/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/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:36:48,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:36:48,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:36:48,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:36:48,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:36:48,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:36:48,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:36:48,464 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 03:36:48,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:36:48,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:36:48,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:36:48,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:36:48,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:36:48,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:36:48,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:36:48,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:36:48,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:36:48,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:36:48,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:36:48,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:36:48,475 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:36:48,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:36:48,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:36:48,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:36:48,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:36:48,694 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:36:48,696 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:36:48,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-02-24 03:36:48,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78ab3e6c/d89b084a786d484a8cdace50783353d0/FLAG97dba3f86 [2022-02-24 03:36:49,103 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:36:49,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-02-24 03:36:49,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78ab3e6c/d89b084a786d484a8cdace50783353d0/FLAG97dba3f86 [2022-02-24 03:36:49,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b78ab3e6c/d89b084a786d484a8cdace50783353d0 [2022-02-24 03:36:49,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:36:49,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:36:49,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:36:49,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:36:49,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:36:49,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c33818c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49, skipping insertion in model container [2022-02-24 03:36:49,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:36:49,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:36:49,284 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-02-24 03:36:49,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:36:49,303 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:36:49,311 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c[368,381] [2022-02-24 03:36:49,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:36:49,322 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:36:49,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49 WrapperNode [2022-02-24 03:36:49,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:36:49,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:36:49,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:36:49,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:36:49,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:36:49,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:36:49,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:36:49,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:36:49,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (1/1) ... [2022-02-24 03:36:49,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:36:49,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:36:49,366 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 03:36:49,368 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 03:36:49,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:36:49,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:36:49,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:36:49,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:36:49,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:36:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:36:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:36:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:36:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:36:49,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:36:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:36:49,446 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:36:49,447 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:36:49,552 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:36:49,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:36:49,556 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-02-24 03:36:49,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:36:49 BoogieIcfgContainer [2022-02-24 03:36:49,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:36:49,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:36:49,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:36:49,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:36:49,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:36:49" (1/3) ... [2022-02-24 03:36:49,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a05dfa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:36:49, skipping insertion in model container [2022-02-24 03:36:49,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:36:49" (2/3) ... [2022-02-24 03:36:49,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a05dfa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:36:49, skipping insertion in model container [2022-02-24 03:36:49,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:36:49" (3/3) ... [2022-02-24 03:36:49,584 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-02-24 03:36:49,590 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:36:49,590 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:36:49,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:36:49,633 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 03:36:49,633 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:36:49,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 03:36:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 03:36:49,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:49,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:49,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:49,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1060076674, now seen corresponding path program 1 times [2022-02-24 03:36:49,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:49,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502463012] [2022-02-24 03:36:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:49,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:49,700 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:36:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:49,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:49,807 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 03:36:49,808 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:49,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502463012] [2022-02-24 03:36:49,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502463012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:49,809 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:49,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:36:49,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321558223] [2022-02-24 03:36:49,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:49,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:36:49,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:36:49,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:36:49,838 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:49,887 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-02-24 03:36:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:36:49,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 03:36:49,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:49,894 INFO L225 Difference]: With dead ends: 41 [2022-02-24 03:36:49,894 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 03:36:49,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:36:49,902 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:49,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:36:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 03:36:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-24 03:36:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-02-24 03:36:49,934 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-02-24 03:36:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:49,935 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-02-24 03:36:49,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-02-24 03:36:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 03:36:49,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:49,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:49,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:36:49,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593278, now seen corresponding path program 1 times [2022-02-24 03:36:49,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:49,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744621446] [2022-02-24 03:36:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:49,947 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:36:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:50,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:50,076 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 03:36:50,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:50,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744621446] [2022-02-24 03:36:50,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744621446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:50,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:50,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:36:50,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419720915] [2022-02-24 03:36:50,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:50,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:36:50,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:36:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:36:50,079 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:50,188 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-02-24 03:36:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:36:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 03:36:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:50,190 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:36:50,190 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 03:36:50,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:36:50,194 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:50,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 03:36:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-24 03:36:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-02-24 03:36:50,208 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 16 [2022-02-24 03:36:50,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:50,209 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-02-24 03:36:50,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-02-24 03:36:50,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:36:50,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:50,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:50,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:36:50,211 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2018158143, now seen corresponding path program 1 times [2022-02-24 03:36:50,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:50,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457829614] [2022-02-24 03:36:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:50,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:50,676 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:50,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:50,813 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 03:36:50,904 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:50,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457829614] [2022-02-24 03:36:50,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [457829614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:50,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:50,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:36:50,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747769397] [2022-02-24 03:36:50,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:50,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:36:50,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:50,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:36:50,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:36:50,908 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:51,025 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-02-24 03:36:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:36:51,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:36:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:51,026 INFO L225 Difference]: With dead ends: 36 [2022-02-24 03:36:51,026 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 03:36:51,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:36:51,027 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:51,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 03:36:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-24 03:36:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-02-24 03:36:51,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2022-02-24 03:36:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:51,031 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-02-24 03:36:51,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-02-24 03:36:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:36:51,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:51,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:51,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:36:51,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash -615329744, now seen corresponding path program 1 times [2022-02-24 03:36:51,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:51,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341665569] [2022-02-24 03:36:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:51,153 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:51,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:36:51,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:51,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341665569] [2022-02-24 03:36:51,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [341665569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:51,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:51,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:36:51,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702475811] [2022-02-24 03:36:51,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:51,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:36:51,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:36:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:36:51,357 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:51,452 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-02-24 03:36:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:36:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:36:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:51,453 INFO L225 Difference]: With dead ends: 31 [2022-02-24 03:36:51,453 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:36:51,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:36:51,454 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:51,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 48 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-02-24 03:36:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:36:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:36:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-02-24 03:36:51,457 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 17 [2022-02-24 03:36:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:51,458 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-02-24 03:36:51,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-02-24 03:36:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 03:36:51,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:51,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:51,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:36:51,459 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash -809859500, now seen corresponding path program 1 times [2022-02-24 03:36:51,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:51,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499490629] [2022-02-24 03:36:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:51,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:52,042 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,077 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 03:36:52,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:52,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499490629] [2022-02-24 03:36:52,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499490629] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:52,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:52,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:36:52,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303647306] [2022-02-24 03:36:52,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:52,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:36:52,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:36:52,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:36:52,093 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:52,165 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-02-24 03:36:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:36:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 03:36:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:52,166 INFO L225 Difference]: With dead ends: 36 [2022-02-24 03:36:52,166 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 03:36:52,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:36:52,167 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:52,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 27 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:36:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 03:36:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-02-24 03:36:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-02-24 03:36:52,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 18 [2022-02-24 03:36:52,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:52,173 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-02-24 03:36:52,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,173 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-02-24 03:36:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 03:36:52,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:52,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:52,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:36:52,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:52,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash 592968899, now seen corresponding path program 1 times [2022-02-24 03:36:52,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:52,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139080257] [2022-02-24 03:36:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:52,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:52,337 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,378 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 