/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/mono-crafted_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:44:44,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:44:44,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:44:44,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:44:44,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:44:44,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:44:44,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:44:44,742 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 03:44:44,751 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:44:44,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:44:44,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:44:44,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:44:44,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:44:44,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:44:44,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:44:44,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:44:44,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:44:44,753 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:44:44,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:44:44,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:44:44,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:44:44,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:44:44,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:44:44,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:44:44,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:44:44,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:44:44,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:44:44,755 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:44:44,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:44:44,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:44:44,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:44:44,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:44:44,982 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:44:44,989 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:44:44,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-02-24 03:44:45,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248ced36f/22034f4884374610a91d37266bdbe7ee/FLAGb1604d800 [2022-02-24 03:44:45,399 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:44:45,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-02-24 03:44:45,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248ced36f/22034f4884374610a91d37266bdbe7ee/FLAGb1604d800 [2022-02-24 03:44:45,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/248ced36f/22034f4884374610a91d37266bdbe7ee [2022-02-24 03:44:45,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:44:45,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:44:45,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:44:45,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:44:45,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:44:45,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd91e9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45, skipping insertion in model container [2022-02-24 03:44:45,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:44:45,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:44:45,566 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/mono-crafted_13.c[319,332] [2022-02-24 03:44:45,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:44:45,586 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:44:45,593 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/mono-crafted_13.c[319,332] [2022-02-24 03:44:45,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:44:45,603 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:44:45,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45 WrapperNode [2022-02-24 03:44:45,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:44:45,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:44:45,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:44:45,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:44:45,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:44:45,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:44:45,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:44:45,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:44:45,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (1/1) ... [2022-02-24 03:44:45,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:44:45,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:44:45,652 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 03:44:45,666 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 03:44:45,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:44:45,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:44:45,684 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:44:45,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:44:45,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:44:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:44:45,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:44:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:44:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:44:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:44:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:44:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:44:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:44:45,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:44:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:44:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:44:45,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:44:45,728 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:44:45,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:44:45,861 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:44:45,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:44:45,865 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:44:45,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:44:45 BoogieIcfgContainer [2022-02-24 03:44:45,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:44:45,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:44:45,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:44:45,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:44:45,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:44:45" (1/3) ... [2022-02-24 03:44:45,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8bafe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:44:45, skipping insertion in model container [2022-02-24 03:44:45,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:45" (2/3) ... [2022-02-24 03:44:45,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8bafe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:44:45, skipping insertion in model container [2022-02-24 03:44:45,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:44:45" (3/3) ... [2022-02-24 03:44:45,871 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2022-02-24 03:44:45,875 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:44:45,875 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:44:45,943 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:44:45,964 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 03:44:45,965 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:44:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 03:44:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:44:46,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:46,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:46,002 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-02-24 03:44:46,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:46,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666292296] [2022-02-24 03:44:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:46,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:46,074 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:44:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:46,182 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 03:44:46,184 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:46,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666292296] [2022-02-24 03:44:46,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1666292296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:46,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:46,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:44:46,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266332191] [2022-02-24 03:44:46,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:46,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:44:46,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:44:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:44:46,215 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 03:44:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:46,261 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-24 03:44:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:44:46,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-02-24 03:44:46,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:46,275 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:44:46,275 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 03:44:46,277 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 03:44:46,283 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 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 03:44:46,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 03:44:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 03:44:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 03:44:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-24 03:44:46,317 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-24 03:44:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:46,317 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-24 03:44:46,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 03:44:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-24 03:44:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:44:46,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:46,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:46,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:44:46,320 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-02-24 03:44:46,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:46,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114375412] [2022-02-24 03:44:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:46,325 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:44:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:46,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:46,411 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 03:44:46,412 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:46,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114375412] [2022-02-24 03:44:46,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1114375412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:46,413 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:46,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:44:46,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297149966] [2022-02-24 03:44:46,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:46,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:44:46,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:46,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:44:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:44:46,417 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 03:44:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:46,455 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-02-24 03:44:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:44:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-02-24 03:44:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:46,457 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:44:46,457 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 03:44:46,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:44:46,460 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:46,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 03:44:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 03:44:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 03:44:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-24 03:44:46,470 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-24 03:44:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:46,471 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-24 03:44:46,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 03:44:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-24 03:44:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:44:46,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:46,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:46,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:44:46,472 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-02-24 03:44:46,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:46,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343013835] [2022-02-24 03:44:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:46,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:46,560 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:46,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:46,630 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 03:44:46,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:46,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343013835] [2022-02-24 03:44:46,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [343013835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:46,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:46,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:44:46,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424468006] [2022-02-24 03:44:46,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:46,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:44:46,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:44:46,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:44:46,676 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 03:44:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:46,748 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-24 03:44:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:44:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 14 [2022-02-24 03:44:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:46,749 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:44:46,749 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:44:46,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:44:46,755 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:46,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:44:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:44:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 03:44:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-24 03:44:46,765 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-24 03:44:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:46,765 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-24 03:44:46,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 03:44:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-24 03:44:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:44:46,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:46,766 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:46,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:44:46,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-02-24 03:44:46,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:46,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844369100] [2022-02-24 03:44:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:46,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:50,344 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:50,510 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:50,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:50,638 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 03:44:50,750 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:50,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844369100] [2022-02-24 03:44:50,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [844369100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:50,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:50,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:44:50,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114604710] [2022-02-24 03:44:50,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:50,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:44:50,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:50,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:44:50,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:44:50,752 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 03:44:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:50,913 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-24 03:44:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:44:50,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 03:44:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:50,915 INFO L225 Difference]: With dead ends: 39 [2022-02-24 03:44:50,915 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 03:44:50,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:44:50,920 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:50,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 03:44:50,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 03:44:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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 03:44:50,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-24 03:44:50,928 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-02-24 03:44:50,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:50,928 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-24 03:44:50,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 03:44:50,928 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-24 03:44:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:44:50,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:50,929 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:50,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:44:50,929 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:50,929 INFO L85 PathProgramCache]: Analyzing trace with hash -510493847, now seen corresponding path program 2 times [2022-02-24 03:44:50,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:50,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557499319] [2022-02-24 03:44:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:50,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:51,080 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:51,224 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:51,327 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 03:44:51,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:51,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557499319] [2022-02-24 03:44:51,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1557499319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:51,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:51,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:44:51,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489700448] [2022-02-24 03:44:51,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:51,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:44:51,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:44:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:44:51,434 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 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 03:44:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:51,597 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-24 03:44:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:44:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 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 03:44:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:51,598 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:44:51,598 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:44:51,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:44:51,599 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:51,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:44:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 03:44:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 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 03:44:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-24 03:44:51,604 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2022-02-24 03:44:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:51,604 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-24 03:44:51,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 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 03:44:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-24 03:44:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:44:51,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:51,605 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:51,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:44:51,605 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash 32415221, now seen corresponding path program 3 times [2022-02-24 03:44:51,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:51,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486832142] [2022-02-24 03:44:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:51,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:51,747 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:51,886 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:51,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:51,984 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 03:44:52,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:52,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486832142] [2022-02-24 03:44:52,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486832142] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:52,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:52,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:44:52,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944916312] [2022-02-24 03:44:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:52,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:44:52,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:44:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:44:52,096 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 03:44:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:52,277 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-02-24 03:44:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:44:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 25 [2022-02-24 03:44:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:52,278 INFO L225 Difference]: With dead ends: 47 [2022-02-24 03:44:52,278 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 03:44:52,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:44:52,279 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:52,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 44 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 03:44:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-24 03:44:52,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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 03:44:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-02-24 03:44:52,284 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2022-02-24 03:44:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:52,284 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-02-24 03:44:52,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 03:44:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-02-24 03:44:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 03:44:52,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:52,285 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:52,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:44:52,285 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash 29002067, now seen corresponding path program 4 times [2022-02-24 03:44:52,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:52,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140490791] [2022-02-24 03:44:52,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:52,419 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:52,549 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:52,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:52,656 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 03:44:52,805 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:52,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140490791] [2022-02-24 03:44:52,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140490791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:52,806 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:52,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:44:52,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474126277] [2022-02-24 03:44:52,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:52,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:44:52,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:52,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:44:52,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:44:52,807 INFO L87 Difference]: Start difference. First operand 33 states and 37 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 03:44:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:53,017 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-02-24 03:44:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:44:53,017 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 28 [2022-02-24 03:44:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:53,018 INFO L225 Difference]: With dead ends: 51 [2022-02-24 03:44:53,018 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 03:44:53,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=610, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:44:53,019 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:53,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 34 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 03:44:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-24 03:44:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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 03:44:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-02-24 03:44:53,023 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 28 [2022-02-24 03:44:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:53,023 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-02-24 03:44:53,023 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 03:44:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-02-24 03:44:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 03:44:53,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:53,024 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:53,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:44:53,024 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash -712049397, now seen corresponding path program 5 times [2022-02-24 03:44:53,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:53,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023113145] [2022-02-24 03:44:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:53,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:53,122 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:53,247 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:53,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:53,373 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 03:44:53,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:53,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023113145] [2022-02-24 03:44:53,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023113145] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:53,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:53,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:44:53,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377713269] [2022-02-24 03:44:53,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:53,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:44:53,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:44:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:44:53,517 INFO L87 Difference]: Start difference. First operand 36 states and 40 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 03:44:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:53,780 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-02-24 03:44:53,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:44:53,780 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 31 [2022-02-24 03:44:53,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:53,780 INFO L225 Difference]: With dead ends: 55 [2022-02-24 03:44:53,781 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 03:44:53,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:44:53,782 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:53,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 03:44:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 03:44:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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 03:44:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-02-24 03:44:53,786 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2022-02-24 03:44:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:53,786 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-02-24 03:44:53,786 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 03:44:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-02-24 03:44:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:44:53,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:53,787 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:53,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:44:53,787 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1166296381, now seen corresponding path program 6 times [2022-02-24 03:44:53,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:53,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562097864] [2022-02-24 03:44:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:53,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:53,914 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:54,038 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:54,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:54,154 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 03:44:54,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:54,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562097864] [2022-02-24 03:44:54,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [562097864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:54,272 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:54,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:44:54,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668159838] [2022-02-24 03:44:54,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:54,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:44:54,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:54,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:44:54,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:44:54,274 INFO L87 Difference]: Start difference. First operand 39 states and 43 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 03:44:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:54,571 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2022-02-24 03:44:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:44:54,571 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 34 [2022-02-24 03:44:54,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:54,574 INFO L225 Difference]: With dead ends: 72 [2022-02-24 03:44:54,574 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 03:44:54,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=429, Invalid=903, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:44:54,576 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:54,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 34 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 03:44:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2022-02-24 03:44:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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 03:44:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-02-24 03:44:54,594 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2022-02-24 03:44:54,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:54,594 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-02-24 03:44:54,594 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 03:44:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-02-24 03:44:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:44:54,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:54,595 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:44:54,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1446629159, now seen corresponding path program 7 times [2022-02-24 03:44:54,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:54,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658104051] [2022-02-24 03:44:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:54,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:54,684 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:54,754 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:54,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:54,906 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 03:44:55,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:55,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658104051] [2022-02-24 03:44:55,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658104051] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:55,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:55,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:44:55,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491683703] [2022-02-24 03:44:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:55,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:44:55,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:44:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=421, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:44:55,078 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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 03:44:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:55,483 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-02-24 03:44:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:44:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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 03:44:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:55,484 INFO L225 Difference]: With dead ends: 95 [2022-02-24 03:44:55,484 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:44:55,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=602, Invalid=1468, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:44:55,485 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:55,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 29 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:44:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-24 03:44:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 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 03:44:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-02-24 03:44:55,492 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 40 [2022-02-24 