/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-05ce600 [2022-02-24 04:29:05,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 04:29:06,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 04:29:06,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 04:29:06,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 04:29:06,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 04:29:06,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 04:29:06,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 04:29:06,130 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 04:29:06,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 04:29:06,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 04:29:06,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 04:29:06,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 04:29:06,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 04:29:06,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 04:29:06,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 04:29:06,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 04:29:06,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 04:29:06,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 04:29:06,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 04:29:06,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 04:29:06,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 04:29:06,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 04:29:06,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:29:06,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 04:29:06,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 04:29:06,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 04:29:06,135 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 04:29:06,135 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 04:29:06,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 04:29:06,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 04:29:06,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 04:29:06,367 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 04:29:06,368 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 04:29:06,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2022-02-24 04:29:06,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfbbe2d3/2a04b93c8e5347328dfc9f7936fa14f2/FLAG8d6a42f44 [2022-02-24 04:29:06,831 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 04:29:06,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c [2022-02-24 04:29:06,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfbbe2d3/2a04b93c8e5347328dfc9f7936fa14f2/FLAG8d6a42f44 [2022-02-24 04:29:07,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bfbbe2d3/2a04b93c8e5347328dfc9f7936fa14f2 [2022-02-24 04:29:07,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 04:29:07,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 04:29:07,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 04:29:07,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 04:29:07,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 04:29:07,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@235314c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07, skipping insertion in model container [2022-02-24 04:29:07,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 04:29:07,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 04:29:07,413 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] [2022-02-24 04:29:07,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:29:07,421 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 04:29:07,451 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] [2022-02-24 04:29:07,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 04:29:07,463 INFO L208 MainTranslator]: Completed translation [2022-02-24 04:29:07,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07 WrapperNode [2022-02-24 04:29:07,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 04:29:07,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 04:29:07,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 04:29:07,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 04:29:07,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 04:29:07,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 04:29:07,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 04:29:07,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 04:29:07,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (1/1) ... [2022-02-24 04:29:07,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 04:29:07,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 04:29:07,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 04:29:07,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 04:29:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 04:29:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 04:29:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 04:29:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 04:29:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 04:29:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 04:29:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 04:29:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 04:29:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 04:29:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 04:29:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 04:29:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 04:29:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 04:29:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 04:29:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 04:29:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 04:29:07,663 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 04:29:07,665 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 04:29:07,895 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 04:29:07,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 04:29:07,901 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 04:29:07,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:29:07 BoogieIcfgContainer [2022-02-24 04:29:07,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 04:29:07,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 04:29:07,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 04:29:07,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 04:29:07,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:29:07" (1/3) ... [2022-02-24 04:29:07,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1429518b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:29:07, skipping insertion in model container [2022-02-24 04:29:07,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:29:07" (2/3) ... [2022-02-24 04:29:07,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1429518b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:29:07, skipping insertion in model container [2022-02-24 04:29:07,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:29:07" (3/3) ... [2022-02-24 04:29:07,918 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2022-02-24 04:29:07,922 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 04:29:07,923 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 04:29:07,969 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 04:29:07,980 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 [2022-02-24 04:29:07,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 04:29:08,001 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) [2022-02-24 04:29:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 04:29:08,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:08,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:08,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:08,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1751582771, now seen corresponding path program 1 times [2022-02-24 04:29:08,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:08,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323778731] [2022-02-24 04:29:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:08,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:08,100 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:08,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:08,347 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:08,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323778731] [2022-02-24 04:29:08,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [323778731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:08,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:08,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:08,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063690869] [2022-02-24 04:29:08,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:08,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:08,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:08,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:08,383 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) [2022-02-24 04:29:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:08,619 INFO L93 Difference]: Finished difference Result 106 states and 187 transitions. [2022-02-24 04:29:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 04:29:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:08,635 INFO L225 Difference]: With dead ends: 106 [2022-02-24 04:29:08,636 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 04:29:08,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:08,642 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 04:29:08,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 04:29:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 04:29:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-02-24 04:29:08,710 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) [2022-02-24 04:29:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2022-02-24 04:29:08,713 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 24 [2022-02-24 04:29:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:08,714 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2022-02-24 04:29:08,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2022-02-24 04:29:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 04:29:08,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:08,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:08,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 04:29:08,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1522316171, now seen corresponding path program 1 times [2022-02-24 04:29:08,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:08,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940357659] [2022-02-24 04:29:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:08,720 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:08,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:08,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:08,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940357659] [2022-02-24 04:29:08,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940357659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:08,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:08,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:08,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218019217] [2022-02-24 04:29:08,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:08,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:08,795 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) [2022-02-24 04:29:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:08,931 INFO L93 Difference]: Finished difference Result 148 states and 273 transitions. [2022-02-24 04:29:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:08,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 04:29:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:08,933 INFO L225 Difference]: With dead ends: 148 [2022-02-24 04:29:08,933 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 04:29:08,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:08,935 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 [2022-02-24 04:29:08,936 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] [2022-02-24 04:29:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 04:29:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-02-24 04:29:08,953 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) [2022-02-24 04:29:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 162 transitions. [2022-02-24 