Word has length 31 [2022-02-15 04:24:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:45,725 INFO L470 AbstractCegarLoop]: Abstraction has 9609 states and 14087 transitions. [2022-02-15 04:24:45,725 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) [2022-02-15 04:24:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 14087 transitions. [2022-02-15 04:24:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:24:45,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:45,732 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] [2022-02-15 04:24:45,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 04:24:45,732 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash -446932963, now seen corresponding path program 1 times [2022-02-15 04:24:45,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:45,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499193823] [2022-02-15 04:24:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:45,734 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:45,749 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:45,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499193823] [2022-02-15 04:24:45,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499193823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:45,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:45,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:45,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008691105] [2022-02-15 04:24:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:45,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:45,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:45,750 INFO L87 Difference]: Start difference. First operand 9609 states and 14087 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) [2022-02-15 04:24:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:46,501 INFO L93 Difference]: Finished difference Result 14413 states and 21065 transitions. [2022-02-15 04:24:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:46,501 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 [2022-02-15 04:24:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:46,513 INFO L225 Difference]: With dead ends: 14413 [2022-02-15 04:24:46,513 INFO L226 Difference]: Without dead ends: 9739 [2022-02-15 04:24:46,520 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 [2022-02-15 04:24:46,521 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:46,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 122 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2022-02-15 04:24:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9737. [2022-02-15 04:24:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9733 states have (on average 1.4470358573923765) internal successors, (14084), 9733 states have internal predecessors, (14084), 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) [2022-02-15 04:24:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 14087 transitions. [2022-02-15 04:24:47,307 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 14087 transitions. Word has length 32 [2022-02-15 04:24:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:47,307 INFO L470 AbstractCegarLoop]: Abstraction has 9737 states and 14087 transitions. [2022-02-15 04:24:47,308 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) [2022-02-15 04:24:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 14087 transitions. [2022-02-15 04:24:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:24:47,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:47,314 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] [2022-02-15 04:24:47,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 04:24:47,315 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2035280865, now seen corresponding path program 1 times [2022-02-15 04:24:47,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:47,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363028930] [2022-02-15 04:24:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:47,316 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:47,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:47,332 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:47,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363028930] [2022-02-15 04:24:47,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363028930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:47,332 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:47,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:47,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486783130] [2022-02-15 04:24:47,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:47,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:47,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:47,333 INFO L87 Difference]: Start difference. First operand 9737 states and 14087 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) [2022-02-15 04:24:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:48,746 INFO L93 Difference]: Finished difference Result 16909 states and 24969 transitions. [2022-02-15 04:24:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:48,746 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 [2022-02-15 04:24:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:48,766 INFO L225 Difference]: With dead ends: 16909 [2022-02-15 04:24:48,766 INFO L226 Difference]: Without dead ends: 16907 [2022-02-15 04:24:48,770 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 [2022-02-15 04:24:48,770 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:48,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16907 states. [2022-02-15 04:24:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16907 to 14345. [2022-02-15 04:24:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.4015759012621156) internal successors, (20100), 14341 states have internal predecessors, (20100), 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) [2022-02-15 04:24:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 20103 transitions. [2022-02-15 04:24:49,881 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 20103 transitions. Word has length 32 [2022-02-15 04:24:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:49,881 INFO L470 AbstractCegarLoop]: Abstraction has 14345 states and 20103 transitions. [2022-02-15 04:24:49,881 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) [2022-02-15 04:24:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 20103 transitions. [2022-02-15 04:24:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 04:24:49,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:49,893 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] [2022-02-15 04:24:49,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 04:24:49,893 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1238618077, now seen corresponding path program 1 times [2022-02-15 04:24:49,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:49,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727182435] [2022-02-15 04:24:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:49,895 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:49,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:49,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:49,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727182435] [2022-02-15 04:24:49,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1727182435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:49,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:49,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:49,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643003426] [2022-02-15 04:24:49,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:49,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:49,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:49,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:49,910 INFO L87 Difference]: Start difference. First operand 14345 states and 20103 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) [2022-02-15 04:24:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:51,421 INFO L93 Difference]: Finished difference Result 33037 states and 46473 transitions. [2022-02-15 04:24:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:51,421 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 [2022-02-15 04:24:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:51,445 INFO L225 Difference]: With dead ends: 33037 [2022-02-15 04:24:51,445 INFO L226 Difference]: Without dead ends: 18955 [2022-02-15 04:24:51,468 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 [2022-02-15 04:24:51,469 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:51,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 135 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18955 states. [2022-02-15 04:24:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18955 to 18953. [2022-02-15 04:24:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18953 states, 18949 states have (on average 1.3917357116470526) internal successors, (26372), 18949 states have internal predecessors, (26372), 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) [2022-02-15 04:24:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 26375 transitions. [2022-02-15 04:24:53,112 