03:44:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:55,492 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-02-24 03:44:55,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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 03:44:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-02-24 03:44:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 03:44:55,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:55,493 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:55,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:44:55,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:55,493 INFO L85 PathProgramCache]: Analyzing trace with hash -873897673, now seen corresponding path program 8 times [2022-02-24 03:44:55,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:55,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439871793] [2022-02-24 03:44:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:55,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:55,661 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:55,801 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:55,995 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 03:44:56,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:56,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439871793] [2022-02-24 03:44:56,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [439871793] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:56,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:56,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:44:56,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153833592] [2022-02-24 03:44:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:56,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:44:56,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:44:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:44:56,220 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 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 03:44:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:56,711 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2022-02-24 03:44:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:44:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 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 03:44:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:56,716 INFO L225 Difference]: With dead ends: 99 [2022-02-24 03:44:56,716 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:44:56,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=710, Invalid=1740, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:44:56,718 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:56,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:44:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:44:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 03:44:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 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 03:44:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-02-24 03:44:56,724 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 43 [2022-02-24 03:44:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:56,724 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-02-24 03:44:56,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 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 03:44:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-02-24 03:44:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 03:44:56,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:56,725 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:56,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:44:56,725 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1503312111, now seen corresponding path program 9 times [2022-02-24 03:44:56,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:56,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040093686] [2022-02-24 03:44:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:56,858 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:56,988 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:57,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:57,168 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 03:44:57,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:57,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040093686] [2022-02-24 03:44:57,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2040093686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:57,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:57,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:44:57,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550784598] [2022-02-24 03:44:57,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:57,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:44:57,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:44:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:44:57,394 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 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 03:44:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:57,862 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-02-24 03:44:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:44:57,862 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 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 03:44:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:57,863 INFO L225 Difference]: With dead ends: 103 [2022-02-24 03:44:57,864 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:44:57,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=827, Invalid=2035, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:44:57,865 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:57,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 19 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:44:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:44:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-24 03:44:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 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 03:44:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-02-24 03:44:57,891 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 46 [2022-02-24 03:44:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:57,891 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-02-24 03:44:57,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 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 03:44:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-02-24 03:44:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 03:44:57,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:57,895 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:57,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:44:57,895 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1125066317, now seen corresponding path program 10 times [2022-02-24 03:44:57,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:57,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967244233] [2022-02-24 03:44:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:58,006 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:58,150 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:58,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:58,384 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 03:44:58,623 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:58,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967244233] [2022-02-24 03:44:58,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [967244233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:58,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:58,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:44:58,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562034565] [2022-02-24 03:44:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:58,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:44:58,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:44:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:44:58,625 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 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 03:44:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:59,241 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2022-02-24 03:44:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:44:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 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 49 [2022-02-24 03:44:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:59,242 INFO L225 Difference]: With dead ends: 107 [2022-02-24 03:44:59,242 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 03:44:59,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=953, Invalid=2353, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:44:59,244 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:59,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 34 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:44:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 03:44:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-02-24 03:44:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 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 03:44:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-02-24 03:44:59,251 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 49 [2022-02-24 03:44:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:59,251 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-02-24 03:44:59,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 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 03:44:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-02-24 03:44:59,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 03:44:59,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:59,252 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:59,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:44:59,252 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:59,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1949250309, now seen corresponding path program 11 times [2022-02-24 03:44:59,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:59,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482142746] [2022-02-24 03:44:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:59,359 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:59,471 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:59,702 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 03:44:59,972 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:59,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482142746] [2022-02-24 03:44:59,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1482142746] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:59,972 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:59,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:44:59,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415905491] [2022-02-24 03:44:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:59,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:44:59,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:44:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:44:59,973 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 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 03:45:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:00,596 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-02-24 03:45:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:45:00,597 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 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 52 [2022-02-24 03:45:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:00,597 INFO L225 Difference]: With dead ends: 111 [2022-02-24 03:45:00,597 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 03:45:00,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1075, Invalid=2707, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:45:00,599 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:00,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:45:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 03:45:00,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-24 03:45:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 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 03:45:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-02-24 03:45:00,604 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 52 [2022-02-24 03:45:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:00,605 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-02-24 03:45:00,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 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 03:45:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-02-24 03:45:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 03:45:00,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:00,605 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:00,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:45:00,605 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1330131613, now seen corresponding path program 12 times [2022-02-24 03:45:00,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:00,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967769715] [2022-02-24 03:45:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:00,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:00,708 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:00,776 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:01,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:01,028 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 03:45:01,306 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:01,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967769715] [2022-02-24 03:45:01,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967769715] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:01,306 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:01,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:45:01,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988096383] [2022-02-24 03:45:01,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:01,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:45:01,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:45:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=811, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:45:01,308 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 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 03:45:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:01,854 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-02-24 03:45:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:45:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 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 55 [2022-02-24 03:45:01,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:01,855 INFO L225 Difference]: With dead ends: 115 [2022-02-24 03:45:01,855 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 03:45:01,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1232, Invalid=3058, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:45:01,856 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:01,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:45:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 03:45:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-02-24 03:45:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 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 03:45:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-02-24 03:45:01,862 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 55 [2022-02-24 03:45:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-02-24 03:45:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 32 states have internal predecessors, (51), 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 03:45:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-02-24 03:45:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 03:45:01,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:01,862 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:01,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:45:01,863 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1501987045, now seen corresponding path program 13 times [2022-02-24 03:45:01,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:01,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233464827] [2022-02-24 03:45:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:01,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:01,961 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:02,055 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:02,307 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 03:45:02,601 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:02,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233464827] [2022-02-24 03:45:02,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [233464827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:02,601 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:02,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:45:02,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551233542] [2022-02-24 03:45:02,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:02,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:45:02,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:45:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:45:02,603 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 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 03:45:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:03,418 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2022-02-24 03:45:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:45:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 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 58 [2022-02-24 03:45:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:03,419 INFO L225 Difference]: With dead ends: 119 [2022-02-24 03:45:03,419 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:45:03,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1370, Invalid=3460, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:45:03,422 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:03,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 49 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:45:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:45:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 03:45:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 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 03:45:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-02-24 03:45:03,431 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 58 [2022-02-24 03:45:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:03,431 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-02-24 03:45:03,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 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 03:45:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-02-24 03:45:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 03:45:03,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:03,432 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:03,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:45:03,432 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:03,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1183238535, now seen corresponding path program 14 times [2022-02-24 03:45:03,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:03,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104440068] [2022-02-24 03:45:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:03,570 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:03,703 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:03,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:03,972 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 03:45:04,263 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:04,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104440068] [2022-02-24 03:45:04,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1104440068] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:04,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:04,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:45:04,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531638078] [2022-02-24 03:45:04,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:04,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:45:04,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:45:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:45:04,265 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 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 03:45:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:05,166 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2022-02-24 03:45:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:45:05,166 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 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 61 [2022-02-24 03:45:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:05,167 INFO L225 Difference]: With dead ends: 123 [2022-02-24 03:45:05,167 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 03:45:05,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1547, Invalid=3855, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:45:05,169 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:05,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 29 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:45:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 03:45:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-02-24 03:45:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 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 03:45:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-02-24 03:45:05,175 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 61 [2022-02-24 03:45:05,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:05,175 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-02-24 03:45:05,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 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 03:45:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-02-24 03:45:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 03:45:05,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:05,176 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:05,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:45:05,176 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2043708111, now seen corresponding path program 15 times [2022-02-24 03:45:05,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:05,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725505339] [2022-02-24 03:45:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:05,317 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:05,434 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:05,707 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 03:45:06,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:06,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725505339] [2022-02-24 03:45:06,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725505339] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:06,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:06,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:45:06,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546294934] [2022-02-24 03:45:06,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:06,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:45:06,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:45:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1105, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:45:06,041 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 39 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 38 states have internal predecessors, (60), 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 03:45:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:06,844 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-02-24 03:45:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:45:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 38 states have internal predecessors, (60), 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 64 [2022-02-24 03:45:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:06,844 INFO L225 Difference]: With dead ends: 127 [2022-02-24 03:45:06,844 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 03:45:06,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1718, Invalid=4288, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:45:06,846 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:06,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 34 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:45:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 03:45:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-24 03:45:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 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 03:45:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-02-24 03:45:06,858 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 64 [2022-02-24 03:45:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:06,859 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-02-24 03:45:06,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 38 states have internal predecessors, (60), 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 03:45:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-02-24 03:45:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 03:45:06,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:06,859 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:06,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:45:06,859 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1649852017, now seen corresponding path program 16 times [2022-02-24 03:45:06,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:06,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982739182] [2022-02-24 03:45:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:06,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:06,962 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:07,072 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:07,343 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 03:45:07,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:07,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982739182] [2022-02-24 03:45:07,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [982739182] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:07,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:07,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 03:45:07,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377152183] [2022-02-24 03:45:07,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:07,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 03:45:07,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 03:45:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1213, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:45:07,624 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 40 states have internal predecessors, (63), 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 03:45:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:08,378 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2022-02-24 03:45:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:45:08,378 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 40 states have internal predecessors, (63), 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 67 [2022-02-24 03:45:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:08,379 INFO L225 Difference]: With dead ends: 131 [2022-02-24 03:45:08,379 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 03:45:08,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1898, Invalid=4744, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:45:08,381 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:08,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 59 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:45:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 03:45:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-24 03:45:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 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 03:45:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-02-24 03:45:08,387 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 67 [2022-02-24 03:45:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:08,387 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-02-24 03:45:08,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 40 states have internal predecessors, (63), 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 03:45:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-02-24 03:45:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 03:45:08,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:08,389 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:08,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:45:08,389 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2009533767, now seen corresponding path program 17 times [2022-02-24 03:45:08,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:08,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274821708] [2022-02-24 03:45:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:08,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:08,486 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:08,575 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:08,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:08,941 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 03:45:09,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:09,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274821708] [2022-02-24 03:45:09,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274821708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:09,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:09,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 03:45:09,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613496708] [2022-02-24 03:45:09,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:09,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 03:45:09,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:09,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 03:45:09,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=1326, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:45:09,302 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 42 states have internal predecessors, (66), 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 03:45:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:10,390 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-02-24 03:45:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 03:45:10,390 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 42 states have internal predecessors, (66), 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 70 [2022-02-24 03:45:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:10,391 INFO L225 Difference]: With dead ends: 135 [2022-02-24 03:45:10,391 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:45:10,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2087, Invalid=5223, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:45:10,392 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:10,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 44 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:45:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:45:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-02-24 03:45:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 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 03:45:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-02-24 03:45:10,398 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 70 [2022-02-24 03:45:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:10,398 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-02-24 03:45:10,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 42 states have internal predecessors, (66), 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 03:45:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-02-24 03:45:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 03:45:10,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:10,400 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:10,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:45:10,400 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:10,401 INFO L85 PathProgramCache]: Analyzing trace with hash 526241445, now seen corresponding path program 18 times [2022-02-24 03:45:10,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:10,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435803754] [2022-02-24 03:45:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:10,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:10,523 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:10,631 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:10,957 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 03:45:11,282 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:11,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435803754] [2022-02-24 03:45:11,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [435803754] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:11,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:11,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:45:11,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649452321] [2022-02-24 03:45:11,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:11,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:45:11,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:45:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=1444, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:45:11,286 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 states have internal predecessors, (69), 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 03:45:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:12,158 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2022-02-24 03:45:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:45:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 states have internal predecessors, (69), 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 73 [2022-02-24 03:45:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:12,159 INFO L225 Difference]: With dead ends: 139 [2022-02-24 03:45:12,159 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 03:45:12,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2285, Invalid=5725, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:45:12,161 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:12,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 24 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:45:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 03:45:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-24 03:45:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 90 states have internal predecessors, (95), 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 03:45:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-02-24 03:45:12,169 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 73 [2022-02-24 03:45:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:12,170 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-02-24 03:45:12,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 states have internal predecessors, (69), 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 03:45:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-02-24 03:45:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 