04:29:08,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 162 transitions. Word has length 24 [2022-02-24 04:29:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:08,956 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 162 transitions. [2022-02-24 04:29:08,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 162 transitions. [2022-02-24 04:29:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:29:08,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:08,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:08,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 04:29:08,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:08,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1535721358, now seen corresponding path program 1 times [2022-02-24 04:29:08,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:08,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659424674] [2022-02-24 04:29:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:08,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:08,961 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:09,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:09,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659424674] [2022-02-24 04:29:09,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [659424674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:09,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:09,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:09,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40792909] [2022-02-24 04:29:09,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:09,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:09,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:09,017 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) [2022-02-24 04:29:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:09,127 INFO L93 Difference]: Finished difference Result 136 states and 244 transitions. [2022-02-24 04:29:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 04:29:09,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:09,129 INFO L225 Difference]: With dead ends: 136 [2022-02-24 04:29:09,129 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 04:29:09,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:09,130 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 [2022-02-24 04:29:09,131 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] [2022-02-24 04:29:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 04:29:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-02-24 04:29:09,145 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) [2022-02-24 04:29:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 164 transitions. [2022-02-24 04:29:09,146 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 164 transitions. Word has length 25 [2022-02-24 04:29:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:09,147 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 164 transitions. [2022-02-24 04:29:09,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 164 transitions. [2022-02-24 04:29:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:29:09,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:09,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:09,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 04:29:09,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash -52626544, now seen corresponding path program 1 times [2022-02-24 04:29:09,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:09,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588689044] [2022-02-24 04:29:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:09,151 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:09,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:09,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588689044] [2022-02-24 04:29:09,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [588689044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:09,202 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:09,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:09,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009105289] [2022-02-24 04:29:09,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:09,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:09,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:09,204 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) [2022-02-24 04:29:09,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:09,311 INFO L93 Difference]: Finished difference Result 256 states and 468 transitions. [2022-02-24 04:29:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:09,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 04:29:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:09,313 INFO L225 Difference]: With dead ends: 256 [2022-02-24 04:29:09,313 INFO L226 Difference]: Without dead ends: 173 [2022-02-24 04:29:09,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:09,315 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 [2022-02-24 04:29:09,315 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] [2022-02-24 04:29:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-24 04:29:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-02-24 04:29:09,336 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) [2022-02-24 04:29:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 309 transitions. [2022-02-24 04:29:09,337 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 309 transitions. Word has length 25 [2022-02-24 04:29:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 309 transitions. [2022-02-24 04:29:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 309 transitions. [2022-02-24 04:29:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 04:29:09,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:09,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:09,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 04:29:09,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash 968441810, now seen corresponding path program 1 times [2022-02-24 04:29:09,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:09,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355439114] [2022-02-24 04:29:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:09,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:09,342 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:09,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:09,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355439114] [2022-02-24 04:29:09,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [355439114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:09,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:09,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:09,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177782404] [2022-02-24 04:29:09,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:09,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:09,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:09,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:09,392 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) [2022-02-24 04:29:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:09,505 INFO L93 Difference]: Finished difference Result 223 states and 403 transitions. [2022-02-24 04:29:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 04:29:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:09,507 INFO L225 Difference]: With dead ends: 223 [2022-02-24 04:29:09,507 INFO L226 Difference]: Without dead ends: 221 [2022-02-24 04:29:09,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:09,509 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 [2022-02-24 04:29:09,509 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] [2022-02-24 04:29:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-24 04:29:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2022-02-24 04:29:09,535 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) [2022-02-24 04:29:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 307 transitions. [2022-02-24 04:29:09,536 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 307 transitions. Word has length 25 [2022-02-24 04:29:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:09,537 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 307 transitions. [2022-02-24 04:29:09,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 307 transitions. [2022-02-24 04:29:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:29:09,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:09,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:09,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 04:29:09,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1631210112, now seen corresponding path program 1 times [2022-02-24 04:29:09,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:09,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846810085] [2022-02-24 04:29:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:09,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:09,541 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:09,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:09,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846810085] [2022-02-24 04:29:09,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [846810085] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:09,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:09,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:09,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490863430] [2022-02-24 04:29:09,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:09,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:09,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:09,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:09,585 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) [2022-02-24 04:29:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:09,705 INFO L93 Difference]: Finished difference Result 323 states and 587 transitions. [2022-02-24 04:29:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 04:29:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:09,708 INFO L225 Difference]: With dead ends: 323 [2022-02-24 04:29:09,708 INFO L226 Difference]: Without dead ends: 321 [2022-02-24 04:29:09,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:09,709 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 205 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:09,709 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] [2022-02-24 04:29:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-24 04:29:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 231. [2022-02-24 04:29:09,738 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) [2022-02-24 04:29:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 413 transitions. [2022-02-24 04:29:09,740 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 413 transitions. Word has length 26 [2022-02-24 04:29:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:09,740 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 413 transitions. [2022-02-24 04:29:09,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 413 transitions. [2022-02-24 04:29:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 04:29:09,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:09,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:09,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 04:29:09,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1642688830, now seen corresponding path program 1 times [2022-02-24 04:29:09,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:09,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739439966] [2022-02-24 04:29:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:09,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:09,745 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:09,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:09,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739439966] [2022-02-24 04:29:09,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739439966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:09,781 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:09,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:09,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056042592] [2022-02-24 04:29:09,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:09,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:09,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:09,783 