03:36:52,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:52,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139080257] [2022-02-24 03:36:52,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [139080257] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:52,396 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:52,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:36:52,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156228841] [2022-02-24 03:36:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:52,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:36:52,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:36:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:36:52,411 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:52,478 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2022-02-24 03:36:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 03:36:52,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 03:36:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:52,480 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:36:52,480 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 03:36:52,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:36:52,482 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:52,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:36:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 03:36:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-02-24 03:36:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-02-24 03:36:52,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-02-24 03:36:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:52,495 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-02-24 03:36:52,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-02-24 03:36:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:36:52,496 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:52,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:52,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:36:52,497 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash 735022287, now seen corresponding path program 1 times [2022-02-24 03:36:52,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:52,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015559701] [2022-02-24 03:36:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:52,638 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,682 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 03:36:52,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:52,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015559701] [2022-02-24 03:36:52,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015559701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:52,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:52,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:36:52,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779395056] [2022-02-24 03:36:52,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:52,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:36:52,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:52,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:36:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:36:52,693 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:52,774 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-02-24 03:36:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:36:52,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:36:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:52,774 INFO L225 Difference]: With dead ends: 35 [2022-02-24 03:36:52,774 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 03:36:52,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:36:52,776 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:52,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:36:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 03:36:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 03:36:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-02-24 03:36:52,781 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 19 [2022-02-24 03:36:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:52,782 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-02-24 03:36:52,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-02-24 03:36:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:36:52,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:52,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:52,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:36:52,783 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:52,783 INFO L85 PathProgramCache]: Analyzing trace with hash -528072081, now seen corresponding path program 1 times [2022-02-24 03:36:52,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:52,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193532771] [2022-02-24 03:36:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:52,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:52,934 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:52,978 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 03:36:52,988 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:52,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193532771] [2022-02-24 03:36:52,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193532771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:52,988 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:52,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:36:52,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329246828] [2022-02-24 03:36:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:52,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:36:52,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:36:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:36:52,989 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:53,055 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-02-24 03:36:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:36:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:36:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:53,057 INFO L225 Difference]: With dead ends: 30 [2022-02-24 03:36:53,061 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 03:36:53,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:36:53,061 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:53,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:36:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 03:36:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-24 03:36:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-02-24 03:36:53,068 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2022-02-24 03:36:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:53,068 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-02-24 03:36:53,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-02-24 03:36:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:36:53,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:53,069 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] [2022-02-24 03:36:53,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:36:53,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 342490275, now seen corresponding path program 1 times [2022-02-24 03:36:53,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:53,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213725804] [2022-02-24 03:36:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:53,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:53,214 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:53,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:53,293 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 03:36:53,332 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:53,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213725804] [2022-02-24 03:36:53,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1213725804] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:53,332 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:53,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:36:53,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854847380] [2022-02-24 03:36:53,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:53,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:36:53,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:36:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:36:53,333 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:53,462 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-02-24 03:36:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:36:53,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 03:36:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:53,463 INFO L225 Difference]: With dead ends: 33 [2022-02-24 03:36:53,463 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 03:36:53,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:36:53,463 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:53,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 03:36:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 03:36:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-02-24 03:36:53,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 20 [2022-02-24 03:36:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:53,468 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-02-24 03:36:53,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-02-24 03:36:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:36:53,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:53,469 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] [2022-02-24 03:36:53,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:36:53,469 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1745318674, now seen corresponding path program 1 times [2022-02-24 03:36:53,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:53,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250010066] [2022-02-24 03:36:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:53,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:53,610 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:53,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:53,666 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 03:36:53,679 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:53,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250010066] [2022-02-24 03:36:53,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [250010066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:53,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:53,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:36:53,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958544412] [2022-02-24 03:36:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:53,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:36:53,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:36:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:36:53,680 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:53,787 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-02-24 03:36:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:36:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 03:36:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:53,789 INFO L225 Difference]: With dead ends: 39 [2022-02-24 03:36:53,789 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 03:36:53,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:36:53,790 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:53,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 31 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 03:36:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-02-24 03:36:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-02-24 03:36:53,797 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 20 [2022-02-24 03:36:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:53,797 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-02-24 03:36:53,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-02-24 03:36:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 03:36:53,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:53,797 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] [2022-02-24 03:36:53,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:36:53,798 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:53,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1695200847, now seen corresponding path program 1 times [2022-02-24 03:36:53,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:53,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325596966] [2022-02-24 03:36:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:53,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:53,910 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:53,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:54,001 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 03:36:54,014 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:54,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325596966] [2022-02-24 03:36:54,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1325596966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:54,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:54,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:36:54,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156438372] [2022-02-24 03:36:54,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:54,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:36:54,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:54,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:36:54,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:36:54,017 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:54,234 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2022-02-24 03:36:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:36:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 03:36:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:54,236 INFO L225 Difference]: With dead ends: 59 [2022-02-24 03:36:54,236 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:36:54,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:36:54,237 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:54,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 50 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:36:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-02-24 03:36:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2022-02-24 03:36:54,245 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 21 [2022-02-24 03:36:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:54,246 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2022-02-24 03:36:54,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2022-02-24 03:36:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:36:54,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:54,246 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:54,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:36:54,246 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:54,247 INFO L85 PathProgramCache]: Analyzing trace with hash -977123598, now seen corresponding path program 2 times [2022-02-24 03:36:54,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:54,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779942386] [2022-02-24 03:36:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:54,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:54,335 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:54,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:54,369 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 03:36:54,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:54,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779942386] [2022-02-24 03:36:54,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [779942386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:54,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:54,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:36:54,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60982900] [2022-02-24 03:36:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:54,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:36:54,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:36:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:36:54,380 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:54,470 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-02-24 03:36:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:36:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 03:36:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:54,471 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:36:54,471 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 03:36:54,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:36:54,472 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:54,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:36:54,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 03:36:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-24 03:36:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-02-24 03:36:54,480 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 22 [2022-02-24 03:36:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:54,480 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-02-24 03:36:54,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-02-24 03:36:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:36:54,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:54,481 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:54,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:36:54,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:54,481 INFO L85 PathProgramCache]: Analyzing trace with hash -439116189, now seen corresponding path program 3 times [2022-02-24 03:36:54,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:54,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746901180] [2022-02-24 03:36:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:54,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:54,603 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:54,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:54,649 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 03:36:54,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:54,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746901180] [2022-02-24 03:36:54,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746901180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:54,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:54,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:36:54,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858275789] [2022-02-24 03:36:54,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:54,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:36:54,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:54,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:36:54,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:36:54,662 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:54,735 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-02-24 03:36:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:36:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 03:36:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:54,735 INFO L225 Difference]: With dead ends: 53 [2022-02-24 03:36:54,736 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 03:36:54,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:36:54,736 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:54,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:36:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 03:36:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-02-24 03:36:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-24 03:36:54,747 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 22 [2022-02-24 03:36:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:54,747 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-24 03:36:54,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-24 03:36:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:36:54,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:54,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:54,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:36:54,749 