03:45:12,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:12,170 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:12,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:45:12,170 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1804202147, now seen corresponding path program 19 times [2022-02-24 03:45:12,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:12,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977630381] [2022-02-24 03:45:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:12,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:12,317 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:12,454 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:12,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:13,215 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:13,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977630381] [2022-02-24 03:45:13,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977630381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:13,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:13,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 03:45:13,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943043933] [2022-02-24 03:45:13,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:13,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 03:45:13,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 03:45:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=883, Invalid=1567, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:45:13,217 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 47 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 46 states have internal predecessors, (72), 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 03:45:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:14,522 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2022-02-24 03:45:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 03:45:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 46 states have internal predecessors, (72), 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 76 [2022-02-24 03:45:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:14,524 INFO L225 Difference]: With dead ends: 143 [2022-02-24 03:45:14,525 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 03:45:14,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2492, Invalid=6250, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 03:45:14,526 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:14,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 24 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:45:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 03:45:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-02-24 03:45:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 states have internal predecessors, (98), 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 03:45:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-02-24 03:45:14,533 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 76 [2022-02-24 03:45:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:14,533 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-02-24 03:45:14,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 46 states have internal predecessors, (72), 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 03:45:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-02-24 03:45:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 03:45:14,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:14,534 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:14,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:45:14,534 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1751956923, now seen corresponding path program 20 times [2022-02-24 03:45:14,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:14,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829282737] [2022-02-24 03:45:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:14,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:14,643 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:14,747 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:15,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:15,171 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 03:45:15,647 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:15,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829282737] [2022-02-24 03:45:15,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [829282737] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:15,648 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:15,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 03:45:15,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266951007] [2022-02-24 03:45:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:15,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 03:45:15,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 03:45:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=1695, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 03:45:15,649 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 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 03:45:16,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:16,880 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2022-02-24 03:45:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 03:45:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 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 79 [2022-02-24 03:45:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:16,881 INFO L225 Difference]: With dead ends: 147 [2022-02-24 03:45:16,881 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 03:45:16,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2708, Invalid=6798, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 03:45:16,882 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:16,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 29 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:45:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 03:45:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-24 03:45:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 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 03:45:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-02-24 03:45:16,888 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 79 [2022-02-24 03:45:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:16,889 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-02-24 03:45:16,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 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 03:45:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-02-24 03:45:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 03:45:16,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:16,889 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:16,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:45:16,889 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1875745933, now seen corresponding path program 21 times [2022-02-24 03:45:16,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:16,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540222113] [2022-02-24 03:45:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:16,996 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:17,114 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:17,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:17,525 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 03:45:17,993 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:17,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540222113] [2022-02-24 03:45:17,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1540222113] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:17,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:17,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 03:45:17,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568889268] [2022-02-24 03:45:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:17,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:45:17,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:45:17,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=1851, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:45:17,995 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 50 states have internal predecessors, (78), 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 03:45:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:19,467 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2022-02-24 03:45:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:45:19,467 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 50 states have internal predecessors, (78), 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 82 [2022-02-24 03:45:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:19,468 INFO L225 Difference]: With dead ends: 151 [2022-02-24 03:45:19,468 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 03:45:19,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3064 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2910, Invalid=7392, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:45:19,470 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:19,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 29 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:45:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 03:45:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-24 03:45:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 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 03:45:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-02-24 03:45:19,476 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 82 [2022-02-24 03:45:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:19,476 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-02-24 03:45:19,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 50 states have internal predecessors, (78), 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 03:45:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-02-24 03:45:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 03:45:19,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:19,477 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:19,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:45:19,477 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -261361967, now seen corresponding path program 22 times [2022-02-24 03:45:19,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:19,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376720134] [2022-02-24 03:45:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:19,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:19,608 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:19,734 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:20,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:20,229 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 03:45:20,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:20,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376720134] [2022-02-24 03:45:20,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376720134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:20,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:20,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 03:45:20,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713525562] [2022-02-24 03:45:20,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:20,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 03:45:20,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 03:45:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=1966, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:45:20,608 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 52 states have internal predecessors, (81), 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 03:45:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:21,762 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2022-02-24 03:45:21,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 03:45:21,767 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 52 states have internal predecessors, (81), 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 85 [2022-02-24 03:45:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:21,776 INFO L225 Difference]: With dead ends: 155 [2022-02-24 03:45:21,776 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 03:45:21,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3167, Invalid=7963, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 03:45:21,791 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 205 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:21,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 34 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:45:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 03:45:21,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-02-24 03:45:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 102 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 03:45:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-02-24 03:45:21,818 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 85 [2022-02-24 03:45:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:21,818 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-02-24 03:45:21,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 52 states have internal predecessors, (81), 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 03:45:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-02-24 03:45:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 03:45:21,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:21,819 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:21,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:45:21,819 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1615730295, now seen corresponding path program 23 times [2022-02-24 03:45:21,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:21,819 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199526608] [2022-02-24 03:45:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:21,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:21,929 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:22,030 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:22,428 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 03:45:22,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:22,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199526608] [2022-02-24 03:45:22,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199526608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:22,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:22,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 03:45:22,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885355147] [2022-02-24 03:45:22,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:22,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 03:45:22,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 03:45:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1197, Invalid=2109, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:45:22,831 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 55 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 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 03:45:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:24,150 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2022-02-24 03:45:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 03:45:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 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 88 [2022-02-24 03:45:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:24,151 INFO L225 Difference]: With dead ends: 159 [2022-02-24 03:45:24,151 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 03:45:24,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3585 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3410, Invalid=8580, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:45:24,152 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:24,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 49 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1616 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:45:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 03:45:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-24 03:45:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 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 03:45:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-02-24 03:45:24,159 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 88 [2022-02-24 03:45:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:24,159 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-02-24 03:45:24,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 54 states have internal predecessors, (84), 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 03:45:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-02-24 03:45:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 03:45:24,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:24,159 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:24,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:45:24,160 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1655783911, now seen corresponding path program 24 times [2022-02-24 03:45:24,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:24,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608089053] [2022-02-24 03:45:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:24,288 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:24,415 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:24,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:24,798 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 03:45:25,293 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:25,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608089053] [2022-02-24 03:45:25,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [608089053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:25,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:25,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 03:45:25,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289869631] [2022-02-24 03:45:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:25,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 03:45:25,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 03:45:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=2257, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:45:25,295 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 57 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 56 states have internal predecessors, (87), 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 03:45:26,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:26,940 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2022-02-24 03:45:26,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 03:45:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 56 states have internal predecessors, (87), 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 91 [2022-02-24 03:45:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:26,944 INFO L225 Difference]: With dead ends: 163 [2022-02-24 03:45:26,944 INFO L226 Difference]: Without dead ends: 113 [2022-02-24 03:45:26,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3662, Invalid=9220, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:45:26,946 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:26,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 24 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:45:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-24 03:45:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-02-24 03:45:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 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 03:45:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-02-24 03:45:26,973 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 91 [2022-02-24 03:45:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:26,973 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-02-24 03:45:26,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 56 states have internal predecessors, (87), 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 03:45:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-02-24 03:45:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 03:45:26,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:26,974 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:26,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:45:26,974 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1584038303, now seen corresponding path program 25 times [2022-02-24 03:45:26,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:26,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528796994] [2022-02-24 03:45:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:26,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:27,100 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:27,231 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:27,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:27,643 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 03:45:28,225 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:28,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528796994] [2022-02-24 03:45:28,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1528796994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:28,225 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:28,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 03:45:28,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749448185] [2022-02-24 03:45:28,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:28,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 03:45:28,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:28,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 03:45:28,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:45:28,227 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 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 03:45:29,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:29,939 INFO L93 Difference]: Finished difference Result 206 states and 255 transitions. [2022-02-24 03:45:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 03:45:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 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 94 [2022-02-24 03:45:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:29,940 INFO L225 Difference]: With dead ends: 206 [2022-02-24 03:45:29,940 INFO L226 Difference]: Without dead ends: 155 [2022-02-24 03:45:29,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4054 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3999, Invalid=9573, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:45:29,942 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 39 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:45:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-24 03:45:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2022-02-24 03:45:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 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 03:45:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-02-24 03:45:29,951 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2022-02-24 03:45:29,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:29,951 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-02-24 03:45:29,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 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 03:45:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-02-24 03:45:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-24 03:45:29,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:29,953 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:29,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:45:29,953 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1265497163, now seen corresponding path program 26 times [2022-02-24 03:45:29,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:29,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511645263] [2022-02-24 03:45:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:30,093 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:30,206 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:30,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:30,827 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 03:45:31,331 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:31,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511645263] [2022-02-24 03:45:31,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [511645263] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:31,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:31,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:45:31,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652532384] [2022-02-24 03:45:31,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:31,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:45:31,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:45:31,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=2731, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:45:31,333 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 62 states have internal predecessors, (96), 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 03:45:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:33,203 INFO L93 Difference]: Finished difference Result 255 states and 266 transitions. [2022-02-24 03:45:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:45:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 62 states have internal predecessors, (96), 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 100 [2022-02-24 03:45:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:33,209 INFO L225 Difference]: With dead ends: 255 [2022-02-24 03:45:33,209 INFO L226 Difference]: Without dead ends: 162 [2022-02-24 03:45:33,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4737 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4472, Invalid=11278, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 03:45:33,211 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:33,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 44 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:45:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-24 03:45:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-02-24 03:45:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 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 03:45:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-02-24 03:45:33,226 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 100 [2022-02-24 03:45:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:33,226 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-02-24 03:45:33,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 62 states have internal predecessors, (96), 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 03:45:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-02-24 03:45:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-24 03:45:33,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:33,226 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:33,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:45:33,227 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:33,227 INFO L85 PathProgramCache]: Analyzing trace with hash 438685203, now seen corresponding path program 27 times [2022-02-24 03:45:33,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:33,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918966451] [2022-02-24 03:45:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:33,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:33,359 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:33,453 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:34,008 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 03:45:34,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:34,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918966451] [2022-02-24 03:45:34,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [918966451] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:34,663 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:34,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 03:45:34,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609228605] [2022-02-24 03:45:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:34,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 03:45:34,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 03:45:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1627, Invalid=2929, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:45:34,665 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 65 states, 65 states have (on average 1.523076923076923) internal successors, (99), 64 states have internal predecessors, (99), 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 03:45:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:36,882 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2022-02-24 03:45:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 03:45:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.523076923076923) internal successors, (99), 64 states have internal predecessors, (99), 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 103 [2022-02-24 03:45:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:36,883 INFO L225 Difference]: With dead ends: 259 [2022-02-24 03:45:36,883 INFO L226 Difference]: Without dead ends: 165 [2022-02-24 03:45:36,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4730, Invalid=12040, Unknown=0, NotChecked=0, Total=16770 [2022-02-24 03:45:36,886 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 319 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:36,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 39 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:45:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-24 03:45:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-02-24 03:45:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.03125) internal successors, (165), 160 states have internal predecessors, (165), 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 03:45:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2022-02-24 03:45:36,898 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 103 [2022-02-24 03:45:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:36,898 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2022-02-24 03:45:36,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.523076923076923) internal successors, (99), 64 states have internal predecessors, (99), 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 03:45:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2022-02-24 03:45:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-24 03:45:36,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:36,899 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:36,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:45:36,899 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1122080821, now seen corresponding path program 28 times [2022-02-24 03:45:36,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:36,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820466876] [2022-02-24 03:45:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:37,041 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:37,172 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:37,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:37,658 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 03:45:38,276 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:38,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820466876] [2022-02-24 03:45:38,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [820466876] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:38,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:38,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 03:45:38,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422499793] [2022-02-24 03:45:38,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:38,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 03:45:38,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 03:45:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1758, Invalid=3072, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:45:38,278 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 67 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 66 states have internal predecessors, (102), 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 03:45:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:39,916 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2022-02-24 03:45:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 03:45:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 66 states have internal predecessors, (102), 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 106 [2022-02-24 03:45:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:39,917 INFO L225 Difference]: With dead ends: 263 [2022-02-24 03:45:39,917 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 03:45:39,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5373 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5057, Invalid=12765, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 03:45:39,919 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:39,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 24 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:45:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 03:45:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-02-24 03:45:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 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 03:45:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-02-24 03:45:39,932 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 106 [2022-02-24 03:45:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:39,933 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-02-24 03:45:39,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 66 states have internal predecessors, (102), 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 03:45:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-02-24 03:45:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 03:45:39,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:39,933 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:39,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:45:39,934 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash -826226903, now seen corresponding path program 29 times [2022-02-24 03:45:39,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:39,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915725630] [2022-02-24 03:45:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:39,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:40,048 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:40,191 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:40,790 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 03:45:41,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:41,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915725630] [2022-02-24 03:45:41,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1915725630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:41,374 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:41,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 03:45:41,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458633645] [2022-02-24 03:45:41,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:41,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 03:45:41,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:41,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 