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) [2022-02-24 04:29:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:09,927 INFO L93 Difference]: Finished difference Result 551 states and 995 transitions. [2022-02-24 04:29:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 04:29:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:09,929 INFO L225 Difference]: With dead ends: 551 [2022-02-24 04:29:09,930 INFO L226 Difference]: Without dead ends: 329 [2022-02-24 04:29:09,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:09,935 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:09,936 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] [2022-02-24 04:29:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-24 04:29:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-02-24 04:29:09,975 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) [2022-02-24 04:29:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 583 transitions. [2022-02-24 04:29:09,976 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 583 transitions. Word has length 26 [2022-02-24 04:29:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:09,977 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 583 transitions. [2022-02-24 04:29:09,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 583 transitions. [2022-02-24 04:29:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 04:29:09,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:09,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:09,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 04:29:09,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:09,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash 972307173, now seen corresponding path program 1 times [2022-02-24 04:29:09,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:09,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462388506] [2022-02-24 04:29:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:09,987 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:10,060 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:10,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462388506] [2022-02-24 04:29:10,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462388506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:10,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:10,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:10,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312955804] [2022-02-24 04:29:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:10,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:10,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:10,062 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) [2022-02-24 04:29:10,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:10,183 INFO L93 Difference]: Finished difference Result 493 states and 877 transitions. [2022-02-24 04:29:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:10,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 04:29:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:10,185 INFO L225 Difference]: With dead ends: 493 [2022-02-24 04:29:10,185 INFO L226 Difference]: Without dead ends: 335 [2022-02-24 04:29:10,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:10,187 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:10,187 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] [2022-02-24 04:29:10,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-24 04:29:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2022-02-24 04:29:10,223 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) [2022-02-24 04:29:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 587 transitions. [2022-02-24 04:29:10,224 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 587 transitions. Word has length 27 [2022-02-24 04:29:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:10,225 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 587 transitions. [2022-02-24 04:29:10,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 587 transitions. [2022-02-24 04:29:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 04:29:10,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:10,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:10,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 04:29:10,226 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:10,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash -616040729, now seen corresponding path program 1 times [2022-02-24 04:29:10,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:10,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052606672] [2022-02-24 04:29:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:10,228 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:10,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:10,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052606672] [2022-02-24 04:29:10,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052606672] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:10,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:10,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:10,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979399641] [2022-02-24 04:29:10,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:10,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:10,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:10,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:10,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:10,262 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) [2022-02-24 04:29:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:10,412 INFO L93 Difference]: Finished difference Result 621 states and 1109 transitions. [2022-02-24 04:29:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:10,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 04:29:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:10,417 INFO L225 Difference]: With dead ends: 621 [2022-02-24 04:29:10,418 INFO L226 Difference]: Without dead ends: 619 [2022-02-24 04:29:10,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:10,420 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:10,421 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] [2022-02-24 04:29:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-02-24 04:29:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 457. [2022-02-24 04:29:10,470 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) [2022-02-24 04:29:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 795 transitions. [2022-02-24 04:29:10,472 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 795 transitions. Word has length 27 [2022-02-24 04:29:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:10,473 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 795 transitions. [2022-02-24 04:29:10,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 795 transitions. [2022-02-24 04:29:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 04:29:10,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:10,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:10,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 04:29:10,477 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1637109083, now seen corresponding path program 1 times [2022-02-24 04:29:10,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:10,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546995857] [2022-02-24 04:29:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:10,482 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:10,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:10,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546995857] [2022-02-24 04:29:10,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546995857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:10,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:10,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:10,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968190396] [2022-02-24 04:29:10,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:10,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:10,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:10,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:10,547 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) [2022-02-24 04:29:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:10,705 INFO L93 Difference]: Finished difference Result 1085 states and 1901 transitions. [2022-02-24 04:29:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:10,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 04:29:10,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:10,709 INFO L225 Difference]: With dead ends: 1085 [2022-02-24 04:29:10,709 INFO L226 Difference]: Without dead ends: 643 [2022-02-24 04:29:10,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:10,711 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:10,712 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] [2022-02-24 04:29:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-24 04:29:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 641. [2022-02-24 04:29:10,775 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) [2022-02-24 04:29:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1111 transitions. [2022-02-24 04:29:10,778 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1111 transitions. Word has length 27 [2022-02-24 04:29:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:10,778 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1111 transitions. [2022-02-24 04:29:10,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1111 transitions. [2022-02-24 04:29:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:29:10,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:10,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:10,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 04:29:10,781 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:10,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1917179981, now seen corresponding path program 1 times [2022-02-24 04:29:10,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:10,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729632725] [2022-02-24 04:29:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:10,783 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:10,838 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:10,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729632725] [2022-02-24 04:29:10,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [729632725] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:10,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:10,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:10,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964237100] [2022-02-24 04:29:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:10,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:10,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:10,843 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) [2022-02-24 04:29:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:10,992 INFO L93 Difference]: Finished difference Result 961 states and 1661 transitions. [2022-02-24 04:29:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 04:29:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:10,996 INFO L225 Difference]: With dead ends: 961 [2022-02-24 04:29:10,997 INFO L226 Difference]: Without dead ends: 651 [2022-02-24 04:29:10,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:10,998 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:10,999 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] [2022-02-24 04:29:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-24 04:29:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2022-02-24 04:29:11,057 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) [2022-02-24 04:29:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1111 transitions. [2022-02-24 04:29:11,060 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1111 transitions. Word has length 28 [2022-02-24 04:29:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:11,060 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1111 transitions. [2022-02-24 04:29:11,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1111 transitions. [2022-02-24 04:29:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:29:11,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:11,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:11,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 