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1891906146, now seen corresponding path program 2 times [2022-02-24 03:36:54,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:54,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778174106] [2022-02-24 03:36:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:54,867 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:54,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:54,913 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 03:36:54,939 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:54,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778174106] [2022-02-24 03:36:54,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [778174106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:54,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:54,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:36:54,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681762525] [2022-02-24 03:36:54,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:54,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:36:54,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:54,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:36:54,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:36:54,940 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:55,139 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-02-24 03:36:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:36:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 03:36:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:55,140 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:36:55,140 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:36:55,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:36:55,141 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:55,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 43 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:36:55,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-02-24 03:36:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-02-24 03:36:55,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 22 [2022-02-24 03:36:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:55,146 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-02-24 03:36:55,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-02-24 03:36:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:36:55,147 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:55,147 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:55,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:36:55,147 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1409588607, now seen corresponding path program 3 times [2022-02-24 03:36:55,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:55,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278500287] [2022-02-24 03:36:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:55,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:55,299 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:55,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:55,360 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 03:36:55,385 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:55,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278500287] [2022-02-24 03:36:55,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278500287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:55,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:55,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:36:55,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867697828] [2022-02-24 03:36:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:55,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:36:55,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:36:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:36:55,386 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:55,548 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2022-02-24 03:36:55,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:36:55,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 03:36:55,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:55,548 INFO L225 Difference]: With dead ends: 50 [2022-02-24 03:36:55,548 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 03:36:55,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:36:55,549 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:55,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 03:36:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-02-24 03:36:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-02-24 03:36:55,557 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 23 [2022-02-24 03:36:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:55,557 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-02-24 03:36:55,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-02-24 03:36:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:36:55,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:55,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:55,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:36:55,558 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash -6760208, now seen corresponding path program 2 times [2022-02-24 03:36:55,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:55,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055596027] [2022-02-24 03:36:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:55,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:55,652 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:55,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:55,821 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 03:36:55,910 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:55,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055596027] [2022-02-24 03:36:55,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2055596027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:55,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:55,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:36:55,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203854592] [2022-02-24 03:36:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:55,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:36:55,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:36:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:36:55,912 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:56,363 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2022-02-24 03:36:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:36:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 03:36:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:56,364 INFO L225 Difference]: With dead ends: 54 [2022-02-24 03:36:56,364 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 03:36:56,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:36:56,364 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:56,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:36:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 03:36:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-02-24 03:36:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-02-24 03:36:56,373 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 23 [2022-02-24 03:36:56,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:56,373 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-02-24 03:36:56,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:56,373 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-02-24 03:36:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:36:56,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:56,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:56,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:36:56,374 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:56,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1227757058, now seen corresponding path program 3 times [2022-02-24 03:36:56,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:56,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601741381] [2022-02-24 03:36:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:56,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:56,504 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:56,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:56,554 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 03:36:56,578 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:56,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601741381] [2022-02-24 03:36:56,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [601741381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:56,579 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:56,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:36:56,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722450931] [2022-02-24 03:36:56,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:56,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:36:56,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:56,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:36:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:36:56,580 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:56,814 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-02-24 03:36:56,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:36:56,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:36:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:56,815 INFO L225 Difference]: With dead ends: 61 [2022-02-24 03:36:56,815 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:36:56,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:36:56,816 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:56,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:36:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2022-02-24 03:36:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2022-02-24 03:36:56,827 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 24 [2022-02-24 03:36:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:56,827 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2022-02-24 03:36:56,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2022-02-24 03:36:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:36:56,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:56,828 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:56,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:36:56,828 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1822836127, now seen corresponding path program 4 times [2022-02-24 03:36:56,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:56,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680988679] [2022-02-24 03:36:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:56,954 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:57,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:57,032 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 03:36:57,064 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:57,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680988679] [2022-02-24 03:36:57,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680988679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:57,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:57,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:36:57,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636388752] [2022-02-24 03:36:57,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:57,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:36:57,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:57,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:36:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:36:57,065 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:57,328 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-02-24 03:36:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:36:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:36:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:57,328 INFO L225 Difference]: With dead ends: 66 [2022-02-24 03:36:57,328 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:36:57,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:36:57,329 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:57,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:36:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2022-02-24 03:36:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-02-24 03:36:57,342 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 25 [2022-02-24 03:36:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:57,342 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-02-24 03:36:57,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-02-24 03:36:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:36:57,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:57,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:57,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:36:57,342 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:57,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash -137630238, now seen corresponding path program 4 times [2022-02-24 03:36:57,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:57,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952876608] [2022-02-24 03:36:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:57,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:57,475 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:57,599 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 03:36:57,634 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:57,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952876608] [2022-02-24 03:36:57,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1952876608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:57,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:57,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:36:57,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837170627] [2022-02-24 03:36:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:57,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:36:57,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:36:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:36:57,635 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:58,064 INFO L93 Difference]: Finished difference Result 105 states and 144 transitions. [2022-02-24 03:36:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:36:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:36:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:58,065 INFO L225 Difference]: With dead ends: 105 [2022-02-24 03:36:58,065 INFO L226 Difference]: Without dead ends: 69 [2022-02-24 03:36:58,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:36:58,066 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:58,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 72 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:36:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-24 03:36:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2022-02-24 03:36:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-02-24 03:36:58,081 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 26 [2022-02-24 03:36:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:58,081 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-02-24 03:36:58,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-02-24 03:36:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:36:58,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:58,082 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:58,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:36:58,082 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 62925025, now seen corresponding path program 5 times [2022-02-24 03:36:58,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:58,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922790273] [2022-02-24 03:36:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:58,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:58,215 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:58,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:58,262 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 03:36:58,288 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:58,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922790273] [2022-02-24 03:36:58,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [922790273] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:58,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:58,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:36:58,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098645679] [2022-02-24 03:36:58,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:58,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:36:58,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:58,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:36:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:36:58,290 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:58,484 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2022-02-24 03:36:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:36:58,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:36:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:58,485 INFO L225 Difference]: With dead ends: 71 [2022-02-24 03:36:58,485 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:36:58,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:36:58,485 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:58,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 37 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:36:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-24 03:36:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 57 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 83 transitions. [2022-02-24 03:36:58,500 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 83 transitions. Word has length 27 [2022-02-24 03:36:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:58,500 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 83 transitions. [2022-02-24 03:36:58,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,500 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 83 transitions. [2022-02-24 03:36:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:36:58,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:58,500 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:58,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:36:58,501 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash -438714480, now seen corresponding path program 6 times [2022-02-24 03:36:58,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:58,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665474923] [2022-02-24 03:36:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:58,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:58,638 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:58,682 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 03:36:58,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:58,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665474923] [2022-02-24 03:36:58,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [665474923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:58,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:58,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:36:58,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011653885] [2022-02-24 03:36:58,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:58,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:36:58,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:36:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:36:58,712 INFO L87 Difference]: Start difference. First operand 62 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:58,863 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2022-02-24 03:36:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:36:58,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:36:58,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:58,864 INFO L225 Difference]: With dead ends: 76 [2022-02-24 03:36:58,864 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 03:36:58,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:36:58,864 