03:45:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=3282, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:45:41,377 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 68 states have internal predecessors, (105), 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 03:45:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:43,459 INFO L93 Difference]: Finished difference Result 267 states and 277 transitions. [2022-02-24 03:45:43,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 03:45:43,460 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 68 states have internal predecessors, (105), 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 109 [2022-02-24 03:45:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:43,460 INFO L225 Difference]: With dead ends: 267 [2022-02-24 03:45:43,460 INFO L226 Difference]: Without dead ends: 171 [2022-02-24 03:45:43,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5701 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5331, Invalid=13575, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 03:45:43,462 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:43,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 44 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:45:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-24 03:45:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-02-24 03:45:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 states have internal predecessors, (171), 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 03:45:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-02-24 03:45:43,475 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 109 [2022-02-24 03:45:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:43,475 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-02-24 03:45:43,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 68 states have internal predecessors, (105), 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 03:45:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-02-24 03:45:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-02-24 03:45:43,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:43,476 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:43,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:45:43,476 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1413122591, now seen corresponding path program 30 times [2022-02-24 03:45:43,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:43,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753259383] [2022-02-24 03:45:43,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:43,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:43,584 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:43,727 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:44,430 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 03:45:45,212 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:45,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753259383] [2022-02-24 03:45:45,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753259383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:45,212 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:45,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 03:45:45,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891471671] [2022-02-24 03:45:45,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:45,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 03:45:45,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:45,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 03:45:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1936, Invalid=3466, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:45:45,215 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 71 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 70 states have internal predecessors, (108), 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 03:45:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:47,359 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2022-02-24 03:45:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 03:45:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 70 states have internal predecessors, (108), 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 112 [2022-02-24 03:45:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:47,384 INFO L225 Difference]: With dead ends: 271 [2022-02-24 03:45:47,384 INFO L226 Difference]: Without dead ends: 174 [2022-02-24 03:45:47,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6044 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5645, Invalid=14377, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 03:45:47,385 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:47,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 39 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:45:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-24 03:45:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-02-24 03:45:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 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 03:45:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-02-24 03:45:47,419 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 112 [2022-02-24 03:45:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:47,419 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-02-24 03:45:47,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 70 states have internal predecessors, (108), 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 03:45:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-02-24 03:45:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-24 03:45:47,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:47,420 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:47,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:45:47,420 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:47,421 INFO L85 PathProgramCache]: Analyzing trace with hash 410608191, now seen corresponding path program 31 times [2022-02-24 03:45:47,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:47,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118690902] [2022-02-24 03:45:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:47,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:47,564 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:47,702 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:48,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:48,410 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 03:45:49,036 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:49,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118690902] [2022-02-24 03:45:49,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2118690902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:49,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:49,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 03:45:49,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958615275] [2022-02-24 03:45:49,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:49,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 03:45:49,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 03:45:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2079, Invalid=3621, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:45:49,038 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 73 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 72 states have internal predecessors, (111), 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 03:45:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:51,396 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2022-02-24 03:45:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 03:45:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 72 states have internal predecessors, (111), 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 115 [2022-02-24 03:45:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:51,397 INFO L225 Difference]: With dead ends: 275 [2022-02-24 03:45:51,397 INFO L226 Difference]: Without dead ends: 177 [2022-02-24 03:45:51,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6402 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6002, Invalid=15168, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 03:45:51,398 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:51,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 29 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:45:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-24 03:45:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-02-24 03:45:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 172 states have internal predecessors, (177), 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 03:45:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-02-24 03:45:51,414 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 115 [2022-02-24 03:45:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:51,416 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-02-24 03:45:51,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 72 states have internal predecessors, (111), 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 03:45:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-02-24 03:45:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-24 03:45:51,416 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:51,416 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:51,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:45:51,417 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1292036617, now seen corresponding path program 32 times [2022-02-24 03:45:51,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:51,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934315898] [2022-02-24 03:45:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:51,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:51,524 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:51,673 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:52,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:52,377 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 03:45:53,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:53,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934315898] [2022-02-24 03:45:53,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [934315898] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:53,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:53,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 03:45:53,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432859033] [2022-02-24 03:45:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:53,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 03:45:53,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 03:45:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2157, Invalid=3849, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:45:53,262 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 75 states, 75 states have (on average 1.52) internal successors, (114), 74 states have internal predecessors, (114), 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 03:45:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:55,569 INFO L93 Difference]: Finished difference Result 279 states and 289 transitions. [2022-02-24 03:45:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 03:45:55,569 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 74 states have internal predecessors, (114), 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 118 [2022-02-24 03:45:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:55,570 INFO L225 Difference]: With dead ends: 279 [2022-02-24 03:45:55,570 INFO L226 Difference]: Without dead ends: 180 [2022-02-24 03:45:55,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6760 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6300, Invalid=16050, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 03:45:55,572 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 244 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:55,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 24 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:45:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-24 03:45:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-02-24 03:45:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 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 03:45:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-02-24 03:45:55,585 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 118 [2022-02-24 03:45:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:55,585 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-02-24 03:45:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 74 states have internal predecessors, (114), 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 03:45:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-02-24 03:45:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-24 03:45:55,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:55,586 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:55,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:45:55,587 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash 526745429, now seen corresponding path program 33 times [2022-02-24 03:45:55,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:55,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650531193] [2022-02-24 03:45:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:55,702 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:55,805 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:56,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:56,650 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 03:45:57,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:57,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650531193] [2022-02-24 03:45:57,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [650531193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:57,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:57,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 03:45:57,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153399909] [2022-02-24 03:45:57,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:57,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 03:45:57,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 03:45:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2272, Invalid=4048, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:45:57,396 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 77 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 76 states have internal predecessors, (117), 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 03:46:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:00,205 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2022-02-24 03:46:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 03:46:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 76 states have internal predecessors, (117), 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 121 [2022-02-24 03:46:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:00,206 INFO L225 Difference]: With dead ends: 283 [2022-02-24 03:46:00,206 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 03:46:00,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7133 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6641, Invalid=16921, Unknown=0, NotChecked=0, Total=23562 [2022-02-24 03:46:00,208 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 251 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:00,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 39 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 3103 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:46:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 03:46:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-02-24 03:46:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0280898876404494) internal successors, (183), 178 states have internal predecessors, (183), 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 03:46:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 187 transitions. [2022-02-24 03:46:00,223 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 187 transitions. Word has length 121 [2022-02-24 03:46:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:00,224 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 187 transitions. [2022-02-24 03:46:00,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 76 states have internal predecessors, (117), 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 03:46:00,225 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 187 transitions. [2022-02-24 03:46:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 03:46:00,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:00,226 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:00,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:46:00,226 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash 369416179, now seen corresponding path program 34 times [2022-02-24 03:46:00,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:00,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237989387] [2022-02-24 03:46:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:00,337 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:00,401 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:01,177 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 03:46:02,022 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:02,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237989387] [2022-02-24 03:46:02,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1237989387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:02,022 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:02,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 03:46:02,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736482117] [2022-02-24 03:46:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:02,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 03:46:02,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 03:46:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2427, Invalid=4215, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:46:02,023 INFO L87 Difference]: Start difference. First operand 183 states and 187 transitions. Second operand has 79 states, 79 states have (on average 1.518987341772152) internal successors, (120), 78 states have internal predecessors, (120), 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 03:46:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:05,158 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2022-02-24 03:46:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 03:46:05,158 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.518987341772152) internal successors, (120), 78 states have internal predecessors, (120), 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 124 [2022-02-24 03:46:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:05,159 INFO L225 Difference]: With dead ends: 287 [2022-02-24 03:46:05,159 INFO L226 Difference]: Without dead ends: 186 [2022-02-24 03:46:05,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7521 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7028, Invalid=17778, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 03:46:05,161 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:05,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 34 Invalid, 3478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 3229 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:46:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-24 03:46:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-02-24 03:46:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 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 03:46:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-02-24 03:46:05,202 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 124 [2022-02-24 03:46:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:05,202 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-02-24 03:46:05,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.518987341772152) internal successors, (120), 78 states have internal predecessors, (120), 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 03:46:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-02-24 03:46:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-24 03:46:05,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:05,212 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:05,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:46:05,212 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:05,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:05,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1554317717, now seen corresponding path program 35 times [2022-02-24 03:46:05,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:05,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392472827] [2022-02-24 03:46:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:05,320 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:05,473 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:06,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:06,041 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 03:46:06,753 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:06,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392472827] [2022-02-24 03:46:06,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [392472827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:06,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:06,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 03:46:06,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183839952] [2022-02-24 03:46:06,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:06,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 03:46:06,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:06,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 03:46:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2511, Invalid=4461, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:46:06,756 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 81 states, 81 states have (on average 1.5185185185185186) internal successors, (123), 80 states have internal predecessors, (123), 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 03:46:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:09,146 INFO L93 Difference]: Finished difference Result 291 states and 301 transitions. [2022-02-24 03:46:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 03:46:09,146 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.5185185185185186) internal successors, (123), 80 states have internal predecessors, (123), 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 127 [2022-02-24 03:46:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:09,149 INFO L225 Difference]: With dead ends: 291 [2022-02-24 03:46:09,149 INFO L226 Difference]: Without dead ends: 189 [2022-02-24 03:46:09,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7909 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7350, Invalid=18732, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:46:09,152 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 308 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3404 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 3742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 3404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:09,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 24 Invalid, 3742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 3404 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:46:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-24 03:46:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-24 03:46:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0271739130434783) internal successors, (189), 184 states have internal predecessors, (189), 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 03:46:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-02-24 03:46:09,170 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 127 [2022-02-24 03:46:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:09,170 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-02-24 03:46:09,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.5185185185185186) internal successors, (123), 80 states have internal predecessors, (123), 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 03:46:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-02-24 03:46:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-24 03:46:09,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:09,171 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:09,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:46:09,171 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash -850758691, now seen corresponding path program 36 times [2022-02-24 03:46:09,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:09,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924705470] [2022-02-24 03:46:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:09,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:09,281 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:09,421 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:10,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:10,216 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 03:46:11,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:11,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924705470] [2022-02-24 03:46:11,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924705470] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:11,129 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:11,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 03:46:11,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758001047] [2022-02-24 03:46:11,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:11,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 03:46:11,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:11,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 03:46:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2674, Invalid=4636, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:46:11,132 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 82 states have internal predecessors, (126), 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 03:46:13,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:13,882 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2022-02-24 03:46:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 03:46:13,883 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 82 states have internal predecessors, (126), 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 130 [2022-02-24 03:46:13,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:13,883 INFO L225 Difference]: With dead ends: 295 [2022-02-24 03:46:13,883 INFO L226 Difference]: Without dead ends: 192 [2022-02-24 03:46:13,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8317 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7757, Invalid=19633, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 03:46:13,885 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3584 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 3584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:13,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 44 Invalid, 3889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 3584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:46:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-24 03:46:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-02-24 03:46:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 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 03:46:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-02-24 03:46:13,917 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 130 [2022-02-24 03:46:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:13,917 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-02-24 03:46:13,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 82 states have internal predecessors, (126), 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 03:46:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-02-24 03:46:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-24 03:46:13,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:13,918 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:13,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:46:13,918 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:13,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash -504381567, now seen corresponding path program 37 times [2022-02-24 03:46:13,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:13,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357593764] [2022-02-24 03:46:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:13,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:14,052 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:14,131 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:15,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:15,009 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 03:46:15,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:15,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357593764] [2022-02-24 03:46:15,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [357593764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:15,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:15,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 03:46:15,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701301577] [2022-02-24 03:46:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:15,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 03:46:15,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 03:46:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2802, Invalid=4854, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 03:46:15,951 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 85 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 84 states have internal predecessors, (129), 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 03:46:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:18,981 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2022-02-24 03:46:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 03:46:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 84 states have internal predecessors, (129), 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 133 [2022-02-24 03:46:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:18,986 INFO L225 Difference]: With dead ends: 299 [2022-02-24 03:46:18,986 INFO L226 Difference]: Without dead ends: 195 [2022-02-24 03:46:18,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8730 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8135, Invalid=20595, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 03:46:18,989 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 497 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3756 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 4294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 3756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:18,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 34 Invalid, 4294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 3756 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:46:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-24 03:46:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-02-24 03:46:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0263157894736843) internal successors, (195), 190 states have internal predecessors, (195), 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 03:46:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2022-02-24 03:46:19,005 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 133 [2022-02-24 03:46:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:19,005 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2022-02-24 03:46:19,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 84 states have internal predecessors, (129), 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 03:46:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2022-02-24 03:46:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-02-24 03:46:19,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:19,006 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:19,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:46:19,006 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:19,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash -534913593, now seen corresponding path program 38 times [2022-02-24 03:46:19,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:19,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219003004] [2022-02-24 03:46:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:19,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:19,153 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:19,258 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:20,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:20,037 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 03:46:20,867 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:20,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219003004] [2022-02-24 03:46:20,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [219003004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:20,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:20,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 03:46:20,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067935354] [2022-02-24 03:46:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:20,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 03:46:20,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 03:46:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2892, Invalid=5118, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:46:20,871 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand has 87 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 86 states have internal predecessors, (132), 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 03:46:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:24,268 INFO L93 Difference]: Finished difference Result 303 states and 313 transitions. [2022-02-24 03:46:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 03:46:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 86 states have internal predecessors, (132), 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 136 [2022-02-24 03:46:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:24,269 INFO L225 Difference]: With dead ends: 303 [2022-02-24 03:46:24,269 INFO L226 Difference]: Without dead ends: 198 [2022-02-24 03:46:24,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9148 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8481, Invalid=21621, Unknown=0, NotChecked=0, Total=30102 [2022-02-24 03:46:24,271 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 235 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3943 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 3943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:24,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 44 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 3943 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:46:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-24 03:46:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-02-24 03:46:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 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 03:46:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-02-24 03:46:24,286 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 136 [2022-02-24 03:46:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:24,286 