04:29:11,062 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:11,062 INFO L85 PathProgramCache]: Analyzing trace with hash 789439413, now seen corresponding path program 1 times [2022-02-24 04:29:11,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:11,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753950487] [2022-02-24 04:29:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:11,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:11,066 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:11,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:11,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753950487] [2022-02-24 04:29:11,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753950487] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:11,108 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:11,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:11,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378567861] [2022-02-24 04:29:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:11,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:11,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:11,110 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) [2022-02-24 04:29:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:11,309 INFO L93 Difference]: Finished difference Result 1197 states and 2081 transitions. [2022-02-24 04:29:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 04:29:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:11,315 INFO L225 Difference]: With dead ends: 1197 [2022-02-24 04:29:11,315 INFO L226 Difference]: Without dead ends: 1195 [2022-02-24 04:29:11,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:11,316 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:11,317 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] [2022-02-24 04:29:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-24 04:29:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-02-24 04:29:11,406 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) [2022-02-24 04:29:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1519 transitions. [2022-02-24 04:29:11,410 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1519 transitions. Word has length 28 [2022-02-24 04:29:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:11,410 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1519 transitions. [2022-02-24 04:29:11,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1519 transitions. [2022-02-24 04:29:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 04:29:11,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:11,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:11,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 04:29:11,412 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:11,413 INFO L85 PathProgramCache]: Analyzing trace with hash -231628941, now seen corresponding path program 1 times [2022-02-24 04:29:11,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:11,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457246607] [2022-02-24 04:29:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:11,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:11,416 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:11,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:11,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457246607] [2022-02-24 04:29:11,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [457246607] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:11,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:11,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:11,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158805954] [2022-02-24 04:29:11,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:11,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:11,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:11,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:11,451 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) [2022-02-24 04:29:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:11,664 INFO L93 Difference]: Finished difference Result 2141 states and 3617 transitions. [2022-02-24 04:29:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 04:29:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:11,670 INFO L225 Difference]: With dead ends: 2141 [2022-02-24 04:29:11,670 INFO L226 Difference]: Without dead ends: 1259 [2022-02-24 04:29:11,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:11,672 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:11,672 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] [2022-02-24 04:29:11,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-02-24 04:29:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1257. [2022-02-24 04:29:11,765 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) [2022-02-24 04:29:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2103 transitions. [2022-02-24 04:29:11,770 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2103 transitions. Word has length 28 [2022-02-24 04:29:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:11,770 INFO L470 AbstractCegarLoop]: Abstraction has 1257 states and 2103 transitions. [2022-02-24 04:29:11,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2103 transitions. [2022-02-24 04:29:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:29:11,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:11,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:11,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 04:29:11,772 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1296968198, now seen corresponding path program 1 times [2022-02-24 04:29:11,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:11,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147021769] [2022-02-24 04:29:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:11,774 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:11,799 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:11,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147021769] [2022-02-24 04:29:11,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [147021769] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:11,799 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:11,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:11,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825070062] [2022-02-24 04:29:11,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:11,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:11,800 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) [2022-02-24 04:29:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,018 INFO L93 Difference]: Finished difference Result 1885 states and 3145 transitions. [2022-02-24 04:29:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 04:29:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,024 INFO L225 Difference]: With dead ends: 1885 [2022-02-24 04:29:12,024 INFO L226 Difference]: Without dead ends: 1275 [2022-02-24 04:29:12,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,026 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:12,027 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] [2022-02-24 04:29:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-02-24 04:29:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-02-24 04:29:12,130 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) [2022-02-24 04:29:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2103 transitions. [2022-02-24 04:29:12,135 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2103 transitions. Word has length 29 [2022-02-24 04:29:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,135 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 2103 transitions. [2022-02-24 04:29:12,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2103 transitions. [2022-02-24 04:29:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:29:12,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:12,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 04:29:12,137 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1409651196, now seen corresponding path program 1 times [2022-02-24 04:29:12,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349822608] [2022-02-24 04:29:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,139 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,165 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349822608] [2022-02-24 04:29:12,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [349822608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,166 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331766098] [2022-02-24 04:29:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,167 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) [2022-02-24 04:29:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,434 INFO L93 Difference]: Finished difference Result 2317 states and 3897 transitions. [2022-02-24 04:29:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 04:29:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,444 INFO L225 Difference]: With dead ends: 2317 [2022-02-24 04:29:12,444 INFO L226 Difference]: Without dead ends: 2315 [2022-02-24 04:29:12,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,446 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 [2022-02-24 04:29:12,446 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] [2022-02-24 04:29:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-24 04:29:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1801. [2022-02-24 04:29:12,619 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) [2022-02-24 04:29:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2903 transitions. [2022-02-24 04:29:12,625 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2903 transitions. Word has length 29 [2022-02-24 04:29:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:12,625 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 2903 transitions. [2022-02-24 04:29:12,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2903 transitions. [2022-02-24 04:29:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 04:29:12,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:12,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:12,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 04:29:12,628 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 388582842, now seen corresponding path program 1 times [2022-02-24 04:29:12,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:12,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751267625] [2022-02-24 04:29:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:12,629 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:12,666 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:12,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751267625] [2022-02-24 04:29:12,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [751267625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:12,666 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:12,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:12,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727825080] [2022-02-24 04:29:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:12,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:12,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:12,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:12,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:12,667 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) [2022-02-24 04:29:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:12,974 INFO L93 Difference]: Finished difference Result 4237 states and 6873 transitions. [2022-02-24 04:29:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:12,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 04:29:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:12,983 INFO L225 Difference]: With dead ends: 4237 [2022-02-24 04:29:12,984 INFO L226 Difference]: Without dead ends: 2475 [2022-02-24 04:29:12,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:12,988 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:12,988 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] [2022-02-24 04:29:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-24 04:29:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2022-02-24 04:29:13,218 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) [2022-02-24 