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:58,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 24 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:36:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 03:36:58,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-02-24 03:36:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-02-24 03:36:58,877 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 27 [2022-02-24 03:36:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:58,877 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-02-24 03:36:58,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-02-24 03:36:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:36:58,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:58,878 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:58,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:36:58,878 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash 149891424, now seen corresponding path program 5 times [2022-02-24 03:36:58,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:58,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716742795] [2022-02-24 03:36:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:58,963 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:59,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:36:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:36:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:36:59,209 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:36:59,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716742795] [2022-02-24 03:36:59,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1716742795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:36:59,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:36:59,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:36:59,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222315393] [2022-02-24 03:36:59,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:36:59,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:36:59,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:36:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:36:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:36:59,211 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:36:59,802 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-24 03:36:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:36:59,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:36:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:36:59,804 INFO L225 Difference]: With dead ends: 68 [2022-02-24 03:36:59,804 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 03:36:59,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:36:59,805 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:36:59,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:36:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 03:36:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-02-24 03:36:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 52 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2022-02-24 03:36:59,832 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 27 [2022-02-24 03:36:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:36:59,832 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2022-02-24 03:36:59,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:36:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2022-02-24 03:36:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:36:59,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:36:59,833 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:36:59,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:36:59,833 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:36:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:36:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1678337854, now seen corresponding path program 6 times [2022-02-24 03:36:59,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:36:59,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076848046] [2022-02-24 03:36:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:36:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:36:59,954 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:36:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:00,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:00,055 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 03:37:00,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:00,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076848046] [2022-02-24 03:37:00,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076848046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:00,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:00,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:37:00,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638997602] [2022-02-24 03:37:00,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:00,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:37:00,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:37:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:37:00,125 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:01,128 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2022-02-24 03:37:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:37:01,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:01,129 INFO L225 Difference]: With dead ends: 87 [2022-02-24 03:37:01,129 INFO L226 Difference]: Without dead ends: 61 [2022-02-24 03:37:01,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:37:01,130 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:01,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 68 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:37:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-24 03:37:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2022-02-24 03:37:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2022-02-24 03:37:01,143 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 27 [2022-02-24 03:37:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:01,144 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2022-02-24 03:37:01,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2022-02-24 03:37:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 03:37:01,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:01,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:01,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:37:01,145 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1788990354, now seen corresponding path program 7 times [2022-02-24 03:37:01,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:01,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764456187] [2022-02-24 03:37:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:01,267 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:01,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:01,357 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 03:37:01,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:01,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764456187] [2022-02-24 03:37:01,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [764456187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:01,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:01,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:37:01,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831849184] [2022-02-24 03:37:01,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:01,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:37:01,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:37:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:37:01,420 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:01,951 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2022-02-24 03:37:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:37:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:01,952 INFO L225 Difference]: With dead ends: 68 [2022-02-24 03:37:01,952 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 03:37:01,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:37:01,953 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:01,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 57 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:37:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 03:37:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-02-24 03:37:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:01,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-02-24 03:37:01,969 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 28 [2022-02-24 03:37:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:01,969 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-02-24 03:37:01,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-02-24 03:37:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 03:37:01,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:01,970 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:01,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:37:01,970 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1424549923, now seen corresponding path program 8 times [2022-02-24 03:37:01,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:01,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783815929] [2022-02-24 03:37:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:02,094 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:02,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:02,182 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 03:37:02,266 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:02,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783815929] [2022-02-24 03:37:02,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [783815929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:02,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:02,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:37:02,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282188486] [2022-02-24 03:37:02,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:02,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:37:02,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:37:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:37:02,268 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:02,755 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-02-24 03:37:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:37:02,756 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:02,756 INFO L225 Difference]: With dead ends: 102 [2022-02-24 03:37:02,756 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 03:37:02,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:37:02,760 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:02,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 47 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:37:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 03:37:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2022-02-24 03:37:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2022-02-24 03:37:02,780 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 28 [2022-02-24 03:37:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:02,780 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2022-02-24 03:37:02,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2022-02-24 03:37:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:37:02,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:02,781 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:02,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:37:02,781 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 22222479, now seen corresponding path program 9 times [2022-02-24 03:37:02,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:02,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791308124] [2022-02-24 03:37:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:02,899 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:03,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:03,004 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 03:37:03,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:03,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791308124] [2022-02-24 03:37:03,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1791308124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:03,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:03,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:37:03,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636599978] [2022-02-24 03:37:03,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:03,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:37:03,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:37:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:37:03,078 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:03,603 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-02-24 03:37:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:37:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:03,604 INFO L225 Difference]: With dead ends: 79 [2022-02-24 03:37:03,604 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:37:03,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:37:03,605 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:03,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 68 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:37:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:37:03,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-02-24 03:37:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.3) internal successors, (78), 60 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-02-24 03:37:03,623 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 29 [2022-02-24 03:37:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:03,623 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-02-24 03:37:03,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-02-24 03:37:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:37:03,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:03,623 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:03,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:37:03,624 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash 655213199, now seen corresponding path program 10 times [2022-02-24 03:37:03,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:03,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893540023] [2022-02-24 03:37:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:03,749 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:03,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:03,892 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 03:37:03,979 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:03,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893540023] [2022-02-24 03:37:03,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893540023] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:03,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:03,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:37:03,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791981351] [2022-02-24 03:37:03,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:03,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:37:03,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:37:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:37:03,981 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:06,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:06,514 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2022-02-24 03:37:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:37:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:06,516 INFO L225 Difference]: With dead ends: 122 [2022-02-24 03:37:06,516 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 03:37:06,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:37:06,517 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:06,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 88 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:37:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 03:37:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2022-02-24 03:37:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.289855072463768) internal successors, (89), 69 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2022-02-24 03:37:06,539 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 29 [2022-02-24 03:37:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:06,539 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2022-02-24 03:37:06,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2022-02-24 03:37:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:37:06,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:06,539 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:06,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:37:06,539 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash -227543310, now seen corresponding path program 11 times [2022-02-24 03:37:06,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:06,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810880763] [2022-02-24 03:37:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:06,652 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:06,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:06,778 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 03:37:06,872 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:06,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810880763] [2022-02-24 03:37:06,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1810880763] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:06,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:06,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:37:06,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023294623] [2022-02-24 03:37:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:06,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:37:06,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:37:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:37:06,873 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:07,475 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2022-02-24 03:37:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:37:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:07,476 INFO L225 Difference]: With dead ends: 121 [2022-02-24 03:37:07,476 INFO L226 Difference]: Without dead ends: 111 [2022-02-24 03:37:07,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:37:07,477 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:07,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 35 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:37:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-24 03:37:07,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2022-02-24 03:37:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 77 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2022-02-24 03:37:07,502 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 30 [2022-02-24 03:37:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:07,502 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2022-02-24 03:37:07,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2022-02-24 03:37:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 03:37:07,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:07,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:07,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:37:07,503 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:07,503 INFO L85 PathProgramCache]: Analyzing trace with hash -543637167, now seen corresponding path program 7 times [2022-02-24 03:37:07,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:07,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534199364] [2022-02-24 03:37:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:07,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:07,622 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:07,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:07,794 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 03:37:07,900 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:07,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534199364] [2022-02-24 