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-02-24 03:46:24,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 86 states have internal predecessors, (132), 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 03:46:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-02-24 03:46:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-24 03:46:24,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:24,287 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:24,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:46:24,287 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2088346263, now seen corresponding path program 39 times [2022-02-24 03:46:24,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:24,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321007981] [2022-02-24 03:46:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:24,370 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:24,474 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:25,014 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 03:46:25,772 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:25,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321007981] [2022-02-24 03:46:25,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1321007981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:25,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:25,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-24 03:46:25,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181915465] [2022-02-24 03:46:25,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:25,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-24 03:46:25,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-24 03:46:25,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2927, Invalid=4905, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 03:46:25,787 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 89 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 88 states have internal predecessors, (135), 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 03:46:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:29,083 INFO L93 Difference]: Finished difference Result 335 states and 373 transitions. [2022-02-24 03:46:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 03:46:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 88 states have internal predecessors, (135), 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 139 [2022-02-24 03:46:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:29,084 INFO L225 Difference]: With dead ends: 335 [2022-02-24 03:46:29,084 INFO L226 Difference]: Without dead ends: 229 [2022-02-24 03:46:29,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9233 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8775, Invalid=21675, Unknown=0, NotChecked=0, Total=30450 [2022-02-24 03:46:29,087 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 191 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3907 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 4109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:29,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 74 Invalid, 4109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3907 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:46:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-24 03:46:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 145. [2022-02-24 03:46:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 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 03:46:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-02-24 03:46:29,114 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 139 [2022-02-24 03:46:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:29,115 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-02-24 03:46:29,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 88 states have internal predecessors, (135), 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 03:46:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-02-24 03:46:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-24 03:46:29,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:29,115 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:29,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:46:29,116 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash -365884810, now seen corresponding path program 40 times [2022-02-24 03:46:29,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:29,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749174910] [2022-02-24 03:46:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:29,220 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:29,366 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:30,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:30,432 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 03:46:31,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:31,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749174910] [2022-02-24 03:46:31,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749174910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:31,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:31,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-24 03:46:31,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182823054] [2022-02-24 03:46:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-24 03:46:31,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-24 03:46:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3208, Invalid=5722, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 03:46:31,598 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 92 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 91 states have internal predecessors, (140), 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 03:46:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:35,124 INFO L93 Difference]: Finished difference Result 373 states and 384 transitions. [2022-02-24 03:46:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 03:46:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 91 states have internal predecessors, (140), 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 144 [2022-02-24 03:46:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:35,126 INFO L225 Difference]: With dead ends: 373 [2022-02-24 03:46:35,126 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 03:46:35,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10244 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9419, Invalid=24253, Unknown=0, NotChecked=0, Total=33672 [2022-02-24 03:46:35,128 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 299 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4473 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 4473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:35,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 49 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 4473 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:46:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 03:46:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-02-24 03:46:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0216450216450217) internal successors, (236), 231 states have internal predecessors, (236), 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 03:46:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2022-02-24 03:46:35,158 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 144 [2022-02-24 03:46:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:35,159 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2022-02-24 03:46:35,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.5217391304347827) internal successors, (140), 91 states have internal predecessors, (140), 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 03:46:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2022-02-24 03:46:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-02-24 03:46:35,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:35,159 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:35,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:46:35,160 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1807761208, now seen corresponding path program 41 times [2022-02-24 03:46:35,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:35,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061813863] [2022-02-24 03:46:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:35,272 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:35,366 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:36,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:37,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:37,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061813863] [2022-02-24 03:46:37,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1061813863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:37,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:37,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-24 03:46:37,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184538976] [2022-02-24 03:46:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:37,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-24 03:46:37,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-24 03:46:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3348, Invalid=5964, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 03:46:37,283 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand has 94 states, 94 states have (on average 1.5212765957446808) internal successors, (143), 93 states have internal predecessors, (143), 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 03:46:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:40,919 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2022-02-24 03:46:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 03:46:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.5212765957446808) internal successors, (143), 93 states have internal predecessors, (143), 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 147 [2022-02-24 03:46:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:40,920 INFO L225 Difference]: With dead ends: 377 [2022-02-24 03:46:40,920 INFO L226 Difference]: Without dead ends: 239 [2022-02-24 03:46:40,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10702 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9835, Invalid=25321, Unknown=0, NotChecked=0, Total=35156 [2022-02-24 03:46:40,923 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4668 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 4966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:40,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 54 Invalid, 4966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4668 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:46:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-24 03:46:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-02-24 03:46:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0213675213675213) internal successors, (239), 234 states have internal predecessors, (239), 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 03:46:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 243 transitions. [2022-02-24 03:46:40,948 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 243 transitions. Word has length 147 [2022-02-24 03:46:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 243 transitions. [2022-02-24 03:46:40,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.5212765957446808) internal successors, (143), 93 states have internal predecessors, (143), 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 03:46:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 243 transitions. [2022-02-24 03:46:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-24 03:46:40,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:40,949 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:40,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:46:40,949 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1610287264, now seen corresponding path program 42 times [2022-02-24 03:46:40,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:40,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360453973] [2022-02-24 03:46:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:41,095 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:41,225 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:42,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:42,397 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 03:46:43,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:43,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360453973] [2022-02-24 03:46:43,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [360453973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:43,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:43,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 03:46:43,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110615062] [2022-02-24 03:46:43,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:43,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 03:46:43,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 03:46:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3536, Invalid=6166, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:46:43,784 INFO L87 Difference]: Start difference. First operand 239 states and 243 transitions. Second operand has 96 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 95 states have internal predecessors, (146), 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 03:46:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:47,781 INFO L93 Difference]: Finished difference Result 381 states and 391 transitions. [2022-02-24 03:46:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 03:46:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 95 states have internal predecessors, (146), 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 150 [2022-02-24 03:46:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:47,789 INFO L225 Difference]: With dead ends: 381 [2022-02-24 03:46:47,789 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 03:46:47,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11176 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10305, Invalid=26367, Unknown=0, NotChecked=0, Total=36672 [2022-02-24 03:46:47,793 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 262 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4851 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 4851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:47,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 44 Invalid, 5154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 4851 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:46:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 03:46:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-02-24 03:46:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.021097046413502) internal successors, (242), 237 states have internal predecessors, (242), 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 03:46:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 246 transitions. [2022-02-24 03:46:47,834 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 246 transitions. Word has length 150 [2022-02-24 03:46:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:47,834 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 246 transitions. [2022-02-24 03:46:47,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 95 states have internal predecessors, (146), 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 03:46:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 246 transitions. [2022-02-24 03:46:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-02-24 03:46:47,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:47,835 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:47,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:46:47,835 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2039543906, now seen corresponding path program 43 times [2022-02-24 03:46:47,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:47,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240271445] [2022-02-24 03:46:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:47,935 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:48,071 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:48,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:48,989 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 03:46:50,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:50,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240271445] [2022-02-24 03:46:50,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240271445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:50,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:50,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 03:46:50,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627655382] [2022-02-24 03:46:50,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:50,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 03:46:50,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 03:46:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3627, Invalid=6075, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:46:50,341 INFO L87 Difference]: Start difference. First operand 242 states and 246 transitions. Second operand has 99 states, 99 states have (on average 1.505050505050505) internal successors, (149), 98 states have internal predecessors, (149), 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 03:46:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:54,535 INFO L93 Difference]: Finished difference Result 394 states and 413 transitions. [2022-02-24 03:46:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 03:46:54,536 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.505050505050505) internal successors, (149), 98 states have internal predecessors, (149), 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 153 [2022-02-24 03:46:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:54,536 INFO L225 Difference]: With dead ends: 394 [2022-02-24 03:46:54,536 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 03:46:54,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11508 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10875, Invalid=26955, Unknown=0, NotChecked=0, Total=37830 [2022-02-24 03:46:54,540 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:54,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 34 Invalid, 5063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:46:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 03:46:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 160. [2022-02-24 03:46:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 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 03:46:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-02-24 03:46:54,555 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 153 [2022-02-24 03:46:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:54,555 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-02-24 03:46:54,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.505050505050505) internal successors, (149), 98 states have internal predecessors, (149), 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 03:46:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-02-24 03:46:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-02-24 03:46:54,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:54,556 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:54,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:46:54,556 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1080442996, now seen corresponding path program 44 times [2022-02-24 03:46:54,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:54,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970359256] [2022-02-24 03:46:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:54,681 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:54,789 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:55,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:55,814 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 03:46:56,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:56,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970359256] [2022-02-24 03:46:56,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [970359256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:56,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:56,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 03:46:56,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238285829] [2022-02-24 03:46:56,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:56,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 03:46:56,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 03:46:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3986, Invalid=6934, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:46:56,901 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 102 states, 102 states have (on average 1.5196078431372548) internal successors, (155), 101 states have internal predecessors, (155), 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 03:47:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:00,733 INFO L93 Difference]: Finished difference Result 413 states and 424 transitions. [2022-02-24 03:47:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 03:47:00,733 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.5196078431372548) internal successors, (155), 101 states have internal predecessors, (155), 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 159 [2022-02-24 03:47:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:00,734 INFO L225 Difference]: With dead ends: 413 [2022-02-24 03:47:00,734 INFO L226 Difference]: Without dead ends: 261 [2022-02-24 03:47:00,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12640 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11637, Invalid=29775, Unknown=0, NotChecked=0, Total=41412 [2022-02-24 03:47:00,737 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 223 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5459 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 5728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 5459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:00,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 49 Invalid, 5728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 5459 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:47:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-24 03:47:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-02-24 03:47:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.01953125) internal successors, (261), 256 states have internal predecessors, (261), 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 03:47:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2022-02-24 03:47:00,765 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 159 [2022-02-24 03:47:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:00,765 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2022-02-24 03:47:00,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.5196078431372548) internal successors, (155), 101 states have internal predecessors, (155), 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 03:47:00,766 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2022-02-24 03:47:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-02-24 03:47:00,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:00,766 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:00,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:47:00,767 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1795678476, now seen corresponding path program 45 times [2022-02-24 03:47:00,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:00,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879216040] [2022-02-24 03:47:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:00,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:00,866 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:00,929 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:02,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:02,304 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 03:47:03,855 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:03,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879216040] [2022-02-24 03:47:03,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [879216040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:03,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:03,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-24 03:47:03,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329599417] [2022-02-24 03:47:03,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:03,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-24 03:47:03,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-24 03:47:03,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4142, Invalid=7200, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 03:47:03,862 INFO L87 Difference]: Start difference. First operand 261 states and 265 transitions. Second operand has 104 states, 104 states have (on average 1.5192307692307692) internal successors, (158), 103 states have internal predecessors, (158), 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 03:47:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:08,763 INFO L93 Difference]: Finished difference Result 417 states and 427 transitions. [2022-02-24 03:47:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-24 03:47:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.5192307692307692) internal successors, (158), 103 states have internal predecessors, (158), 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 162 [2022-02-24 03:47:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:08,764 INFO L225 Difference]: With dead ends: 417 [2022-02-24 03:47:08,764 INFO L226 Difference]: Without dead ends: 264 [2022-02-24 03:47:08,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13148 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=12099, Invalid=30957, Unknown=0, NotChecked=0, Total=43056 [2022-02-24 03:47:08,766 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 227 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5685 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 5685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:08,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 44 Invalid, 5956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 5685 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:47:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-24 03:47:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-02-24 03:47:08,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0193050193050193) internal successors, (264), 259 states have internal predecessors, (264), 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 03:47:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2022-02-24 03:47:08,795 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 162 [2022-02-24 03:47:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:08,795 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2022-02-24 03:47:08,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.5192307692307692) internal successors, (158), 103 states have internal predecessors, (158), 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 03:47:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2022-02-24 03:47:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-02-24 03:47:08,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:08,796 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:08,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:47:08,796 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:08,796 INFO L85 PathProgramCache]: Analyzing trace with hash 416762698, now seen corresponding path program 46 times [2022-02-24 03:47:08,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:08,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022085701] [2022-02-24 03:47:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:08,884 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:08,999 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:10,147 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 03:47:11,480 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:11,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022085701] [2022-02-24 03:47:11,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022085701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:11,480 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:11,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 03:47:11,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011905047] [2022-02-24 03:47:11,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:11,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 03:47:11,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 03:47:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4241, Invalid=7101, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 03:47:11,483 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand has 107 states, 107 states have (on average 1.5046728971962617) internal successors, (161), 106 states have internal predecessors, (161), 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 03:47:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:16,002 INFO L93 Difference]: Finished difference Result 428 states and 445 transitions. [2022-02-24 03:47:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 03:47:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.5046728971962617) internal successors, (161), 106 states have internal predecessors, (161), 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 165 [2022-02-24 03:47:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:16,004 INFO L225 Difference]: With dead ends: 428 [2022-02-24 03:47:16,004 INFO L226 Difference]: Without dead ends: 274 [2022-02-24 03:47:16,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13508 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12717, Invalid=31593, Unknown=0, NotChecked=0, Total=44310 [2022-02-24 03:47:16,006 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 227 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5633 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 5633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:16,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 34 Invalid, 5970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 5633 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:47:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-24 03:47:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 172. [2022-02-24 03:47:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 167 states have internal predecessors, (171), 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 03:47:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-02-24 03:47:16,024 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 165 [2022-02-24 03:47:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:16,024 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-02-24 03:47:16,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.5046728971962617) internal successors, (161), 106 states have internal predecessors, (161), 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 03:47:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-02-24 03:47:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-02-24 03:47:16,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:16,025 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:16,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:47:16,025 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 322177056, now seen corresponding path program 47 times [2022-02-24 03:47:16,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:16,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867096352] [2022-02-24 03:47:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:16,216 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:16,356 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:17,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:17,628 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 03:47:19,085 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:19,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867096352] [2022-02-24 03:47:19,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867096352] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:19,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:19,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-24 03:47:19,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706644288] [2022-02-24 03:47:19,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:19,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-24 03:47:19,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-24 03:47:19,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4576, Invalid=8080, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 03:47:19,088 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 110 states, 110 states have (on average 1.518181818181818) internal successors, (167), 109 states have internal predecessors, (167), 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 03:47:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:24,145 INFO L93 Difference]: Finished difference Result 445 states and 456 transitions. [2022-02-24 03:47:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-24 03:47:24,146 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.518181818181818) internal successors, (167), 109 states have internal predecessors, (167), 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 171 [2022-02-24 03:47:24,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:24,147 INFO L225 Difference]: With dead ends: 445 [2022-02-24 03:47:24,147 INFO L226 Difference]: Without dead ends: 281 [2022-02-24 03:47:24,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14726 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13487, Invalid=34693, Unknown=0, NotChecked=0, Total=48180 [2022-02-24 03:47:24,149 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 297 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6321 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 6321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:24,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 44 Invalid, 6668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 6321 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:47:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-24 03:47:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-02-24 03:47:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 276 states have internal predecessors, (281), 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 03:47:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2022-02-24 03:47:24,230 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 171 [2022-02-24 03:47:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:24,230 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2022-02-24 03:47:24,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.518181818181818) internal successors, (167), 109 states have internal predecessors, (167), 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 03:47:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2022-02-24 03:47:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-02-24 03:47:24,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:24,231 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:24,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:47:24,231 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:24,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1186321080, now