04:29:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3975 transitions. [2022-02-24 04:29:13,225 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3975 transitions. Word has length 29 [2022-02-24 04:29:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:13,226 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 3975 transitions. [2022-02-24 04:29:13,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3975 transitions. [2022-02-24 04:29:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:29:13,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:13,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:13,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 04:29:13,229 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash 749728232, now seen corresponding path program 1 times [2022-02-24 04:29:13,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:13,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029585818] [2022-02-24 04:29:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:13,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:13,231 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:13,269 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:13,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029585818] [2022-02-24 04:29:13,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029585818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:13,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:13,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:13,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028434632] [2022-02-24 04:29:13,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:13,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:13,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:13,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:13,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:13,270 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) [2022-02-24 04:29:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:13,585 INFO L93 Difference]: Finished difference Result 3709 states and 5945 transitions. [2022-02-24 04:29:13,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:13,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 04:29:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:13,595 INFO L225 Difference]: With dead ends: 3709 [2022-02-24 04:29:13,595 INFO L226 Difference]: Without dead ends: 2507 [2022-02-24 04:29:13,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:13,599 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:13,599 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] [2022-02-24 04:29:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-02-24 04:29:13,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2505. [2022-02-24 04:29:13,813 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) [2022-02-24 04:29:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3975 transitions. [2022-02-24 04:29:13,821 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3975 transitions. Word has length 30 [2022-02-24 04:29:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:13,821 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 3975 transitions. [2022-02-24 04:29:13,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3975 transitions. [2022-02-24 04:29:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:29:13,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:13,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:13,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 04:29:13,825 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash -838619670, now seen corresponding path program 1 times [2022-02-24 04:29:13,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:13,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769646546] [2022-02-24 04:29:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:13,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:13,827 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:13,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:13,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769646546] [2022-02-24 04:29:13,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [769646546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:13,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:13,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:13,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40433082] [2022-02-24 04:29:13,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:13,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:13,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:13,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:13,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:13,851 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) [2022-02-24 04:29:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:14,310 INFO L93 Difference]: Finished difference Result 4493 states and 7273 transitions. [2022-02-24 04:29:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 04:29:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:14,326 INFO L225 Difference]: With dead ends: 4493 [2022-02-24 04:29:14,326 INFO L226 Difference]: Without dead ends: 4491 [2022-02-24 04:29:14,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:14,329 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:14,329 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] [2022-02-24 04:29:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-02-24 04:29:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3593. [2022-02-24 04:29:14,678 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) [2022-02-24 04:29:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5543 transitions. [2022-02-24 04:29:14,687 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5543 transitions. Word has length 30 [2022-02-24 04:29:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:14,687 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 5543 transitions. [2022-02-24 04:29:14,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5543 transitions. [2022-02-24 04:29:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 04:29:14,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:14,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:14,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 04:29:14,693 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:14,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:14,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1859688024, now seen corresponding path program 1 times [2022-02-24 04:29:14,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:14,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107609271] [2022-02-24 04:29:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:14,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:14,695 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:14,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:14,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107609271] [2022-02-24 04:29:14,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [107609271] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:14,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:14,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:14,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996823670] [2022-02-24 04:29:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:14,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:14,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:14,725 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) [2022-02-24 04:29:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:15,270 INFO L93 Difference]: Finished difference Result 8397 states and 13033 transitions. [2022-02-24 04:29:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 04:29:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:15,288 INFO L225 Difference]: With dead ends: 8397 [2022-02-24 04:29:15,288 INFO L226 Difference]: Without dead ends: 4875 [2022-02-24 04:29:15,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:15,298 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:15,298 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] [2022-02-24 04:29:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-02-24 04:29:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4873. [2022-02-24 04:29:15,796 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) [2022-02-24 04:29:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7495 transitions. [2022-02-24 04:29:15,807 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7495 transitions. Word has length 30 [2022-02-24 04:29:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:15,807 INFO L470 AbstractCegarLoop]: Abstraction has 4873 states and 7495 transitions. [2022-02-24 04:29:15,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7495 transitions. [2022-02-24 04:29:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:29:15,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:15,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:15,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 04:29:15,813 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash -227191537, now seen corresponding path program 1 times [2022-02-24 04:29:15,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:15,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805404006] [2022-02-24 04:29:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:15,815 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:15,838 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:15,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805404006] [2022-02-24 04:29:15,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1805404006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:15,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:15,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:15,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082212790] [2022-02-24 04:29:15,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:15,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:15,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:15,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:15,840 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) [2022-02-24 04:29:16,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:16,326 INFO L93 Difference]: Finished difference Result 7309 states and 11209 transitions. [2022-02-24 04:29:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 04:29:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:16,339 INFO L225 Difference]: With dead ends: 7309 [2022-02-24 04:29:16,340 INFO L226 Difference]: Without dead ends: 4939 [2022-02-24 04:29:16,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:16,347 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 164 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:16,347 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] [2022-02-24 04:29:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2022-02-24 04:29:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4937. [2022-02-24 04:29:16,937 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) [2022-02-24 04:29:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 7495 transitions. [2022-02-24 04:29:16,953 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 7495 transitions. Word has length 31 [2022-02-24 04:29:16,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:16,953 INFO L470 AbstractCegarLoop]: Abstraction has 4937 states and 7495 transitions. [2022-02-24 04:29:16,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:16,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 7495 transitions. [2022-02-24 04:29:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:29:16,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:16,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:16,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 04:29:16,959 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1815539439, now seen corresponding path program 1 times [2022-02-24 04:29:16,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:16,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795340569] [2022-02-24 04:29:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:16,962 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:16,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:16,992 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:16,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795340569] [2022-02-24 