INFO L78 Accepts]: Start accepts. Automaton has 18953 states and 26375 transitions. Word has length 32 [2022-02-15 04:24:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:53,112 INFO L470 AbstractCegarLoop]: Abstraction has 18953 states and 26375 transitions. [2022-02-15 04:24:53,112 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) [2022-02-15 04:24:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 18953 states and 26375 transitions. [2022-02-15 04:24:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:24:53,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:53,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:53,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 04:24:53,126 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1331017764, now seen corresponding path program 1 times [2022-02-15 04:24:53,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:53,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984473545] [2022-02-15 04:24:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:53,128 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:53,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:53,143 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:53,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984473545] [2022-02-15 04:24:53,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [984473545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:53,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:53,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:53,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085858087] [2022-02-15 04:24:53,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:53,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:53,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:53,144 INFO L87 Difference]: Start difference. First operand 18953 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:54,663 INFO L93 Difference]: Finished difference Result 28429 states and 39433 transitions. [2022-02-15 04:24:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:24:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:54,688 INFO L225 Difference]: With dead ends: 28429 [2022-02-15 04:24:54,688 INFO L226 Difference]: Without dead ends: 19211 [2022-02-15 04:24:54,705 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 [2022-02-15 04:24:54,705 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:54,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19211 states. [2022-02-15 04:24:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19211 to 19209. [2022-02-15 04:24:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19209 states, 19205 states have (on average 1.37318406664931) internal successors, (26372), 19205 states have internal predecessors, (26372), 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) [2022-02-15 04:24:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19209 states to 19209 states and 26375 transitions. [2022-02-15 04:24:56,299 INFO L78 Accepts]: Start accepts. Automaton has 19209 states and 26375 transitions. Word has length 33 [2022-02-15 04:24:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:24:56,299 INFO L470 AbstractCegarLoop]: Abstraction has 19209 states and 26375 transitions. [2022-02-15 04:24:56,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 19209 states and 26375 transitions. [2022-02-15 04:24:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:24:56,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:24:56,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:24:56,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 04:24:56,312 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:24:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:24:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -257330138, now seen corresponding path program 1 times [2022-02-15 04:24:56,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:24:56,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627318740] [2022-02-15 04:24:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:24:56,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:24:56,313 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:24:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:56,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:24:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:24:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:24:56,349 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:24:56,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627318740] [2022-02-15 04:24:56,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [627318740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:24:56,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:24:56,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:24:56,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837216645] [2022-02-15 04:24:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:24:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:24:56,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:24:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:24:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:24:56,350 INFO L87 Difference]: Start difference. First operand 19209 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:24:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:24:59,428 INFO L93 Difference]: Finished difference Result 56077 states and 76041 transitions. [2022-02-15 04:24:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:24:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:24:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:24:59,487 INFO L225 Difference]: With dead ends: 56077 [2022-02-15 04:24:59,487 INFO L226 Difference]: Without dead ends: 37387 [2022-02-15 04:24:59,526 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 [2022-02-15 04:24:59,526 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:24:59,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 105 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:24:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-02-15 04:25:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 37385. [2022-02-15 04:25:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37381 states have (on average 1.3286963965651) internal successors, (49668), 37381 states have internal predecessors, (49668), 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) [2022-02-15 04:25:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49671 transitions. [2022-02-15 04:25:02,886 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49671 transitions. Word has length 33 [2022-02-15 04:25:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:02,887 INFO L470 AbstractCegarLoop]: Abstraction has 37385 states and 49671 transitions. [2022-02-15 04:25:02,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49671 transitions. [2022-02-15 04:25:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 04:25:02,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:02,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:02,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 04:25:02,909 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:02,910 INFO L85 PathProgramCache]: Analyzing trace with hash 763738216, now seen corresponding path program 1 times [2022-02-15 04:25:02,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:02,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931569149] [2022-02-15 04:25:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:02,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:02,911 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:02,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:02,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:02,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931569149] [2022-02-15 04:25:02,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1931569149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:02,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:02,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:02,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573755986] [2022-02-15 04:25:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:02,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:02,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:02,928 INFO L87 Difference]: Start difference. First operand 37385 states and 49671 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:06,774 INFO L93 Difference]: Finished difference Result 41485 states and 56841 transitions. [2022-02-15 04:25:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:06,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 04:25:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:06,833 INFO L225 Difference]: With dead ends: 41485 [2022-02-15 04:25:06,834 INFO L226 Difference]: Without dead ends: 41483 [2022-02-15 04:25:06,845 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 [2022-02-15 04:25:06,845 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 107 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:06,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 132 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41483 states. [2022-02-15 04:25:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41483 