seen corresponding path program 48 times [2022-02-24 03:47:24,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:24,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156338556] [2022-02-24 03:47:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:24,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:24,355 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:24,457 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:25,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:25,798 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 03:47:27,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:27,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156338556] [2022-02-24 03:47:27,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [156338556] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:27,035 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:27,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-24 03:47:27,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422819620] [2022-02-24 03:47:27,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:27,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-24 03:47:27,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:27,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-24 03:47:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4743, Invalid=8367, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 03:47:27,038 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 112 states, 112 states have (on average 1.5178571428571428) internal successors, (170), 111 states have internal predecessors, (170), 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 03:47:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:31,797 INFO L93 Difference]: Finished difference Result 449 states and 459 transitions. [2022-02-24 03:47:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-24 03:47:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.5178571428571428) internal successors, (170), 111 states have internal predecessors, (170), 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 174 [2022-02-24 03:47:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:31,798 INFO L225 Difference]: With dead ends: 449 [2022-02-24 03:47:31,798 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 03:47:31,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15274 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13984, Invalid=35968, Unknown=0, NotChecked=0, Total=49952 [2022-02-24 03:47:31,801 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6529 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 6822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 6529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:31,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 39 Invalid, 6822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 6529 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:47:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 03:47:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-02-24 03:47:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.017921146953405) internal successors, (284), 279 states have internal predecessors, (284), 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 03:47:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2022-02-24 03:47:31,835 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 174 [2022-02-24 03:47:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:31,835 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2022-02-24 03:47:31,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.5178571428571428) internal successors, (170), 111 states have internal predecessors, (170), 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 03:47:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2022-02-24 03:47:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-02-24 03:47:31,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:31,836 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:31,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:47:31,836 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:31,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2052172042, now seen corresponding path program 49 times [2022-02-24 03:47:31,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:31,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91510215] [2022-02-24 03:47:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:31,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:32,009 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:32,156 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:33,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:33,683 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 03:47:35,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:35,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91510215] [2022-02-24 03:47:35,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [91510215] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:35,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:35,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-24 03:47:35,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954570641] [2022-02-24 03:47:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:35,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-24 03:47:35,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-24 03:47:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4913, Invalid=8659, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:47:35,561 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand has 114 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 113 states have internal predecessors, (173), 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 03:47:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:41,365 INFO L93 Difference]: Finished difference Result 453 states and 463 transitions. [2022-02-24 03:47:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-24 03:47:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 113 states have internal predecessors, (173), 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 177 [2022-02-24 03:47:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:41,366 INFO L225 Difference]: With dead ends: 453 [2022-02-24 03:47:41,366 INFO L226 Difference]: Without dead ends: 287 [2022-02-24 03:47:41,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15832 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=14490, Invalid=37266, Unknown=0, NotChecked=0, Total=51756 [2022-02-24 03:47:41,369 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 427 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6788 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 6788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:41,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 44 Invalid, 7264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 6788 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:47:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-24 03:47:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-02-24 03:47:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0177304964539007) internal successors, (287), 282 states have internal predecessors, (287), 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 03:47:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 291 transitions. [2022-02-24 03:47:41,403 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 291 transitions. Word has length 177 [2022-02-24 03:47:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:41,403 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 291 transitions. [2022-02-24 03:47:41,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.5175438596491229) internal successors, (173), 113 states have internal predecessors, (173), 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 03:47:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 291 transitions. [2022-02-24 03:47:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-02-24 03:47:41,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:41,404 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:41,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:47:41,404 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash -886152846, now seen corresponding path program 50 times [2022-02-24 03:47:41,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:41,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007046768] [2022-02-24 03:47:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:41,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:41,573 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:41,720 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:43,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:44,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:44,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007046768] [2022-02-24 03:47:44,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2007046768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:44,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:44,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-24 03:47:44,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145792424] [2022-02-24 03:47:44,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:44,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-24 03:47:44,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-24 03:47:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5141, Invalid=8901, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 03:47:44,961 INFO L87 Difference]: Start difference. First operand 287 states and 291 transitions. Second operand has 116 states, 116 states have (on average 1.5172413793103448) internal successors, (176), 115 states have internal predecessors, (176), 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 03:47:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:51,341 INFO L93 Difference]: Finished difference Result 457 states and 467 transitions. [2022-02-24 03:47:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-24 03:47:51,342 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.5172413793103448) internal successors, (176), 115 states have internal predecessors, (176), 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 180 [2022-02-24 03:47:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:51,342 INFO L225 Difference]: With dead ends: 457 [2022-02-24 03:47:51,342 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 03:47:51,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16406 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=15060, Invalid=38532, Unknown=0, NotChecked=0, Total=53592 [2022-02-24 03:47:51,345 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 370 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7022 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 7022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:51,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 39 Invalid, 7447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 7022 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:47:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 03:47:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-02-24 03:47:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.0175438596491229) internal successors, (290), 285 states have internal predecessors, (290), 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 03:47:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 294 transitions. [2022-02-24 03:47:51,377 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 294 transitions. Word has length 180 [2022-02-24 03:47:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:51,377 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 294 transitions. [2022-02-24 03:47:51,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.5172413793103448) internal successors, (176), 115 states have internal predecessors, (176), 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 03:47:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 294 transitions. [2022-02-24 03:47:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-02-24 03:47:51,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:51,378 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:51,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:47:51,378 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:51,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1086842932, now seen corresponding path program 51 times [2022-02-24 03:47:51,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:51,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648318543] [2022-02-24 03:47:51,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:51,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:51,567 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:51,740 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:53,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:53,281 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 03:47:54,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:54,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648318543] [2022-02-24 03:47:54,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1648318543] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:54,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:54,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-24 03:47:54,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007239172] [2022-02-24 03:47:54,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:54,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-24 03:47:54,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-24 03:47:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5262, Invalid=9258, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 03:47:54,839 INFO L87 Difference]: Start difference. First operand 290 states and 294 transitions. Second operand has 118 states, 118 states have (on average 1.5169491525423728) internal successors, (179), 117 states have internal predecessors, (179), 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 03:48:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:01,557 INFO L93 Difference]: Finished difference Result 461 states and 471 transitions. [2022-02-24 03:48:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-24 03:48:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.5169491525423728) internal successors, (179), 117 states have internal predecessors, (179), 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 183 [2022-02-24 03:48:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:01,558 INFO L225 Difference]: With dead ends: 461 [2022-02-24 03:48:01,558 INFO L226 Difference]: Without dead ends: 293 [2022-02-24 03:48:01,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16978 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=15529, Invalid=39931, Unknown=0, NotChecked=0, Total=55460 [2022-02-24 03:48:01,562 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 561 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7257 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 7257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:01,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 24 Invalid, 7873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 7257 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:48:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-24 03:48:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-02-24 03:48:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0173611111111112) internal successors, (293), 288 states have internal predecessors, (293), 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 03:48:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 297 transitions. [2022-02-24 03:48:01,626 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 297 transitions. Word has length 183 [2022-02-24 03:48:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:01,626 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 297 transitions. [2022-02-24 03:48:01,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.5169491525423728) internal successors, (179), 117 states have internal predecessors, (179), 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 03:48:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 297 transitions. [2022-02-24 03:48:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-02-24 03:48:01,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:01,630 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:01,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:48:01,630 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash 694301596, now seen corresponding path program 52 times [2022-02-24 03:48:01,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:01,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268009994] [2022-02-24 03:48:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:01,787 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:01,894 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:03,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:03,351 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 03:48:05,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:05,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268009994] [2022-02-24 03:48:05,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1268009994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:05,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:05,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-24 03:48:05,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026277824] [2022-02-24 03:48:05,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:05,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-24 03:48:05,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-24 03:48:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5441, Invalid=9565, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 03:48:05,265 INFO L87 Difference]: Start difference. First operand 293 states and 297 transitions. Second operand has 120 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 119 states have internal predecessors, (182), 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 03:48:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:11,933 INFO L93 Difference]: Finished difference Result 465 states and 475 transitions. [2022-02-24 03:48:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-24 03:48:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 119 states have internal predecessors, (182), 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 186 [2022-02-24 03:48:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:11,934 INFO L225 Difference]: With dead ends: 465 [2022-02-24 03:48:11,934 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 03:48:11,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17566 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16062, Invalid=41298, Unknown=0, NotChecked=0, Total=57360 [2022-02-24 03:48:11,938 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 322 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 7529 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 7904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 7529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:11,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 54 Invalid, 7904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 7529 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:48:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 03:48:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-02-24 03:48:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.0171821305841924) internal successors, (296), 291 states have internal predecessors, (296), 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 03:48:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 300 transitions. [2022-02-24 03:48:11,971 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 300 transitions. Word has length 186 [2022-02-24 03:48:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:11,971 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 300 transitions. [2022-02-24 03:48:11,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.5166666666666666) internal successors, (182), 119 states have internal predecessors, (182), 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 03:48:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 300 transitions. [2022-02-24 03:48:11,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-02-24 03:48:11,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:11,972 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:11,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:48:11,972 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1383912798, now seen corresponding path program 53 times [2022-02-24 03:48:11,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:11,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283896858] [2022-02-24 03:48:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:11,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:12,074 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:12,243 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:13,852 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 03:48:15,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:15,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283896858] [2022-02-24 03:48:15,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [283896858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:15,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:15,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-02-24 03:48:15,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157097600] [2022-02-24 03:48:15,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:15,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-02-24 03:48:15,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-02-24 03:48:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5623, Invalid=9877, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 03:48:15,765 INFO L87 Difference]: Start difference. First operand 296 states and 300 transitions. Second operand has 122 states, 122 states have (on average 1.5163934426229508) internal successors, (185), 121 states have internal predecessors, (185), 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 03:48:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:22,055 INFO L93 Difference]: Finished difference Result 469 states and 479 transitions. [2022-02-24 03:48:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-02-24 03:48:22,055 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.5163934426229508) internal successors, (185), 121 states have internal predecessors, (185), 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 189 [2022-02-24 03:48:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:22,056 INFO L225 Difference]: With dead ends: 469 [2022-02-24 03:48:22,056 INFO L226 Difference]: Without dead ends: 299 [2022-02-24 03:48:22,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18164 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16604, Invalid=42688, Unknown=0, NotChecked=0, Total=59292 [2022-02-24 03:48:22,059 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 644 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 7746 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 8445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 7746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:22,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 24 Invalid, 8445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 7746 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:48:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-24 03:48:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-02-24 03:48:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0170068027210883) internal successors, (299), 294 states have internal predecessors, (299), 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 03:48:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2022-02-24 03:48:22,097 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 189 [2022-02-24 03:48:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:22,097 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2022-02-24 03:48:22,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.5163934426229508) internal successors, (185), 121 states have internal predecessors, (185), 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 03:48:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2022-02-24 03:48:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-02-24 03:48:22,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:22,110 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:22,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:48:22,110 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:22,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash -661404730, now seen corresponding path program 54 times [2022-02-24 03:48:22,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:22,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83924850] [2022-02-24 03:48:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:22,236 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:22,361 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:23,695 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 03:48:25,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:25,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83924850] [2022-02-24 03:48:25,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [83924850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:25,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:25,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-24 03:48:25,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163625867] [2022-02-24 03:48:25,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:25,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-24 03:48:25,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-24 03:48:25,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5867, Invalid=10135, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 03:48:25,135 INFO L87 Difference]: Start difference. First operand 299 states and 303 transitions. Second operand has 124 states, 124 states have (on average 1.5161290322580645) internal successors, (188), 123 states have internal predecessors, (188), 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 03:48:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:32,541 INFO L93 Difference]: Finished difference Result 473 states and 483 transitions. [2022-02-24 03:48:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-24 03:48:32,541 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.5161290322580645) internal successors, (188), 123 states have internal predecessors, (188), 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 192 [2022-02-24 03:48:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:32,542 INFO L225 Difference]: With dead ends: 473 [2022-02-24 03:48:32,542 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 03:48:32,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18778 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17214, Invalid=44042, Unknown=0, NotChecked=0, Total=61256 [2022-02-24 03:48:32,545 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 461 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 8022 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 8022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:32,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 39 Invalid, 8539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 8022 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:48:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 03:48:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-02-24 03:48:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.0168350168350169) internal successors, (302), 297 states have internal predecessors, (302), 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 03:48:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 306 transitions. [2022-02-24 03:48:32,579 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 306 transitions. Word has length 192 [2022-02-24 03:48:32,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:32,579 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 306 transitions. [2022-02-24 03:48:32,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.5161290322580645) internal successors, (188), 123 states have internal predecessors, (188), 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 03:48:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 306 transitions. [2022-02-24 03:48:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-02-24 03:48:32,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:32,595 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:32,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 03:48:32,595 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2097057928, now seen corresponding path program 55 times [2022-02-24 03:48:32,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:32,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511967175] [2022-02-24 03:48:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:32,702 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:32,808 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:34,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:34,289 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 03:48:36,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:36,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511967175] [2022-02-24 03:48:36,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1511967175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:36,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:36,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-24 03:48:36,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414535597] [2022-02-24 03:48:36,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:36,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-24 03:48:36,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-24 03:48:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6056, Invalid=10456, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 03:48:36,142 INFO L87 Difference]: Start difference. First operand 302 states and 306 transitions. Second operand has 126 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 125 states have internal predecessors, (191), 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 03:48:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:44,143 INFO L93 Difference]: Finished difference Result 477 states and 487 transitions. [2022-02-24 03:48:44,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-24 03:48:44,143 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 125 states have internal predecessors, (191), 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 195 [2022-02-24 03:48:44,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:44,144 INFO L225 Difference]: With dead ends: 477 [2022-02-24 03:48:44,144 INFO L226 Difference]: Without dead ends: 305 [2022-02-24 03:48:44,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19396 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=17775, Invalid=45477, Unknown=0, NotChecked=0, Total=63252 [2022-02-24 03:48:44,159 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 269 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 8255 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 8583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 8255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:44,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 69 Invalid, 8583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 8255 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:48:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-24 03:48:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-02-24 03:48:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0166666666666666) internal successors, (305), 300 states have internal predecessors, (305), 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 03:48:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 309 transitions. [2022-02-24 03:48:44,227 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 309 transitions. Word has length 195 [2022-02-24 03:48:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:44,227 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 309 transitions. [2022-02-24 03:48:44,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.5158730158730158) internal successors, (191), 125 states have internal predecessors, (191), 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 03:48:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 309 transitions. [2022-02-24 03:48:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-02-24 03:48:44,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:44,228 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:44,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 03:48:44,228 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2051984912, now seen corresponding path program 56 times [2022-02-24 03:48:44,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:44,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462111628] [2022-02-24 03:48:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:44,369 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:44,467 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:46,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:46,229 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 03:48:48,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:48,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462111628] [2022-02-24 03:48:48,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [462111628] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:48,083 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:48,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-24 03:48:48,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488032932] [2022-02-24 03:48:48,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:48,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-24 03:48:48,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-24 03:48:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6248, Invalid=10782, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 03:48:48,086 INFO L87 Difference]: Start difference. First operand 305 states and 309 transitions. Second operand has 128 states, 128 states have (on average 1.515625) internal successors, (194), 127 states have internal predecessors, (194), 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 03:48:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:55,516 INFO L93 Difference]: Finished difference Result 481 states and 491 transitions. [2022-02-24 03:48:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-24 03:48:55,516 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.515625) internal successors, (194), 127 states have internal predecessors, (194), 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 198 [2022-02-24 03:48:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:55,517 INFO L225 Difference]: With dead ends: 481 [2022-02-24 03:48:55,517 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 03:48:55,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20024 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=18345, Invalid=46935, Unknown=0, NotChecked=0, Total=65280 [2022-02-24 03:48:55,520 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 341 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8494 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 