04:29:16,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795340569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:16,992 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:16,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:16,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957694130] [2022-02-24 04:29:16,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:16,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:16,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:16,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:16,994 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) [2022-02-24 04:29:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:17,717 INFO L93 Difference]: Finished difference Result 8717 states and 13513 transitions. [2022-02-24 04:29:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:17,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 04:29:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:17,736 INFO L225 Difference]: With dead ends: 8717 [2022-02-24 04:29:17,736 INFO L226 Difference]: Without dead ends: 8715 [2022-02-24 04:29:17,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:17,739 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:17,739 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] [2022-02-24 04:29:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8715 states. [2022-02-24 04:29:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8715 to 7177. [2022-02-24 04:29:18,252 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) [2022-02-24 04:29:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10567 transitions. [2022-02-24 04:29:18,267 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10567 transitions. Word has length 31 [2022-02-24 04:29:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:18,268 INFO L470 AbstractCegarLoop]: Abstraction has 7177 states and 10567 transitions. [2022-02-24 04:29:18,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10567 transitions. [2022-02-24 04:29:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 04:29:18,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:18,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:18,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 04:29:18,279 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:18,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1458359503, now seen corresponding path program 1 times [2022-02-24 04:29:18,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:18,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002240602] [2022-02-24 04:29:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:18,282 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:18,316 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:18,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002240602] [2022-02-24 04:29:18,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1002240602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:18,316 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:18,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:18,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618603601] [2022-02-24 04:29:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:18,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:18,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:18,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:18,317 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) [2022-02-24 04:29:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:19,082 INFO L93 Difference]: Finished difference Result 16653 states and 24649 transitions. [2022-02-24 04:29:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 04:29:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:19,104 INFO L225 Difference]: With dead ends: 16653 [2022-02-24 04:29:19,104 INFO L226 Difference]: Without dead ends: 9611 [2022-02-24 04:29:19,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:19,122 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:19,122 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] [2022-02-24 04:29:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2022-02-24 04:29:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9609. [2022-02-24 04:29:20,081 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) [2022-02-24 04:29:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 14087 transitions. [2022-02-24 04:29:20,101 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 14087 transitions. Word has length 31 [2022-02-24 04:29:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:20,101 INFO L470 AbstractCegarLoop]: Abstraction has 9609 states and 14087 transitions. [2022-02-24 04:29:20,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 14087 transitions. [2022-02-24 04:29:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:29:20,110 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:20,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:20,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 04:29:20,111 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash -446932963, now seen corresponding path program 1 times [2022-02-24 04:29:20,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:20,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644779561] [2022-02-24 04:29:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:20,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:20,113 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:20,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:20,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644779561] [2022-02-24 04:29:20,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644779561] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:20,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:20,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:20,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838448797] [2022-02-24 04:29:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:20,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:20,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:20,134 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) [2022-02-24 04:29:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:21,009 INFO L93 Difference]: Finished difference Result 14413 states and 21065 transitions. [2022-02-24 04:29:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:29:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:21,033 INFO L225 Difference]: With dead ends: 14413 [2022-02-24 04:29:21,033 INFO L226 Difference]: Without dead ends: 9739 [2022-02-24 04:29:21,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:21,048 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:21,048 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] [2022-02-24 04:29:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2022-02-24 04:29:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9737. [2022-02-24 04:29:21,894 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) [2022-02-24 04:29:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 14087 transitions. [2022-02-24 04:29:21,914 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 14087 transitions. Word has length 32 [2022-02-24 04:29:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:21,914 INFO L470 AbstractCegarLoop]: Abstraction has 9737 states and 14087 transitions. [2022-02-24 04:29:21,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 14087 transitions. [2022-02-24 04:29:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:29:21,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:21,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:21,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 04:29:21,923 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2035280865, now seen corresponding path program 1 times [2022-02-24 04:29:21,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:21,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099407486] [2022-02-24 04:29:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:21,927 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:21,955 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:21,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099407486] [2022-02-24 04:29:21,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099407486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:21,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:21,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:21,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194362577] [2022-02-24 04:29:21,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:21,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:21,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:21,956 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) [2022-02-24 04:29:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:23,354 INFO L93 Difference]: Finished difference Result 16909 states and 24969 transitions. [2022-02-24 04:29:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:23,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:29:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:23,385 INFO L225 Difference]: With dead ends: 16909 [2022-02-24 04:29:23,385 INFO L226 Difference]: Without dead ends: 16907 [2022-02-24 04:29:23,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:23,396 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:23,397 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] [2022-02-24 04:29:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16907 states. [2022-02-24 04:29:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16907 to 14345. [2022-02-24 04:29:25,080 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) [2022-02-24 04:29:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 20103 transitions. [2022-02-24 04:29:25,105 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 20103 transitions. Word has length 32 [2022-02-24 04:29:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:25,105 INFO L470 AbstractCegarLoop]: Abstraction has 14345 states and 20103 transitions. [2022-02-24 04:29:25,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 20103 transitions. [2022-02-24 04:29:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 04:29:25,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:25,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:25,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 04:29:25,123 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:25,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1238618077, now seen corresponding path program 1 times [2022-02-24 04:29:25,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:25,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749652508] [2022-02-24 04:29:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:25,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:25,125 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:25,148 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:25,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749652508] [2022-02-24 04:29:25,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749652508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:25,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:25,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:25,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160100118] [2022-02-24 04:29:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:25,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:25,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:25,149 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) [2022-02-24 04:29:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:26,675 INFO L93 Difference]: Finished difference Result 33037 states and 46473 transitions. [2022-02-24 04:29:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:26,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 04:29:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:26,707 INFO L225 Difference]: With dead ends: 33037 [2022-02-24 04:29:26,707 INFO L226 Difference]: Without dead ends: 18955 [2022-02-24 04:29:26,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:26,744 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:26,745 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] [2022-02-24 04:29:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18955 states. [2022-02-24 04:29:28,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18955 