03:37:07,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534199364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:07,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:07,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:37:07,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194160359] [2022-02-24 03:37:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:07,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:37:07,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:07,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:37:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:37:07,901 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:08,829 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2022-02-24 03:37:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:37:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:08,830 INFO L225 Difference]: With dead ends: 142 [2022-02-24 03:37:08,830 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 03:37:08,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:37:08,831 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:08,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 79 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:37:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 03:37:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2022-02-24 03:37:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 79 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-02-24 03:37:08,858 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 31 [2022-02-24 03:37:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:08,858 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-02-24 03:37:08,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-02-24 03:37:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:37:08,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:08,858 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:08,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:37:08,859 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash 361612114, now seen corresponding path program 8 times [2022-02-24 03:37:08,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:08,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82807692] [2022-02-24 03:37:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:08,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:08,968 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:09,051 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 03:37:09,123 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:09,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82807692] [2022-02-24 03:37:09,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [82807692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:09,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:09,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:37:09,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975178109] [2022-02-24 03:37:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:09,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:37:09,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:37:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:37:09,124 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:09,569 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2022-02-24 03:37:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:37:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:09,570 INFO L225 Difference]: With dead ends: 94 [2022-02-24 03:37:09,570 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 03:37:09,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:37:09,571 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:09,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 48 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:37:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 03:37:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-02-24 03:37:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 63 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-02-24 03:37:09,607 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 32 [2022-02-24 03:37:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:09,607 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-02-24 03:37:09,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-02-24 03:37:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:37:09,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:09,607 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:09,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:37:09,608 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:09,608 INFO L85 PathProgramCache]: Analyzing trace with hash 93956866, now seen corresponding path program 12 times [2022-02-24 03:37:09,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:09,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305868136] [2022-02-24 03:37:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:09,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:09,735 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:09,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:09,869 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 03:37:10,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:10,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305868136] [2022-02-24 03:37:10,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [305868136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:10,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:10,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:37:10,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61915081] [2022-02-24 03:37:10,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:10,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:37:10,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:37:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:37:10,008 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:11,081 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2022-02-24 03:37:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:37:11,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:11,082 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:37:11,082 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:37:11,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=1104, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:37:11,083 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:11,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:37:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:37:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2022-02-24 03:37:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:11,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-02-24 03:37:11,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 32 [2022-02-24 03:37:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:11,121 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-02-24 03:37:11,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-02-24 03:37:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:37:11,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:11,121 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:11,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:37:11,122 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:11,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2035160497, now seen corresponding path program 13 times [2022-02-24 03:37:11,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:11,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315742392] [2022-02-24 03:37:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:11,238 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:11,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:11,464 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 03:37:11,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:11,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315742392] [2022-02-24 03:37:11,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [315742392] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:11,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:11,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:37:11,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787105946] [2022-02-24 03:37:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:11,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:37:11,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:37:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:37:11,661 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:17,280 INFO L93 Difference]: Finished difference Result 155 states and 205 transitions. [2022-02-24 03:37:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 03:37:17,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:17,282 INFO L225 Difference]: With dead ends: 155 [2022-02-24 03:37:17,282 INFO L226 Difference]: Without dead ends: 127 [2022-02-24 03:37:17,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=695, Invalid=3861, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:37:17,283 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 140 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:17,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 89 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:37:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-24 03:37:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2022-02-24 03:37:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 83 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2022-02-24 03:37:17,314 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 32 [2022-02-24 03:37:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:17,314 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2022-02-24 03:37:17,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2022-02-24 03:37:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:37:17,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:17,315 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:17,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:37:17,315 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash -398850032, now seen corresponding path program 14 times [2022-02-24 03:37:17,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:17,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835641358] [2022-02-24 03:37:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:17,437 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:17,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:17,610 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 03:37:17,852 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:17,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835641358] [2022-02-24 03:37:17,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [835641358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:17,852 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:17,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:37:17,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618091993] [2022-02-24 03:37:17,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:17,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:37:17,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:37:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:37:17,853 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:18,988 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2022-02-24 03:37:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:37:18,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:18,990 INFO L225 Difference]: With dead ends: 153 [2022-02-24 03:37:18,990 INFO L226 Difference]: Without dead ends: 142 [2022-02-24 03:37:18,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:37:18,991 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:18,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 65 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:37:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-24 03:37:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 98. [2022-02-24 03:37:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.2903225806451613) internal successors, (120), 93 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2022-02-24 03:37:19,033 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 33 [2022-02-24 03:37:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:19,033 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2022-02-24 03:37:19,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2022-02-24 03:37:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:37:19,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:19,034 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:19,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:37:19,034 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1273237790, now seen corresponding path program 15 times [2022-02-24 03:37:19,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:19,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636031999] [2022-02-24 03:37:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:19,157 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:19,333 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 03:37:19,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:19,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636031999] [2022-02-24 03:37:19,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636031999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:19,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:19,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:37:19,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380270222] [2022-02-24 03:37:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:19,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:37:19,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:37:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:37:19,570 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:20,884 INFO L93 Difference]: Finished difference Result 117 states and 143 transitions. [2022-02-24 03:37:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:37:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:20,886 INFO L225 Difference]: With dead ends: 117 [2022-02-24 03:37:20,886 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 03:37:20,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:37:20,887 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:20,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 80 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:37:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 03:37:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2022-02-24 03:37:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2022-02-24 03:37:20,939 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 34 [2022-02-24 03:37:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:20,939 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2022-02-24 03:37:20,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2022-02-24 03:37:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:37:20,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:20,940 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:20,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:37:20,940 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1983137790, now seen corresponding path program 16 times [2022-02-24 03:37:20,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:20,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031656656] [2022-02-24 03:37:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:21,069 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:21,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:21,362 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 03:37:21,635 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:21,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031656656] [2022-02-24 03:37:21,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031656656] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:21,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:21,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:37:21,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490680719] [2022-02-24 03:37:21,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:21,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:37:21,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:37:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:37:21,636 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:33,409 INFO L93 Difference]: Finished difference Result 194 states and 257 transitions. [2022-02-24 03:37:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 03:37:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:33,410 INFO L225 Difference]: With dead ends: 194 [2022-02-24 03:37:33,411 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 03:37:33,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1162, Invalid=7210, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 03:37:33,412 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:33,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 98 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 03:37:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 03:37:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 109. [2022-02-24 03:37:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.2788461538461537) internal successors, (133), 104 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-02-24 03:37:33,455 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 34 [2022-02-24 03:37:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:33,456 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-02-24 03:37:33,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-02-24 03:37:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:37:33,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:33,456 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:33,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:37:33,456 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:33,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:33,457 INFO L85 PathProgramCache]: Analyzing trace with hash -412045345, now seen corresponding path program 17 times [2022-02-24 03:37:33,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:33,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184793910] [2022-02-24 03:37:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:33,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:33,578 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:33,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:33,805 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 03:37:34,166 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:34,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184793910] [2022-02-24 03:37:34,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [184793910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:34,167 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:34,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:37:34,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686807287] [2022-02-24 03:37:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:34,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:37:34,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:37:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:37:34,167 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:35,636 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2022-02-24 03:37:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:37:35,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 03:37:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:35,637 INFO L225 Difference]: With dead ends: 179 [2022-02-24 03:37:35,637 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 03:37:35,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:37:35,637 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:35,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 38 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:37:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 03:37:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2022-02-24 03:37:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.2719298245614035) internal