8494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:55,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 34 Invalid, 8892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 8494 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:48:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 03:48:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-02-24 03:48:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.0165016501650166) internal successors, (308), 303 states have internal predecessors, (308), 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 03:48:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 312 transitions. [2022-02-24 03:48:55,566 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 312 transitions. Word has length 198 [2022-02-24 03:48:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:55,566 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 312 transitions. [2022-02-24 03:48:55,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.515625) internal successors, (194), 127 states have internal predecessors, (194), 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 03:48:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 312 transitions. [2022-02-24 03:48:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-02-24 03:48:55,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:55,567 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:55,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 03:48:55,567 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:55,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:55,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1558496846, now seen corresponding path program 57 times [2022-02-24 03:48:55,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:55,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599676206] [2022-02-24 03:48:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:55,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:55,745 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:55,859 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:57,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:59,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:59,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599676206] [2022-02-24 03:48:59,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [599676206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:59,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:59,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-24 03:48:59,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713624065] [2022-02-24 03:48:59,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:59,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-24 03:48:59,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-24 03:48:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6381, Invalid=11175, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 03:48:59,890 INFO L87 Difference]: Start difference. First operand 308 states and 312 transitions. Second operand has 130 states, 130 states have (on average 1.5153846153846153) internal successors, (197), 129 states have internal predecessors, (197), 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 03:49:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:07,936 INFO L93 Difference]: Finished difference Result 485 states and 495 transitions. [2022-02-24 03:49:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-24 03:49:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.5153846153846153) internal successors, (197), 129 states have internal predecessors, (197), 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 201 [2022-02-24 03:49:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:07,938 INFO L225 Difference]: With dead ends: 485 [2022-02-24 03:49:07,938 INFO L226 Difference]: Without dead ends: 311 [2022-02-24 03:49:07,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20656 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=18862, Invalid=48478, Unknown=0, NotChecked=0, Total=67340 [2022-02-24 03:49:07,942 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 347 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8738 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 8738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:07,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 29 Invalid, 9144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 8738 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 03:49:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-24 03:49:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2022-02-24 03:49:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0163398692810457) internal successors, (311), 306 states have internal predecessors, (311), 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 03:49:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 315 transitions. [2022-02-24 03:49:07,992 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 315 transitions. Word has length 201 [2022-02-24 03:49:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:07,992 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 315 transitions. [2022-02-24 03:49:07,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.5153846153846153) internal successors, (197), 129 states have internal predecessors, (197), 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 03:49:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 315 transitions. [2022-02-24 03:49:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-24 03:49:07,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:07,993 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:07,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 03:49:07,993 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash -538403302, now seen corresponding path program 58 times [2022-02-24 03:49:07,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:07,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354231035] [2022-02-24 03:49:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:07,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:08,172 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:08,325 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:10,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:10,422 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 03:49:12,033 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:12,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354231035] [2022-02-24 03:49:12,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [354231035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:12,033 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:12,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-24 03:49:12,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220443968] [2022-02-24 03:49:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:12,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-24 03:49:12,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:12,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-24 03:49:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6641, Invalid=11449, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 03:49:12,036 INFO L87 Difference]: Start difference. First operand 311 states and 315 transitions. Second operand has 132 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 131 states have internal predecessors, (200), 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 03:49:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:20,446 INFO L93 Difference]: Finished difference Result 489 states and 499 transitions. [2022-02-24 03:49:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-24 03:49:20,447 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 131 states have internal predecessors, (200), 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 204 [2022-02-24 03:49:20,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:20,447 INFO L225 Difference]: With dead ends: 489 [2022-02-24 03:49:20,447 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 03:49:20,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21310 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=19512, Invalid=49920, Unknown=0, NotChecked=0, Total=69432 [2022-02-24 03:49:20,450 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 627 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9067 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 9067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:20,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 39 Invalid, 9754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 9067 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-24 03:49:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 03:49:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-02-24 03:49:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.0161812297734627) internal successors, (314), 309 states have internal predecessors, (314), 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 03:49:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 318 transitions. [2022-02-24 03:49:20,485 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 318 transitions. Word has length 204 [2022-02-24 03:49:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:20,486 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 318 transitions. [2022-02-24 03:49:20,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 131 states have internal predecessors, (200), 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 03:49:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 318 transitions. [2022-02-24 03:49:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-02-24 03:49:20,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:20,487 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:20,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 03:49:20,487 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash -383840476, now seen corresponding path program 59 times [2022-02-24 03:49:20,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:20,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886179224] [2022-02-24 03:49:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:20,607 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:20,686 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:22,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:22,619 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 03:49:24,990 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:24,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886179224] [2022-02-24 03:49:24,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [886179224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:24,990 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:24,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-24 03:49:24,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990278518] [2022-02-24 03:49:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:24,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-24 03:49:24,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-24 03:49:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6842, Invalid=11790, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 03:49:24,993 INFO L87 Difference]: Start difference. First operand 314 states and 318 transitions. Second operand has 134 states, 134 states have (on average 1.5149253731343284) internal successors, (203), 133 states have internal predecessors, (203), 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 03:49:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:34,098 INFO L93 Difference]: Finished difference Result 493 states and 503 transitions. [2022-02-24 03:49:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-24 03:49:34,099 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.5149253731343284) internal successors, (203), 133 states have internal predecessors, (203), 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 207 [2022-02-24 03:49:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:34,100 INFO L225 Difference]: With dead ends: 493 [2022-02-24 03:49:34,100 INFO L226 Difference]: Without dead ends: 317 [2022-02-24 03:49:34,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21968 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=20109, Invalid=51447, Unknown=0, NotChecked=0, Total=71556 [2022-02-24 03:49:34,114 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 563 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9331 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 9958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 9331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:34,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 44 Invalid, 9958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 9331 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:49:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-24 03:49:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-02-24 03:49:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.016025641025641) internal successors, (317), 312 states have internal predecessors, (317), 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 03:49:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 321 transitions. [2022-02-24 03:49:34,171 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 321 transitions. Word has length 207 [2022-02-24 03:49:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:34,171 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 321 transitions. [2022-02-24 03:49:34,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.5149253731343284) internal successors, (203), 133 states have internal predecessors, (203), 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 03:49:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 321 transitions. [2022-02-24 03:49:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-02-24 03:49:34,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:34,172 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:34,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 03:49:34,173 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -223860668, now seen corresponding path program 60 times [2022-02-24 03:49:34,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:34,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449095707] [2022-02-24 03:49:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:34,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:34,353 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:34,519 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:36,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:36,263 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 03:49:38,837 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:38,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449095707] [2022-02-24 03:49:38,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1449095707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:38,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:38,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-02-24 03:49:38,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239139385] [2022-02-24 03:49:38,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:38,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-24 03:49:38,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-24 03:49:38,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6981, Invalid=12201, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 03:49:38,840 INFO L87 Difference]: Start difference. First operand 317 states and 321 transitions. Second operand has 136 states, 136 states have (on average 1.5147058823529411) internal successors, (206), 135 states have internal predecessors, (206), 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 03:49:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:48,485 INFO L93 Difference]: Finished difference Result 497 states and 507 transitions. [2022-02-24 03:49:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-02-24 03:49:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.5147058823529411) internal successors, (206), 135 states have internal predecessors, (206), 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 210 [2022-02-24 03:49:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:48,487 INFO L225 Difference]: With dead ends: 497 [2022-02-24 03:49:48,487 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 03:49:48,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22630 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=20650, Invalid=53062, Unknown=0, NotChecked=0, Total=73712 [2022-02-24 03:49:48,490 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 361 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 9599 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 10022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 9599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:48,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 59 Invalid, 10022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 9599 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-24 03:49:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 03:49:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-02-24 03:49:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.0158730158730158) internal successors, (320), 315 states have internal predecessors, (320), 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 03:49:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 324 transitions. [2022-02-24 03:49:48,526 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 324 transitions. Word has length 210 [2022-02-24 03:49:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:48,526 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 324 transitions. [2022-02-24 03:49:48,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.5147058823529411) internal successors, (206), 135 states have internal predecessors, (206), 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 03:49:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 324 transitions. [2022-02-24 03:49:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-24 03:49:48,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:48,527 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:48,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 03:49:48,527 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash 207759866, now seen corresponding path program 61 times [2022-02-24 03:49:48,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:48,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703830303] [2022-02-24 03:49:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:48,628 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:48,774 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:50,851 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 03:49:53,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:53,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703830303] [2022-02-24 03:49:53,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [703830303] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:53,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:53,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-24 03:49:53,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855688716] [2022-02-24 03:49:53,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:53,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-24 03:49:53,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-24 03:49:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7187, Invalid=12553, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 03:49:53,366 INFO L87 Difference]: Start difference. First operand 320 states and 324 transitions. Second operand has 138 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 137 states have internal predecessors, (209), 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 03:50:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:02,282 INFO L93 Difference]: Finished difference Result 501 states and 511 transitions. [2022-02-24 03:50:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-24 03:50:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 137 states have internal predecessors, (209), 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 213 [2022-02-24 03:50:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:02,284 INFO L225 Difference]: With dead ends: 501 [2022-02-24 03:50:02,284 INFO L226 Difference]: Without dead ends: 323 [2022-02-24 03:50:02,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23308 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=21264, Invalid=54636, Unknown=0, NotChecked=0, Total=75900 [2022-02-24 03:50:02,287 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 366 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9855 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 9855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:02,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 54 Invalid, 10285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 9855 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 03:50:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-24 03:50:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2022-02-24 03:50:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0157232704402517) internal successors, (323), 318 states have internal predecessors, (323), 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 03:50:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 327 transitions. [2022-02-24 03:50:02,327 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 327 transitions. Word has length 213 [2022-02-24 03:50:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:02,327 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 327 transitions. [2022-02-24 03:50:02,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 137 states have internal predecessors, (209), 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 03:50:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 327 transitions. [2022-02-24 03:50:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-02-24 03:50:02,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:02,328 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:02,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 03:50:02,328 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2141057134, now seen corresponding path program 62 times [2022-02-24 03:50:02,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:02,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035821917] [2022-02-24 03:50:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:02,440 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:02,598 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:04,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:04,201 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 03:50:06,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:06,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035821917] [2022-02-24 03:50:06,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035821917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:06,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:06,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-24 03:50:06,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517865310] [2022-02-24 03:50:06,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:06,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-24 03:50:06,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:06,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-24 03:50:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7463, Invalid=12843, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 03:50:06,131 INFO L87 Difference]: Start difference. First operand 323 states and 327 transitions. Second operand has 140 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 139 states have internal predecessors, (212), 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 03:50:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:14,042 INFO L93 Difference]: Finished difference Result 505 states and 515 transitions. [2022-02-24 03:50:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-24 03:50:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 139 states have internal predecessors, (212), 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 216 [2022-02-24 03:50:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:14,044 INFO L225 Difference]: With dead ends: 505 [2022-02-24 03:50:14,044 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 03:50:14,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24002 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=21954, Invalid=56166, Unknown=0, NotChecked=0, Total=78120 [2022-02-24 03:50:14,054 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 299 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10110 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 10473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 10110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:14,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 34 Invalid, 10473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 10110 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-24 03:50:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 03:50:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-02-24 03:50:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.0155763239875388) internal successors, (326), 321 states have internal predecessors, (326), 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 03:50:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 330 transitions. [2022-02-24 03:50:14,112 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 330 transitions. Word has length 216 [2022-02-24 03:50:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:14,112 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 330 transitions. [2022-02-24 03:50:14,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.5142857142857142) internal successors, (212), 139 states have internal predecessors, (212), 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 03:50:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 330 transitions. [2022-02-24 03:50:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-02-24 03:50:14,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:14,124 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:14,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 03:50:14,124 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2011171120, now seen corresponding path program 63 times [2022-02-24 03:50:14,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:14,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793374760] [2022-02-24 03:50:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:14,275 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:14,448 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:16,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:16,721 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 03:50:19,216 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:19,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793374760] [2022-02-24 03:50:19,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [793374760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:19,216 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:19,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-02-24 03:50:19,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900636866] [2022-02-24 03:50:19,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:19,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-24 03:50:19,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-24 03:50:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7676, Invalid=13204, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 03:50:19,220 INFO L87 Difference]: Start difference. First operand 326 states and 330 transitions. Second operand has 142 states, 142 states have (on average 1.5140845070422535) internal successors, (215), 141 states have internal predecessors, (215), 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 03:50:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:28,547 INFO L93 Difference]: Finished difference Result 509 states and 519 transitions. [2022-02-24 03:50:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-02-24 03:50:28,548 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.5140845070422535) internal successors, (215), 141 states have internal predecessors, (215), 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 219 [2022-02-24 03:50:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:28,549 INFO L225 Difference]: With dead ends: 509 [2022-02-24 03:50:28,549 INFO L226 Difference]: Without dead ends: 329 [2022-02-24 03:50:28,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24700 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=22587, Invalid=57785, Unknown=0, NotChecked=0, Total=80372 [2022-02-24 03:50:28,552 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 303 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 10444 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 10809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 10444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:28,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 59 Invalid, 10809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 10444 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:50:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-24 03:50:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-02-24 03:50:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.0154320987654322) internal successors, (329), 324 states have internal predecessors, (329), 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 03:50:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 333 transitions. [2022-02-24 03:50:28,590 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 333 transitions. Word has length 219 [2022-02-24 03:50:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:28,590 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 333 transitions. [2022-02-24 03:50:28,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.5140845070422535) internal successors, (215), 141 states have internal predecessors, (215), 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 03:50:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 333 transitions. [2022-02-24 03:50:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-02-24 03:50:28,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:28,591 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:28,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 03:50:28,591 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1488459416, now seen corresponding path program 64 times [2022-02-24 03:50:28,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:28,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128576755] [2022-02-24 03:50:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:28,710 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:28,894 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:30,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:30,720 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 03:50:33,494 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:33,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128576755] [2022-02-24 03:50:33,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [128576755] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:33,494 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:33,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-02-24 03:50:33,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692680447] [2022-02-24 03:50:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-02-24 03:50:33,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-02-24 03:50:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7823, Invalid=13639, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 03:50:33,496 INFO L87 Difference]: Start difference. First operand 329 states and 333 transitions. Second operand has 144 states, 144 states have (on average 1.5138888888888888) internal successors, (218), 143 states have internal predecessors, (218), 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 03:50:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:43,316 INFO L93 Difference]: Finished difference Result 513 states and 523 transitions. [2022-02-24 03:50:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-02-24 03:50:43,316 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.5138888888888888) internal successors, (218), 143 states have internal predecessors, (218), 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 222 [2022-02-24 03:50:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:43,317 INFO L225 Difference]: With dead ends: 513 [2022-02-24 03:50:43,317 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 03:50:43,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25402 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=23160, Invalid=59496, Unknown=0, NotChecked=0, Total=82656 [2022-02-24 03:50:43,322 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 604 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10727 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 10727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:43,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 29 Invalid, 11397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 10727 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-24 03:50:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 03:50:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-02-24 03:50:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.0152905198776758) internal successors, (332), 327 states have internal predecessors, (332), 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 03:50:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 336 transitions. [2022-02-24 03:50:43,371 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 336 transitions. Word has length 222 [2022-02-24 03:50:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:43,371 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 336 transitions. [2022-02-24 03:50:43,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.5138888888888888) internal successors, (218), 143 states have internal predecessors, (218), 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 03:50:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 336 transitions. [2022-02-24 03:50:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-02-24 03:50:43,372 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:43,372 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:43,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 03:50:43,372 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1601546842, now seen corresponding path program 65 times [2022-02-24 03:50:43,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:43,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327158998] [2022-02-24 03:50:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:43,510 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:43,640 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:46,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:46,145 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 03:50:49,040 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:49,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327158998] [2022-02-24 03:50:49,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1327158998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:49,040 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:49,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-24 03:50:49,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610973505] [2022-02-24 