to 18953. [2022-02-24 04:29:28,432 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) [2022-02-24 04:29:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 26375 transitions. [2022-02-24 04:29:28,468 INFO L78 Accepts]: Start accepts. Automaton has 18953 states and 26375 transitions. Word has length 32 [2022-02-24 04:29:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:28,469 INFO L470 AbstractCegarLoop]: Abstraction has 18953 states and 26375 transitions. [2022-02-24 04:29:28,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 18953 states and 26375 transitions. [2022-02-24 04:29:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:29:28,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:28,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:28,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 04:29:28,483 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1331017764, now seen corresponding path program 1 times [2022-02-24 04:29:28,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:28,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932361095] [2022-02-24 04:29:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:28,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:28,486 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:28,523 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:28,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932361095] [2022-02-24 04:29:28,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932361095] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:28,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:28,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:28,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302464957] [2022-02-24 04:29:28,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:28,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:28,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:28,525 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) [2022-02-24 04:29:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:30,081 INFO L93 Difference]: Finished difference Result 28429 states and 39433 transitions. [2022-02-24 04:29:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 04:29:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:30,112 INFO L225 Difference]: With dead ends: 28429 [2022-02-24 04:29:30,113 INFO L226 Difference]: Without dead ends: 19211 [2022-02-24 04:29:30,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:30,137 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:30,137 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] [2022-02-24 04:29:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19211 states. [2022-02-24 04:29:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19211 to 19209. [2022-02-24 04:29:31,879 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) [2022-02-24 04:29:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19209 states to 19209 states and 26375 transitions. [2022-02-24 04:29:31,922 INFO L78 Accepts]: Start accepts. Automaton has 19209 states and 26375 transitions. Word has length 33 [2022-02-24 04:29:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:31,922 INFO L470 AbstractCegarLoop]: Abstraction has 19209 states and 26375 transitions. [2022-02-24 04:29:31,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 19209 states and 26375 transitions. [2022-02-24 04:29:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:29:31,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:31,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:31,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 04:29:31,938 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash -257330138, now seen corresponding path program 1 times [2022-02-24 04:29:31,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:31,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679518740] [2022-02-24 04:29:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:31,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:31,940 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:31,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:31,964 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:31,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679518740] [2022-02-24 04:29:31,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1679518740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:31,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:31,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:31,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678536327] [2022-02-24 04:29:31,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:31,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:31,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:31,965 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) [2022-02-24 04:29:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:35,038 INFO L93 Difference]: Finished difference Result 56077 states and 76041 transitions. [2022-02-24 04:29:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 04:29:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:35,102 INFO L225 Difference]: With dead ends: 56077 [2022-02-24 04:29:35,102 INFO L226 Difference]: Without dead ends: 37387 [2022-02-24 04:29:35,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:35,140 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:35,140 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] [2022-02-24 04:29:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-02-24 04:29:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 37385. [2022-02-24 04:29:38,416 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) [2022-02-24 04:29:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49671 transitions. [2022-02-24 04:29:38,473 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49671 transitions. Word has length 33 [2022-02-24 04:29:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:38,473 INFO L470 AbstractCegarLoop]: Abstraction has 37385 states and 49671 transitions. [2022-02-24 04:29:38,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49671 transitions. [2022-02-24 04:29:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 04:29:38,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:38,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:38,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 04:29:38,495 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash 763738216, now seen corresponding path program 1 times [2022-02-24 04:29:38,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:38,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548526084] [2022-02-24 04:29:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:38,497 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:38,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:38,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:38,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548526084] [2022-02-24 04:29:38,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548526084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:38,517 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:38,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:38,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648428046] [2022-02-24 04:29:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:38,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:38,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:38,518 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) [2022-02-24 04:29:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:42,052 INFO L93 Difference]: Finished difference Result 41485 states and 56841 transitions. [2022-02-24 04:29:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 04:29:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:42,129 INFO L225 Difference]: With dead ends: 41485 [2022-02-24 04:29:42,130 INFO L226 Difference]: Without dead ends: 41483 [2022-02-24 04:29:42,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:42,143 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 107 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:29:42,143 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] [2022-02-24 04:29:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41483 states. [2022-02-24 04:29:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41483 to 37385. [2022-02-24 04:29:45,332 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) [2022-02-24 04:29:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49159 transitions. [2022-02-24 04:29:45,386 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49159 transitions. Word has length 33 [2022-02-24 04:29:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:45,386 INFO L470 AbstractCegarLoop]: Abstraction has 37385 states and 49159 transitions. [2022-02-24 04:29:45,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49159 transitions. [2022-02-24 04:29:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:29:45,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:45,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:45,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 04:29:45,406 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 612915794, now seen corresponding path program 1 times [2022-02-24 04:29:45,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:45,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392182535] [2022-02-24 04:29:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:45,407 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:45,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:45,439 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:45,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392182535] [2022-02-24 04:29:45,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [392182535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:45,439 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:45,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:45,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532778466] [2022-02-24 04:29:45,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:45,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:45,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:45,440 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) [2022-02-24 04:29:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:29:51,127 INFO L93 Difference]: Finished difference Result 62989 states and 83977 transitions. [2022-02-24 04:29:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:29:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 04:29:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:29:51,229 INFO L225 Difference]: With dead ends: 62989 [2022-02-24 04:29:51,229 INFO L226 Difference]: Without dead ends: 62987 [2022-02-24 04:29:51,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:29:51,250 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 [2022-02-24 04:29:51,250 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] [2022-02-24 04:29:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62987 states. [2022-02-24 04:29:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62987 to 56841. [2022-02-24 04:29:56,499 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) [2022-02-24 04:29:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56841 states to 56841 states and 72711 transitions. [2022-02-24 04:29:56,594 INFO L78 Accepts]: Start accepts. Automaton has 56841 states and 72711 transitions. Word has length 34 [2022-02-24 04:29:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:29:56,595 INFO L470 AbstractCegarLoop]: Abstraction has 56841 states and 72711 transitions. [2022-02-24 04:29:56,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:29:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 56841 states and 72711 transitions. [2022-02-24 04:29:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 04:29:56,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:29:56,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 04:29:56,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 04:29:56,641 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:29:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:29:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash -408152560, now seen corresponding path program 1 times [2022-02-24 04:29:56,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:29:56,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663872253] [2022-02-24 