successors, (145), 114 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 149 transitions. [2022-02-24 03:37:35,685 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 149 transitions. Word has length 35 [2022-02-24 03:37:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:35,685 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 149 transitions. [2022-02-24 03:37:35,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 149 transitions. [2022-02-24 03:37:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:37:35,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:35,685 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:35,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:37:35,686 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash 955015874, now seen corresponding path program 9 times [2022-02-24 03:37:35,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:35,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998719696] [2022-02-24 03:37:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:35,803 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:36,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:37:36,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:36,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998719696] [2022-02-24 03:37:36,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [998719696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:36,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:36,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:37:36,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811149427] [2022-02-24 03:37:36,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:36,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:37:36,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:37:36,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:37:36,474 INFO L87 Difference]: Start difference. First operand 119 states and 149 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:38,732 INFO L93 Difference]: Finished difference Result 199 states and 253 transitions. [2022-02-24 03:37:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:37:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 03:37:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:38,737 INFO L225 Difference]: With dead ends: 199 [2022-02-24 03:37:38,737 INFO L226 Difference]: Without dead ends: 139 [2022-02-24 03:37:38,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=226, Invalid=1754, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:37:38,738 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:38,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 91 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:37:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-24 03:37:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 121. [2022-02-24 03:37:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2022-02-24 03:37:38,793 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 36 [2022-02-24 03:37:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:38,793 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2022-02-24 03:37:38,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 18 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2022-02-24 03:37:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:37:38,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:38,793 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:38,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:37:38,794 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1466061842, now seen corresponding path program 18 times [2022-02-24 03:37:38,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:38,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483165876] [2022-02-24 03:37:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:38,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:38,876 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:39,062 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 03:37:39,387 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:39,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483165876] [2022-02-24 03:37:39,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1483165876] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:39,387 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:39,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:37:39,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246815717] [2022-02-24 03:37:39,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:39,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:37:39,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:37:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:37:39,388 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:42,567 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2022-02-24 03:37:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 03:37:42,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 03:37:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:42,569 INFO L225 Difference]: With dead ends: 163 [2022-02-24 03:37:42,569 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 03:37:42,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=545, Invalid=2425, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:37:42,570 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:42,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 47 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:37:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 03:37:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 122. [2022-02-24 03:37:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.2735042735042734) internal successors, (149), 117 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2022-02-24 03:37:42,641 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 36 [2022-02-24 03:37:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:42,641 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2022-02-24 03:37:42,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2022-02-24 03:37:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:37:42,643 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:42,643 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:42,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:37:42,643 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash -424783871, now seen corresponding path program 10 times [2022-02-24 03:37:42,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:42,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458410239] [2022-02-24 03:37:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:42,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:42,762 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:42,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:42,902 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 03:37:43,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:43,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458410239] [2022-02-24 03:37:43,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [458410239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:43,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:43,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:37:43,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704697455] [2022-02-24 03:37:43,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:37:43,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:37:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:37:43,223 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:44,867 INFO L93 Difference]: Finished difference Result 146 states and 177 transitions. [2022-02-24 03:37:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:37:44,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 03:37:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:44,868 INFO L225 Difference]: With dead ends: 146 [2022-02-24 03:37:44,868 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 03:37:44,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:37:44,869 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:44,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:37:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 03:37:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2022-02-24 03:37:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2022-02-24 03:37:44,921 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 37 [2022-02-24 03:37:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:44,922 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2022-02-24 03:37:44,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2022-02-24 03:37:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:37:44,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:44,922 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:44,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:37:44,922 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash 636983262, now seen corresponding path program 19 times [2022-02-24 03:37:44,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:44,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276928868] [2022-02-24 03:37:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:45,037 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:45,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:45,475 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 03:37:46,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:46,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276928868] [2022-02-24 03:37:46,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276928868] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:46,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:46,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:37:46,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369195833] [2022-02-24 03:37:46,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:46,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:37:46,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:37:46,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:37:46,399 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:38:15,771 INFO L93 Difference]: Finished difference Result 236 states and 312 transitions. [2022-02-24 03:38:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 03:38:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 03:38:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:38:15,772 INFO L225 Difference]: With dead ends: 236 [2022-02-24 03:38:15,772 INFO L226 Difference]: Without dead ends: 202 [2022-02-24 03:38:15,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3761 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=1619, Invalid=10371, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:38:15,775 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 262 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:38:15,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 109 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 03:38:15,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-24 03:38:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 126. [2022-02-24 03:38:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 121 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-02-24 03:38:15,848 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 37 [2022-02-24 03:38:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:38:15,848 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-02-24 03:38:15,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-02-24 03:38:15,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 03:38:15,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:38:15,849 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:38:15,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:38:15,849 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:38:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:38:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash -792671357, now seen corresponding path program 20 times [2022-02-24 03:38:15,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:38:15,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451055276] [2022-02-24 03:38:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:38:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:38:15,966 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:38:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:38:16,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:38:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:38:16,341 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 03:38:17,282 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:38:17,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451055276] [2022-02-24 03:38:17,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451055276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:38:17,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:38:17,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:38:17,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78392564] [2022-02-24 03:38:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:38:17,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:38:17,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:38:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:38:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:38:17,283 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:38:20,363 INFO L93 Difference]: Finished difference Result 218 states and 283 transitions. [2022-02-24 03:38:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:38:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 03:38:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:38:20,365 INFO L225 Difference]: With dead ends: 218 [2022-02-24 03:38:20,365 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 03:38:20,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:38:20,366 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 138 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:38:20,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 63 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:38:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 03:38:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 138. [2022-02-24 03:38:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.2706766917293233) internal successors, (169), 133 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 173 transitions. [2022-02-24 03:38:20,445 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 173 transitions. Word has length 38 [2022-02-24 03:38:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:38:20,445 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 173 transitions. [2022-02-24 03:38:20,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 173 transitions. [2022-02-24 03:38:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:38:20,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:38:20,446 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:38:20,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:38:20,446 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:38:20,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:38:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1500294481, now seen corresponding path program 21 times [2022-02-24 03:38:20,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:38:20,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674354898] [2022-02-24 03:38:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:38:20,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:38:20,579 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:38:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:38:20,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:38:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:38:20,860 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 03:38:21,812 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:38:21,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674354898] [2022-02-24 03:38:21,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674354898] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:38:21,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:38:21,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:38:21,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977295406] [2022-02-24 03:38:21,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:38:21,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:38:21,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:38:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:38:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:38:21,813 INFO L87 Difference]: Start difference. First operand 138 states and 173 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:38:26,077 INFO L93 Difference]: Finished difference Result 165 states and 200 transitions. [2022-02-24 03:38:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:38:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 03:38:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:38:26,078 INFO L225 Difference]: With dead ends: 165 [2022-02-24 03:38:26,078 INFO L226 Difference]: Without dead ends: 150 [2022-02-24 03:38:26,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:38:26,079 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:38:26,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 92 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:38:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-24 03:38:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2022-02-24 03:38:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.2615384615384615) internal successors, (164), 130 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2022-02-24 03:38:26,151 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 39 [2022-02-24 03:38:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:38:26,151 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2022-02-24 03:38:26,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:38:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2022-02-24 03:38:26,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:38:26,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:38:26,152 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:38:26,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:38:26,152 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:38:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:38:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash -274625873, now seen corresponding path program 22 times [2022-02-24 03:38:26,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:38:26,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107207278] [2022-02-24 03:38:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:38:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:38:26,234 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:38:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:38:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:38:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:38:26,871 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 03:38:28,112 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:38:28,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107207278] [2022-02-24 03:38:28,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [107207278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:38:28,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:38:28,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:38:28,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940203926] [2022-02-24 03:38:28,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:38:28,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:38:28,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:38:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:38:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:38:28,113 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:39:17,412 INFO L93 Difference]: Finished difference Result 284 states and 376 transitions. [2022-02-24 03:39:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 03:39:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 03:39:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:39:17,414 INFO L225 