to 37385. [2022-02-15 04:25:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37381 states have (on average 1.3149995987266259) internal successors, (49156), 37381 states have internal predecessors, (49156), 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) [2022-02-15 04:25:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49159 transitions. [2022-02-15 04:25:10,270 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49159 transitions. Word has length 33 [2022-02-15 04:25:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:10,270 INFO L470 AbstractCegarLoop]: Abstraction has 37385 states and 49159 transitions. [2022-02-15 04:25:10,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49159 transitions. [2022-02-15 04:25:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:25:10,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:10,292 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, 1, 1] [2022-02-15 04:25:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 04:25:10,292 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash 612915794, now seen corresponding path program 1 times [2022-02-15 04:25:10,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:10,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682107416] [2022-02-15 04:25:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:10,303 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:10,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:10,350 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:10,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682107416] [2022-02-15 04:25:10,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682107416] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:10,350 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:10,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:10,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493904818] [2022-02-15 04:25:10,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:10,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:10,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:10,351 INFO L87 Difference]: Start difference. First operand 37385 states and 49159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:16,096 INFO L93 Difference]: Finished difference Result 62989 states and 83977 transitions. [2022-02-15 04:25:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 04:25:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:16,213 INFO L225 Difference]: With dead ends: 62989 [2022-02-15 04:25:16,214 INFO L226 Difference]: Without dead ends: 62987 [2022-02-15 04:25:16,237 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 [2022-02-15 04:25:16,237 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:16,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62987 states. [2022-02-15 04:25:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62987 to 56841. [2022-02-15 04:25:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56841 states, 56837 states have (on average 1.2792371166669598) internal successors, (72708), 56837 states have internal predecessors, (72708), 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) [2022-02-15 04:25:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56841 states to 56841 states and 72711 transitions. [2022-02-15 04:25:21,641 INFO L78 Accepts]: Start accepts. Automaton has 56841 states and 72711 transitions. Word has length 34 [2022-02-15 04:25:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:21,641 INFO L470 AbstractCegarLoop]: Abstraction has 56841 states and 72711 transitions. [2022-02-15 04:25:21,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 56841 states and 72711 transitions. [2022-02-15 04:25:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 04:25:21,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:21,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:21,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 04:25:21,682 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash -408152560, now seen corresponding path program 1 times [2022-02-15 04:25:21,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:21,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407491084] [2022-02-15 04:25:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:21,684 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:21,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:21,698 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:21,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407491084] [2022-02-15 04:25:21,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [407491084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:21,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:21,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:21,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790314455] [2022-02-15 04:25:21,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:21,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:21,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:21,699 INFO L87 Difference]: Start difference. First operand 56841 states and 72711 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:28,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:28,944 INFO L93 Difference]: Finished difference Result 129549 states and 165897 transitions. [2022-02-15 04:25:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 04:25:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:29,081 INFO L225 Difference]: With dead ends: 129549 [2022-02-15 04:25:29,082 INFO L226 Difference]: Without dead ends: 73227 [2022-02-15 04:25:29,164 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 [2022-02-15 04:25:29,165 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:29,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 139 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73227 states. [2022-02-15 04:25:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73227 to 73225. [2022-02-15 04:25:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73225 states, 73221 states have (on average 1.258709932942735) internal successors, (92164), 73221 states have internal predecessors, (92164), 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) [2022-02-15 04:25:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73225 states to 73225 states and 92167 transitions. [2022-02-15 04:25:36,505 INFO L78 Accepts]: Start accepts. Automaton has 73225 states and 92167 transitions. Word has length 34 [2022-02-15 04:25:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:36,505 INFO L470 AbstractCegarLoop]: Abstraction has 73225 states and 92167 transitions. [2022-02-15 04:25:36,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 73225 states and 92167 transitions. [2022-02-15 04:25:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:25:36,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:36,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:36,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 04:25:36,719 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:36,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1820736251, now seen corresponding path program 1 times [2022-02-15 04:25:36,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:36,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491163454] [2022-02-15 04:25:36,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:36,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:36,732 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:36,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:36,774 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:36,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491163454] [2022-02-15 04:25:36,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [491163454] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:36,774 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:36,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:36,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751299341] [2022-02-15 04:25:36,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:36,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:36,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:36,775 INFO L87 Difference]: Start difference. First operand 73225 states and 92167 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:25:43,862 INFO L93 Difference]: Finished difference Result 110605 states and 139273 transitions. [2022-02-15 04:25:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:25:43,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 04:25:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:25:44,010 INFO L225 Difference]: With dead ends: 110605 [2022-02-15 04:25:44,010 INFO L226 Difference]: Without dead ends: 74763 [2022-02-15 04:25:44,084 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 [2022-02-15 04:25:44,085 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:25:44,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 113 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:25:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74763 states. [2022-02-15 04:25:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74763 to 74761. [2022-02-15 04:25:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74761 states, 74757 states have (on average 1.2465454740024347) internal successors, (93188), 74757 states have internal predecessors, (93188), 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) [2022-02-15 04:25:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74761 states to 74761 states and 93191 transitions. [2022-02-15 04:25:52,062 INFO L78 Accepts]: Start accepts. Automaton has 74761 states and 93191 transitions. Word has length 35 [2022-02-15 04:25:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:25:52,062 INFO L470 AbstractCegarLoop]: Abstraction has 74761 states and 93191 transitions. [2022-02-15 04:25:52,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:25:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 74761 states and 93191 transitions. [2022-02-15 04:25:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:25:52,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:25:52,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:25:52,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 04:25:52,111 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:25:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:25:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash 232388349, now seen corresponding path program 1 times [2022-02-15 04:25:52,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:25:52,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320273865] [2022-02-15 04:25:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:25:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:25:52,114 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:25:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:25:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:25:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:25:52,151 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:25:52,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320273865] [2022-02-15 04:25:52,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [320273865] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:25:52,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:25:52,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:25:52,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572498492] [2022-02-15 04:25:52,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:25:52,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:25:52,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:25:52,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:25:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:25:52,152 INFO L87 Difference]: Start difference. First operand 74761 states and 93191 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:04,684 INFO L93 Difference]: Finished difference Result 122893 states and 153609 transitions. [2022-02-15 04:26:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 04:26:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:04,961 INFO L225 Difference]: With dead ends: 122893 [2022-02-15 04:26:04,961 INFO L226 Difference]: Without dead ends: 122891 [2022-02-15 04:26:05,005 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 [2022-02-15 04:26:05,006 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:05,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122891 states. [2022-02-15 04:26:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122891 to 114697. [2022-02-15 04:26:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114697 states, 114693 states have (on average 1.2142676536493073) internal successors, (139268), 114693 states have internal predecessors, (139268), 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) [2022-02-15 04:26:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114697 states to 114697 states and 139271 transitions. [2022-02-15 04:26:17,853 INFO L78 Accepts]: Start accepts. Automaton has 114697 states and 139271 transitions. Word has length 35 [2022-02-15 04:26:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:17,853 INFO L470 AbstractCegarLoop]: Abstraction has 114697 states and 139271 transitions. [2022-02-15 04:26:17,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 114697 states and 139271 transitions. [2022-02-15 04:26:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 04:26:17,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:17,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:17,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 04:26:17,956 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:17,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash -788680005, now seen corresponding path program 1 times [2022-02-15 04:26:17,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:17,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888827793] [2022-02-15 04:26:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:17,958 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:17,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:17,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:17,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888827793] [2022-02-15 04:26:17,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1888827793] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:17,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:17,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:17,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294764289] [2022-02-15 04:26:17,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:17,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:17,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:17,979 INFO L87 Difference]: Start difference. First operand 114697 states and 139271 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 04:26:33,304 INFO L93 Difference]: Finished difference Result 258061 states and 311305 transitions. [2022-02-15 04:26:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 04:26:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 04:26:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 04:26:33,782 INFO L225 Difference]: With dead ends: 258061 [2022-02-15 04:26:33,782 INFO L226 Difference]: Without dead ends: 145419 [2022-02-15 04:26:33,930 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 [2022-02-15 04:26:33,930 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 04:26:33,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 141 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 04:26:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145419 states. [2022-02-15 04:26:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145419 to 145417. [2022-02-15 04:26:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145417 states, 145413 states have (on average 1.1830854187727369) internal successors, (172036), 145413 states have internal predecessors, (172036), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145417 states to 145417 states and 172039 transitions. [2022-02-15 04:26:49,379 INFO L78 Accepts]: Start accepts. Automaton has 145417 states and 172039 transitions. Word has length 35 [2022-02-15 04:26:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 04:26:49,380 INFO L470 AbstractCegarLoop]: Abstraction has 145417 states and 172039 transitions. [2022-02-15 04:26:49,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 04:26:49,380 INFO L276 IsEmpty]: Start isEmpty. Operand 145417 states and 172039 transitions. [2022-02-15 04:26:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 04:26:49,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 04:26:49,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 04:26:49,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 04:26:49,485 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 04:26:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 04:26:49,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1385679611, now seen corresponding path program 1 times [2022-02-15 04:26:49,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 04:26:49,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86503956] [2022-02-15 04:26:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 04:26:49,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 04:26:49,487 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 04:26:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 04:26:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 04:26:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 04:26:49,538 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 04:26:49,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86503956] [2022-02-15 04:26:49,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [86503956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 04:26:49,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 04:26:49,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 04:26:49,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264351296] [2022-02-15 04:26:49,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 04:26:49,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 04:26:49,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 04:26:49,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 04:26:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 04:26:49,539 INFO L87 Difference]: Start difference. First operand 145417 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)