04:29:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:29:56,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:29:56,643 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:29:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:56,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:29:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:29:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:29:56,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:29:56,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663872253] [2022-02-24 04:29:56,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663872253] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:29:56,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:29:56,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:29:56,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253276823] [2022-02-24 04:29:56,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:29:56,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:29:56,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:29:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:29:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:29:56,664 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) [2022-02-24 04:30:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:30:03,156 INFO L93 Difference]: Finished difference Result 129549 states and 165897 transitions. [2022-02-24 04:30:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:30:03,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 04:30:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:30:03,463 INFO L225 Difference]: With dead ends: 129549 [2022-02-24 04:30:03,463 INFO L226 Difference]: Without dead ends: 73227 [2022-02-24 04:30:03,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:30:03,531 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 [2022-02-24 04:30:03,531 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] [2022-02-24 04:30:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73227 states. [2022-02-24 04:30:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73227 to 73225. [2022-02-24 04:30:10,352 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) [2022-02-24 04:30:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73225 states to 73225 states and 92167 transitions. [2022-02-24 04:30:10,531 INFO L78 Accepts]: Start accepts. Automaton has 73225 states and 92167 transitions. Word has length 34 [2022-02-24 04:30:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:30:10,531 INFO L470 AbstractCegarLoop]: Abstraction has 73225 states and 92167 transitions. [2022-02-24 04:30:10,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 04:30:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 73225 states and 92167 transitions. [2022-02-24 04:30:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 04:30:10,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:30:10,599 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] [2022-02-24 04:30:10,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 04:30:10,599 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:30:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:30:10,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1820736251, now seen corresponding path program 1 times [2022-02-24 04:30:10,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:30:10,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524474437] [2022-02-24 04:30:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:30:10,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:30:10,601 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:30:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:10,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:30:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:30:10,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:30:10,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524474437] [2022-02-24 04:30:10,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [524474437] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:30:10,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:30:10,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:30:10,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111436265] [2022-02-24 04:30:10,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:30:10,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:30:10,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:30:10,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:30:10,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:30:10,626 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) [2022-02-24 04:30:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:30:17,468 INFO L93 Difference]: Finished difference Result 110605 states and 139273 transitions. [2022-02-24 04:30:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:30:17,469 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 [2022-02-24 04:30:17,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:30:17,598 INFO L225 Difference]: With dead ends: 110605 [2022-02-24 04:30:17,598 INFO L226 Difference]: Without dead ends: 74763 [2022-02-24 04:30:17,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:30:17,647 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 [2022-02-24 04:30:17,647 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] [2022-02-24 04:30:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74763 states. [2022-02-24 04:30:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74763 to 74761. [2022-02-24 04:30:24,533 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) [2022-02-24 04:30:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74761 states to 74761 states and 93191 transitions. [2022-02-24 04:30:24,682 INFO L78 Accepts]: Start accepts. Automaton has 74761 states and 93191 transitions. Word has length 35 [2022-02-24 04:30:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:30:24,683 INFO L470 AbstractCegarLoop]: Abstraction has 74761 states and 93191 transitions. [2022-02-24 04:30:24,683 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) [2022-02-24 04:30:24,683 INFO L276 IsEmpty]: Start isEmpty. Operand 74761 states and 93191 transitions. [2022-02-24 04:30:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 04:30:24,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:30:24,724 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] [2022-02-24 04:30:24,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 04:30:24,724 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:30:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:30:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash 232388349, now seen corresponding path program 1 times [2022-02-24 04:30:24,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:30:24,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493287295] [2022-02-24 04:30:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:30:24,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:30:24,726 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:30:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:24,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:30:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:30:24,750 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:30:24,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493287295] [2022-02-24 04:30:24,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493287295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:30:24,750 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:30:24,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:30:24,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281048581] [2022-02-24 04:30:24,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:30:24,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:30:24,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:30:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:30:24,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:30:24,751 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) [2022-02-24 04:30:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:30:36,341 INFO L93 Difference]: Finished difference Result 122893 states and 153609 transitions. [2022-02-24 04:30:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:30:36,341 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 [2022-02-24 04:30:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:30:36,593 INFO L225 Difference]: With dead ends: 122893 [2022-02-24 04:30:36,593 INFO L226 Difference]: Without dead ends: 122891 [2022-02-24 04:30:36,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:30:36,637 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-24 04:30:36,637 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] [2022-02-24 04:30:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122891 states. [2022-02-24 04:30:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122891 to 114697. [2022-02-24 04:30:48,040 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) [2022-02-24 04:30:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114697 states to 114697 states and 139271 transitions. [2022-02-24 04:30:48,288 INFO L78 Accepts]: Start accepts. Automaton has 114697 states and 139271 transitions. Word has length 35 [2022-02-24 04:30:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 04:30:48,288 INFO L470 AbstractCegarLoop]: Abstraction has 114697 states and 139271 transitions. [2022-02-24 04:30:48,288 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) [2022-02-24 04:30:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 114697 states and 139271 transitions. [2022-02-24 04:30:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 04:30:48,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 04:30:48,396 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] [2022-02-24 04:30:48,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 04:30:48,396 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 04:30:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 04:30:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash -788680005, now seen corresponding path program 1 times [2022-02-24 04:30:48,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 04:30:48,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19535359] [2022-02-24 04:30:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 04:30:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 04:30:48,398 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 04:30:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:48,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 04:30:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 04:30:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 04:30:48,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 04:30:48,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19535359] [2022-02-24 04:30:48,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [19535359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 04:30:48,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 04:30:48,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 04:30:48,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855000627] [2022-02-24 04:30:48,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 04:30:48,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 04:30:48,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 04:30:48,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 04:30:48,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 04:30:48,421 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) [2022-02-24 04:31:02,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 04:31:02,818 INFO L93 Difference]: Finished difference Result 258061 states and 311305 transitions. [2022-02-24 04:31:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 04:31:02,819 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 [2022-02-24 04:31:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 04:31:03,360 INFO L225 Difference]: With dead ends: 258061 [2022-02-24 04:31:03,361 INFO L226 Difference]: Without dead ends: 145419 [2022-02-24 04:31:03,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 04:31:03,499 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 [2022-02-24 04:31:03,500 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] [2022-02-24 04:31:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145419 states.