Difference]: With dead ends: 284 [2022-02-24 03:39:17,414 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 03:39:17,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6727 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=2442, Invalid=17018, Unknown=0, NotChecked=0, Total=19460 [2022-02-24 03:39:17,416 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 332 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:39:17,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 118 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-24 03:39:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 03:39:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 151. [2022-02-24 03:39:17,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.2671232876712328) internal successors, (185), 146 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2022-02-24 03:39:17,500 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 39 [2022-02-24 03:39:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:39:17,500 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2022-02-24 03:39:17,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2022-02-24 03:39:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:39:17,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:39:17,500 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:39:17,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:39:17,501 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:39:17,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:39:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1012216530, now seen corresponding path program 23 times [2022-02-24 03:39:17,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:39:17,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857050304] [2022-02-24 03:39:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:39:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:39:17,617 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:39:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:39:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:18,112 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 03:39:19,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:39:19,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857050304] [2022-02-24 03:39:19,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857050304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:39:19,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:39:19,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:39:19,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480925129] [2022-02-24 03:39:19,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:39:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:39:19,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:39:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:39:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:39:19,043 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:39:24,455 INFO L93 Difference]: Finished difference Result 249 states and 319 transitions. [2022-02-24 03:39:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:39:24,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 03:39:24,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:39:24,457 INFO L225 Difference]: With dead ends: 249 [2022-02-24 03:39:24,457 INFO L226 Difference]: Without dead ends: 237 [2022-02-24 03:39:24,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=360, Invalid=1199, Unknown=1, NotChecked=0, Total=1560 [2022-02-24 03:39:24,457 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:39:24,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 56 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:39:24,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-24 03:39:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2022-02-24 03:39:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.259493670886076) internal successors, (199), 158 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 203 transitions. [2022-02-24 03:39:24,547 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 203 transitions. Word has length 40 [2022-02-24 03:39:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:39:24,548 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 203 transitions. [2022-02-24 03:39:24,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 203 transitions. [2022-02-24 03:39:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:39:24,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:39:24,548 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:39:24,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:39:24,548 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:39:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:39:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash -358359038, now seen corresponding path program 24 times [2022-02-24 03:39:24,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:39:24,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186237795] [2022-02-24 03:39:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:39:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:39:24,664 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:39:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:24,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:39:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:24,989 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 03:39:25,678 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:39:25,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186237795] [2022-02-24 03:39:25,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [186237795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:39:25,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:39:25,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:39:25,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110661427] [2022-02-24 03:39:25,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:39:25,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:39:25,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:39:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:39:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:39:25,680 INFO L87 Difference]: Start difference. First operand 163 states and 203 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:39:32,666 INFO L93 Difference]: Finished difference Result 217 states and 275 transitions. [2022-02-24 03:39:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:39:32,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 03:39:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:39:32,668 INFO L225 Difference]: With dead ends: 217 [2022-02-24 03:39:32,668 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 03:39:32,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:39:32,669 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:39:32,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:39:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 03:39:32,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 171. [2022-02-24 03:39:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2469879518072289) internal successors, (207), 166 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2022-02-24 03:39:32,769 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 40 [2022-02-24 03:39:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:39:32,769 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2022-02-24 03:39:32,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2022-02-24 03:39:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:39:32,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:39:32,769 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:39:32,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:39:32,769 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:39:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:39:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash -264974095, now seen corresponding path program 11 times [2022-02-24 03:39:32,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:39:32,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548796841] [2022-02-24 03:39:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:39:32,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:39:32,887 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:39:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:33,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:39:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:33,446 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 03:39:34,567 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:39:34,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548796841] [2022-02-24 03:39:34,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [548796841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:39:34,568 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:39:34,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:39:34,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482239133] [2022-02-24 03:39:34,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:39:34,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:39:34,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:39:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:39:34,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:39:34,569 INFO L87 Difference]: Start difference. First operand 171 states and 211 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:39:40,374 INFO L93 Difference]: Finished difference Result 278 states and 346 transitions. [2022-02-24 03:39:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:39:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 03:39:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:39:40,376 INFO L225 Difference]: With dead ends: 278 [2022-02-24 03:39:40,376 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 03:39:40,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:39:40,376 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:39:40,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 113 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:39:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 03:39:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 166. [2022-02-24 03:39:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.2608695652173914) internal successors, (203), 161 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2022-02-24 03:39:40,484 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 41 [2022-02-24 03:39:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:39:40,484 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2022-02-24 03:39:40,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2022-02-24 03:39:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:39:40,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:39:40,484 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:39:40,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:39:40,485 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:39:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:39:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 410232754, now seen corresponding path program 12 times [2022-02-24 03:39:40,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:39:40,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477934196] [2022-02-24 03:39:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:39:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:39:40,576 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:39:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:40,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:39:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:40,853 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 03:39:41,778 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:39:41,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477934196] [2022-02-24 03:39:41,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [477934196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:39:41,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:39:41,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:39:41,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239043098] [2022-02-24 03:39:41,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:39:41,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:39:41,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:39:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:39:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:39:41,779 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:39:45,070 INFO L93 Difference]: Finished difference Result 199 states and 240 transitions. [2022-02-24 03:39:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:39:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 03:39:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:39:45,071 INFO L225 Difference]: With dead ends: 199 [2022-02-24 03:39:45,071 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 03:39:45,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:39:45,072 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:39:45,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 58 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:39:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 03:39:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2022-02-24 03:39:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.2567567567567568) internal successors, (186), 148 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 190 transitions. [2022-02-24 03:39:45,177 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 190 transitions. Word has length 42 [2022-02-24 03:39:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:39:45,177 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 190 transitions. [2022-02-24 03:39:45,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:39:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 190 transitions. [2022-02-24 03:39:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:39:45,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:39:45,178 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:39:45,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:39:45,178 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:39:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:39:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash 603994769, now seen corresponding path program 25 times [2022-02-24 03:39:45,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:39:45,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823570737] [2022-02-24 03:39:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:39:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:39:45,282 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:39:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:39:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:39:46,263 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 03:39:48,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:39:48,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823570737] [2022-02-24 03:39:48,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823570737] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:39:48,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:39:48,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:39:48,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508344077] [2022-02-24 03:39:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:39:48,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:39:48,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:39:48,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:39:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:39:48,598 INFO L87 Difference]: Start difference. First operand 153 states and 190 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:09,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 03:41:34,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:34,694 INFO L93 Difference]: Finished difference Result 335 states and 442 transitions. [2022-02-24 03:41:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-02-24 03:41:34,694 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 03:41:34,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:34,695 INFO L225 Difference]: With dead ends: 335 [2022-02-24 03:41:34,695 INFO L226 Difference]: Without dead ends: 295 [2022-02-24 03:41:34,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9185 ImplicationChecksByTransitivity, 95.7s TimeCoverageRelationStatistics Valid=3210, Invalid=22872, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:41:34,697 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 459 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:34,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 129 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-02-24 03:41:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-24 03:41:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 171. [2022-02-24 03:41:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2590361445783131) internal successors, (209), 166 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2022-02-24 03:41:34,817 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 42 [2022-02-24 03:41:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2022-02-24 03:41:34,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2022-02-24 03:41:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 03:41:34,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:34,818 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:34,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:41:34,818 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1815314640, now seen corresponding path program 26 times [2022-02-24 03:41:34,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:34,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100247185] [2022-02-24 03:41:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:34,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:34,898 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:35,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:35,697 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 03:41:38,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:38,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100247185] [2022-02-24 03:41:38,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [100247185] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:38,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:38,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:41:38,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331437965] [2022-02-24 03:41:38,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:38,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:41:38,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:41:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:41:38,327 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:45,372 INFO L93 Difference]: Finished difference Result 295 states and 379 transitions. [2022-02-24 03:41:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:41:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-24 03:41:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:45,373 INFO L225 Difference]: With dead ends: 295 [2022-02-24 03:41:45,373 INFO L226 Difference]: Without dead ends: 282 [2022-02-24 03:41:45,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=459, Invalid=1521, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:41:45,374 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 163 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:45,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 46 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:41:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-24 03:41:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 185. [2022-02-24 03:41:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 230 transitions. [2022-02-24 03:41:45,500 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 230 transitions. Word has length 43 [2022-02-24 03:41:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:45,500 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 230 transitions. [2022-02-24 03:41:45,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 230 transitions. [2022-02-24 03:41:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:41:45,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:45,501 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:45,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:41:45,503 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:45,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1831362498, now seen corresponding path program 27 times [2022-02-24 03:41:45,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:45,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803726439] [2022-02-24 03:41:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:45,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:45,624 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:46,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:46,460 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 03:41:49,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:49,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803726439] [2022-02-24 03:41:49,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [803726439] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:49,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:49,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:41:49,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935665171] [2022-02-24 03:41:49,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:49,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:41:49,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:41:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:41:49,033 INFO L87 Difference]: Start difference. First operand 185 states and 230 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:59,798 INFO L93 Difference]: Finished difference Result 222 states and 267 transitions. [2022-02-24 03:41:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:41:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:41:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:59,800 INFO L225 Difference]: With dead ends: 222 [2022-02-24 03:41:59,800 INFO L226 Difference]: Without dead ends: 205 [2022-02-24 03:41:59,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:41:59,800 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:59,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 109 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:41:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-24 03:41:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2022-02-24 03:41:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.25) internal successors, (220), 176 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 224 transitions. [2022-02-24 03:41:59,924 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 224 transitions. Word has length 44 [2022-02-24 03:41:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:59,924 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 224 transitions. [2022-02-24 03:41:59,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 224 transitions. [2022-02-24 03:41:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:41:59,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:59,924 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:59,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:41:59,925 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:59,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2066056290, now seen corresponding path program 28 times [2022-02-24 03:41:59,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:59,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884508839] [2022-02-24 03:41:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:59,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:00,044 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:42:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:01,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:01,746 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 03:42:05,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:05,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884508839] [2022-02-24 03:42:05,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [884508839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:05,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:05,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:42:05,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849880860] [2022-02-24 03:42:05,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:05,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:42:05,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:42:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:42:05,704 INFO L87 Difference]: Start difference. First operand 181 states and 224 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:50,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 03:45:40,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 03:45:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:59,832 INFO L93 Difference]: Finished difference Result 392 states and 518 transitions. [2022-02-24 03:45:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-24 03:45:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:45:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:59,834 INFO L225 Difference]: With dead ends: 392 [2022-02-24 03:45:59,834 INFO L226 Difference]: Without dead ends: 350 [2022-02-24 03:45:59,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14587 ImplicationChecksByTransitivity, 213.1s TimeCoverageRelationStatistics Valid=4528, Invalid=34478, Unknown=0, NotChecked=0, Total=39006 [2022-02-24 03:45:59,836 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 423 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 828 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:59,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 150 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 1794 Invalid, 1 Unknown, 0 Unchecked, 25.8s Time] [2022-02-24 03:45:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-24 03:45:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 200. [2022-02-24 03:45:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2564102564102564) internal successors, (245), 195 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 249 transitions. [2022-02-24 03:45:59,991 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 249 transitions. Word has length 44 [2022-02-24 03:45:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:59,991 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 249 transitions. [2022-02-24 03:45:59,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 249 transitions. [2022-02-24 03:45:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:45:59,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:59,991 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:59,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:45:59,992 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:59,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1174729874, now seen corresponding path program 29 times [2022-02-24 03:45:59,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:59,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027595211] [2022-02-24 03:45:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:00,117 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:01,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:01,263 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 03:46:04,335 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:04,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027595211] [2022-02-24 03:46:04,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027595211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:04,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:04,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:46:04,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099856239] [2022-02-24 03:46:04,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:04,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:46:04,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:46:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:46:04,336 INFO L87 Difference]: Start difference. First operand 200 states and 249 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:27,517 INFO L93 Difference]: Finished difference Result 265 states and 338 transitions. [2022-02-24 03:46:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 03:46:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:46:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:27,521 INFO L225 Difference]: With dead ends: 265 [2022-02-24 03:46:27,521 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 03:46:27,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=979, Invalid=4873, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 03:46:27,521 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:27,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-24 03:46:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 03:46:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 209. [2022-02-24 03:46:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.2450980392156863) internal successors, (254), 204 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2022-02-24 03:46:27,683 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 44 [2022-02-24 03:46:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2022-02-24 03:46:27,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2022-02-24 03:46:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 03:46:27,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:27,684 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:27,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:46:27,684 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 558919551, now seen corresponding path program 30 times [2022-02-24 03:46:27,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:27,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821820881] [2022-02-24 03:46:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:27,808 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:29,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:34,958 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:34,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821820881] [2022-02-24 03:46:34,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821820881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:34,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:34,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:46:34,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412695173] [2022-02-24 03:46:34,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:34,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:46:34,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:46:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:46:34,959 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:49,644 INFO L93 Difference]: Finished difference Result 340 states and 430 transitions. [2022-02-24 03:46:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:46:49,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-24 03:46:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:49,646 INFO L225 Difference]: With dead ends: 340 [2022-02-24 03:46:49,646 INFO L226 Difference]: Without dead ends: 327 [2022-02-24 03:46:49,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=483, Invalid=1679, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:46:49,646 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 151 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:49,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 69 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:46:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-02-24 03:46:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 223. [2022-02-24 03:46:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.238532110091743) internal successors, (270), 218 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 274 transitions. [2022-02-24 03:46:49,819 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 274 transitions. Word has length 45 [2022-02-24 03:46:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:49,819 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 274 transitions. [2022-02-24 03:46:49,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:49,819 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 274 transitions. [2022-02-24 03:46:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 03:46:49,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:49,820 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:49,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:46:49,820 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash 284721058, now seen corresponding path program 13 times [2022-02-24 03:46:49,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:49,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846262575] [2022-02-24 03:46:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:49,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:49,945 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:51,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:51,839 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 03:46:56,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:56,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846262575] [2022-02-24 03:46:56,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1846262575] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:56,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:56,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:46:56,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904419848] [2022-02-24 03:46:56,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:56,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:46:56,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:46:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:46:56,599 INFO L87 Difference]: Start difference. First operand 223 states and 274 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:18,415 INFO L93 Difference]: Finished difference Result 355 states and 438 transitions. [2022-02-24 03:47:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 03:47:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 03:47:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:18,419 INFO L225 Difference]: With dead ends: 355 [2022-02-24 03:47:18,419 INFO L226 Difference]: Without dead ends: 271 [2022-02-24 03:47:18,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=355, Invalid=3305, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:47:18,420 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 87 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:18,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 120 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:47:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-02-24 03:47:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 217. [2022-02-24 03:47:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.25) internal successors, (265), 212 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 269 transitions. [2022-02-24 03:47:18,595 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 269 transitions. Word has length 46 [2022-02-24 03:47:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 269 transitions. [2022-02-24 03:47:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 24 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 269 transitions. [2022-02-24 03:47:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:47:18,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:18,596 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:18,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:47:18,596 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 270913313, now seen corresponding path program 14 times [2022-02-24 03:47:18,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:18,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933426245] [2022-02-24 03:47:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:18,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:18,718 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:47:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:19,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:19,709 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 03:47:23,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:23,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933426245] [2022-02-24 03:47:23,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1933426245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:23,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:23,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:47:23,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454843325] [2022-02-24 03:47:23,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:23,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:47:23,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:47:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:47:23,164 INFO L87 Difference]: Start difference. First operand 217 states and 269 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:35,438 INFO L93 Difference]: Finished difference Result 261 states and 313 transitions. [2022-02-24 03:47:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:47:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 03:47:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:35,439 INFO L225 Difference]: With dead ends: 261 [2022-02-24 03:47:35,440 INFO L226 Difference]: Without dead ends: 226 [2022-02-24 03:47:35,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:47:35,440 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:35,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 63 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:47:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-24 03:47:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2022-02-24 03:47:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.2436548223350254) internal successors, (245), 197 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 249 transitions. [2022-02-24 03:47:35,618 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 249 transitions. Word has length 47 [2022-02-24 03:47:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:35,618 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 249 transitions. [2022-02-24 03:47:35,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 249 transitions. [2022-02-24 03:47:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:47:35,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:35,619 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:35,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:47:35,619 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1187131266, now seen corresponding path program 31 times [2022-02-24 03:47:35,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:35,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761729843] [2022-02-24 03:47:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:35,703 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:47:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:39,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:39,590 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 03:47:49,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:49,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761729843] [2022-02-24 03:47:49,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [761729843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:49,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:49,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:47:49,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277421165] [2022-02-24 03:47:49,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:49,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:47:49,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:47:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:47:49,252 INFO L87 Difference]: Start difference. First operand 202 states and 249 transitions. Second operand has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)