03:50:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:49,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-24 03:50:49,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-24 03:50:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8041, Invalid=14011, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 03:50:49,043 INFO L87 Difference]: Start difference. First operand 332 states and 336 transitions. Second operand has 146 states, 146 states have (on average 1.5136986301369864) internal successors, (221), 145 states have internal predecessors, (221), 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 03:50:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:59,832 INFO L93 Difference]: Finished difference Result 517 states and 527 transitions. [2022-02-24 03:50:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-24 03:50:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.5136986301369864) internal successors, (221), 145 states have internal predecessors, (221), 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 225 [2022-02-24 03:50:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:59,834 INFO L225 Difference]: With dead ends: 517 [2022-02-24 03:50:59,834 INFO L226 Difference]: Without dead ends: 335 [2022-02-24 03:50:59,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26120 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=23810, Invalid=61162, Unknown=0, NotChecked=0, Total=84972 [2022-02-24 03:50:59,837 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 615 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 11016 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 11698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 11016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:59,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 59 Invalid, 11698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 11016 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 03:50:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-24 03:50:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-02-24 03:50:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.0151515151515151) internal successors, (335), 330 states have internal predecessors, (335), 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 03:50:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 339 transitions. [2022-02-24 03:50:59,876 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 339 transitions. Word has length 225 [2022-02-24 03:50:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:59,876 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 339 transitions. [2022-02-24 03:50:59,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.5136986301369864) internal successors, (221), 145 states have internal predecessors, (221), 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 03:50:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 339 transitions. [2022-02-24 03:50:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-02-24 03:50:59,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:59,877 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:59,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 03:50:59,877 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:59,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1171998014, now seen corresponding path program 66 times [2022-02-24 03:50:59,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:59,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366413538] [2022-02-24 03:50:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:59,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:00,049 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:00,162 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:02,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:02,147 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 03:51:03,973 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:03,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366413538] [2022-02-24 03:51:03,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [366413538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:03,973 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:03,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-24 03:51:03,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093036346] [2022-02-24 03:51:03,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:03,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-24 03:51:03,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-24 03:51:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8252, Invalid=13800, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 03:51:03,975 INFO L87 Difference]: Start difference. First operand 335 states and 339 transitions. Second operand has 149 states, 149 states have (on average 1.5033557046979866) internal successors, (224), 148 states have internal predecessors, (224), 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 03:51:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:14,184 INFO L93 Difference]: Finished difference Result 562 states and 613 transitions. [2022-02-24 03:51:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-24 03:51:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.5033557046979866) internal successors, (224), 148 states have internal predecessors, (224), 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 228 [2022-02-24 03:51:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:14,200 INFO L225 Difference]: With dead ends: 562 [2022-02-24 03:51:14,200 INFO L226 Difference]: Without dead ends: 379 [2022-02-24 03:51:14,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26633 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=24750, Invalid=61980, Unknown=0, NotChecked=0, Total=86730 [2022-02-24 03:51:14,216 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 383 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 11038 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 11596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 11038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:14,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 64 Invalid, 11596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 11038 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 03:51:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-24 03:51:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 235. [2022-02-24 03:51:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 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 03:51:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-02-24 03:51:14,243 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 228 [2022-02-24 03:51:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:14,243 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-02-24 03:51:14,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.5033557046979866) internal successors, (224), 148 states have internal predecessors, (224), 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 03:51:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-02-24 03:51:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-02-24 03:51:14,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:14,244 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:14,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 03:51:14,244 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1538130708, now seen corresponding path program 67 times [2022-02-24 03:51:14,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:14,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467161091] [2022-02-24 03:51:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:14,402 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:14,559 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:15,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:15,998 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 03:51:17,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:17,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467161091] [2022-02-24 03:51:17,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1467161091] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:17,943 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:17,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-02-24 03:51:17,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604850028] [2022-02-24 03:51:17,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:17,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-02-24 03:51:17,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-02-24 03:51:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8552, Invalid=14400, Unknown=0, NotChecked=0, Total=22952 [2022-02-24 03:51:17,946 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 152 states, 152 states have (on average 1.513157894736842) internal successors, (230), 151 states have internal predecessors, (230), 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 03:51:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:28,648 INFO L93 Difference]: Finished difference Result 467 states and 478 transitions. [2022-02-24 03:51:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-24 03:51:28,649 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.513157894736842) internal successors, (230), 151 states have internal predecessors, (230), 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 234 [2022-02-24 03:51:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:28,649 INFO L225 Difference]: With dead ends: 467 [2022-02-24 03:51:28,650 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 03:51:28,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27733 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=25650, Invalid=64650, Unknown=0, NotChecked=0, Total=90300 [2022-02-24 03:51:28,654 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 473 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 11571 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 12124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 11571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:28,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 39 Invalid, 12124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 11571 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-24 03:51:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 03:51:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-24 03:51:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 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 03:51:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-02-24 03:51:28,681 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 234 [2022-02-24 03:51:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:28,682 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-02-24 03:51:28,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.513157894736842) internal successors, (230), 151 states have internal predecessors, (230), 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 03:51:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-02-24 03:51:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-24 03:51:28,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:28,682 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:28,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 03:51:28,683 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1967703021, now seen corresponding path program 68 times [2022-02-24 03:51:28,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:28,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864119576] [2022-02-24 03:51:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:28,854 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:28,974 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:31,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:31,017 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 03:51:33,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:33,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864119576] [2022-02-24 03:51:33,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [864119576] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:33,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:33,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-02-24 03:51:33,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747513400] [2022-02-24 03:51:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:33,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-02-24 03:51:33,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-02-24 03:51:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9021, Invalid=15785, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 03:51:33,447 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 155 states, 155 states have (on average 1.5161290322580645) internal successors, (235), 154 states have internal predecessors, (235), 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 03:51:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:42,957 INFO L93 Difference]: Finished difference Result 627 states and 638 transitions. [2022-02-24 03:51:42,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-24 03:51:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.5161290322580645) internal successors, (235), 154 states have internal predecessors, (235), 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 239 [2022-02-24 03:51:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:42,959 INFO L225 Difference]: With dead ends: 627 [2022-02-24 03:51:42,959 INFO L226 Difference]: Without dead ends: 395 [2022-02-24 03:51:42,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29468 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=26732, Invalid=69058, Unknown=0, NotChecked=0, Total=95790 [2022-02-24 03:51:42,963 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 12499 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 12499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:42,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 34 Invalid, 12740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 12499 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:51:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-24 03:51:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-02-24 03:51:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 390 states have (on average 1.0128205128205128) internal successors, (395), 390 states have internal predecessors, (395), 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 03:51:43,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 399 transitions. [2022-02-24 03:51:43,015 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 399 transitions. Word has length 239 [2022-02-24 03:51:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:43,015 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 399 transitions. [2022-02-24 03:51:43,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.5161290322580645) internal successors, (235), 154 states have internal predecessors, (235), 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 03:51:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 399 transitions. [2022-02-24 03:51:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-02-24 03:51:43,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:43,016 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:43,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 03:51:43,017 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:43,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:43,017 INFO L85 PathProgramCache]: Analyzing trace with hash 349026459, now seen corresponding path program 69 times [2022-02-24 03:51:43,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:43,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174014786] [2022-02-24 03:51:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:43,218 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:43,357 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:45,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:45,440 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 03:51:48,472 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:48,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174014786] [2022-02-24 03:51:48,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174014786] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:48,472 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:48,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-02-24 03:51:48,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472204187] [2022-02-24 03:51:48,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:48,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-02-24 03:51:48,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-02-24 03:51:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9255, Invalid=16185, Unknown=0, NotChecked=0, Total=25440 [2022-02-24 03:51:48,476 INFO L87 Difference]: Start difference. First operand 395 states and 399 transitions. Second operand has 157 states, 157 states have (on average 1.515923566878981) internal successors, (238), 156 states have internal predecessors, (238), 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 03:51:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:59,847 INFO L93 Difference]: Finished difference Result 631 states and 641 transitions. [2022-02-24 03:51:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-02-24 03:51:59,847 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.515923566878981) internal successors, (238), 156 states have internal predecessors, (238), 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 242 [2022-02-24 03:51:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:59,848 INFO L225 Difference]: With dead ends: 631 [2022-02-24 03:51:59,848 INFO L226 Difference]: Without dead ends: 398 [2022-02-24 03:51:59,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30241 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=27430, Invalid=70852, Unknown=0, NotChecked=0, Total=98282 [2022-02-24 03:51:59,852 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 660 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12909 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 13642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 12909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:59,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 49 Invalid, 13642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 12909 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:51:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-02-24 03:51:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-02-24 03:51:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.0127226463104326) internal successors, (398), 393 states have internal predecessors, (398), 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 03:51:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 402 transitions. [2022-02-24 03:51:59,904 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 402 transitions. Word has length 242 [2022-02-24 03:51:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:59,904 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 402 transitions. [2022-02-24 03:51:59,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.515923566878981) internal successors, (238), 156 states have internal predecessors, (238), 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 03:51:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 402 transitions. [2022-02-24 03:51:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-02-24 03:51:59,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:59,905 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:59,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 03:51:59,905 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1660520317, now seen corresponding path program 70 times [2022-02-24 03:51:59,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:59,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554366099] [2022-02-24 03:51:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:00,043 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:00,217 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:03,001 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 03:52:06,214 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:06,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554366099] [2022-02-24 03:52:06,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554366099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:06,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:06,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-02-24 03:52:06,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027795424] [2022-02-24 03:52:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:06,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-02-24 03:52:06,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-02-24 03:52:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9492, Invalid=16590, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:52:06,217 INFO L87 Difference]: Start difference. First operand 398 states and 402 transitions. Second operand has 159 states, 159 states have (on average 1.5157232704402517) internal successors, (241), 158 states have internal predecessors, (241), 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 03:52:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:17,228 INFO L93 Difference]: Finished difference Result 635 states and 645 transitions. [2022-02-24 03:52:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-24 03:52:17,229 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.5157232704402517) internal successors, (241), 158 states have internal predecessors, (241), 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 245 [2022-02-24 03:52:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:17,230 INFO L225 Difference]: With dead ends: 635 [2022-02-24 03:52:17,230 INFO L226 Difference]: Without dead ends: 401 [2022-02-24 03:52:17,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31024 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=28137, Invalid=72669, Unknown=0, NotChecked=0, Total=100806 [2022-02-24 03:52:17,247 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 421 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 13220 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 13220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:17,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 39 Invalid, 13713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 13220 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-24 03:52:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-02-24 03:52:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-02-24 03:52:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 396 states have (on average 1.0126262626262625) internal successors, (401), 396 states have internal predecessors, (401), 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 03:52:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 405 transitions. [2022-02-24 03:52:17,315 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 405 transitions. Word has length 245 [2022-02-24 03:52:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:17,315 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 405 transitions. [2022-02-24 03:52:17,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.5157232704402517) internal successors, (241), 158 states have internal predecessors, (241), 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 03:52:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 405 transitions. [2022-02-24 03:52:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-02-24 03:52:17,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:17,316 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:17,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 03:52:17,316 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:17,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1435820283, now seen corresponding path program 71 times [2022-02-24 03:52:17,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:17,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856713373] [2022-02-24 03:52:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:17,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:17,472 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:17,661 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:20,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:20,679 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 03:52:23,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:23,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856713373] [2022-02-24 03:52:23,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856713373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:23,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:23,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-02-24 03:52:23,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585756664] [2022-02-24 03:52:23,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:23,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-02-24 03:52:23,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-02-24 03:52:23,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9809, Invalid=16923, Unknown=0, NotChecked=0, Total=26732 [2022-02-24 03:52:23,904 INFO L87 Difference]: Start difference. First operand 401 states and 405 transitions. Second operand has 161 states, 161 states have (on average 1.515527950310559) internal successors, (244), 160 states have internal predecessors, (244), 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 03:52:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:34,913 INFO L93 Difference]: Finished difference Result 639 states and 649 transitions. [2022-02-24 03:52:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-24 03:52:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.515527950310559) internal successors, (244), 160 states have internal predecessors, (244), 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 248 [2022-02-24 03:52:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:34,914 INFO L225 Difference]: With dead ends: 639 [2022-02-24 03:52:34,915 INFO L226 Difference]: Without dead ends: 404 [2022-02-24 03:52:34,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31824 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=28930, Invalid=74432, Unknown=0, NotChecked=0, Total=103362 [2022-02-24 03:52:34,919 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 343 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13490 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 13907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 13490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:34,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 54 Invalid, 13907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 13490 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:52:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-24 03:52:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2022-02-24 03:52:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 399 states have (on average 1.012531328320802) internal successors, (404), 399 states have internal predecessors, (404), 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 03:52:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 408 transitions. [2022-02-24 03:52:34,982 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 408 transitions. Word has length 248 [2022-02-24 03:52:34,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:34,982 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 408 transitions. [2022-02-24 03:52:34,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.515527950310559) internal successors, (244), 160 states have internal predecessors, (244), 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 03:52:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 408 transitions. [2022-02-24 03:52:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-02-24 03:52:34,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:34,983 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:34,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 03:52:34,983 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:34,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1595838695, now seen corresponding path program 72 times [2022-02-24 03:52:34,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:34,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329971406] [2022-02-24 03:52:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:35,087 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:35,257 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:37,928 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 03:52:40,461 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:40,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329971406] [2022-02-24 03:52:40,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [329971406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:40,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:40,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-02-24 03:52:40,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391387754] [2022-02-24 03:52:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:40,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-02-24 03:52:40,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-02-24 03:52:40,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10053, Invalid=17337, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 03:52:40,464 INFO L87 Difference]: Start difference. First operand 404 states and 408 transitions. Second operand has 163 states, 163 states have (on average 1.5153374233128833) internal successors, (247), 162 states have internal predecessors, (247), 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 03:52:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:52,703 INFO L93 Difference]: Finished difference Result 643 states and 653 transitions. [2022-02-24 03:52:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-24 03:52:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.5153374233128833) internal successors, (247), 162 states have internal predecessors, (247), 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 251 [2022-02-24 03:52:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:52,704 INFO L225 Difference]: With dead ends: 643 [2022-02-24 03:52:52,705 INFO L226 Difference]: Without dead ends: 407 [2022-02-24 03:52:52,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32627 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=29656, Invalid=76294, Unknown=0, NotChecked=0, Total=105950 [2022-02-24 03:52:52,709 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 602 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13815 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 14489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 13815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:52,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 34 Invalid, 14489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 13815 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 03:52:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-02-24 03:52:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-02-24 03:52:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.0124378109452736) internal successors, (407), 402 states have internal predecessors, (407), 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 03:52:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 411 transitions. [2022-02-24 03:52:52,775 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 411 transitions. Word has length 251 [2022-02-24 03:52:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:52,775 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 411 transitions. [2022-02-24 03:52:52,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.5153374233128833) internal successors, (247), 162 states have internal predecessors, (247), 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 03:52:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 411 transitions. [2022-02-24 03:52:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-24 03:52:52,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:52,776 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:52,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 03:52:52,776 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:52,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1516481681, now seen corresponding path program 73 times [2022-02-24 03:52:52,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:52,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473899541] [2022-02-24 03:52:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:52,903 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:53,002 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:55,664 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 03:52:58,281 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:58,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473899541] [2022-02-24 03:52:58,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473899541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:58,282 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:58,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-02-24 03:52:58,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245425441] [2022-02-24 03:52:58,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:58,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-02-24 03:52:58,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-02-24 03:52:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10300, Invalid=17756, Unknown=0, NotChecked=0, Total=28056 [2022-02-24 03:52:58,284 INFO L87 Difference]: Start difference. First operand 407 states and 411 transitions. Second operand has 165 states, 165 states have (on average 1.5151515151515151) internal successors, (250), 164 states have internal predecessors, (250), 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 03:53:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:09,469 INFO L93 Difference]: Finished difference Result 647 states and 657 transitions. [2022-02-24 03:53:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-02-24 03:53:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.5151515151515151) internal successors, (250), 164 states have internal predecessors, (250), 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 254 [2022-02-24 03:53:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:09,471 INFO L225 Difference]: With dead ends: 647 [2022-02-24 03:53:09,471 INFO L226 Difference]: Without dead ends: 410 [2022-02-24 03:53:09,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33440 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=30391, Invalid=78179, Unknown=0, NotChecked=0, Total=108570 [2022-02-24 03:53:09,475 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 351 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14171 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 14598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 14171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:09,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 59 Invalid, 14598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 14171 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-24 03:53:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-24 03:53:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2022-02-24 03:53:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.0123456790123457) internal successors, (410), 405 states have internal predecessors, (410), 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 03:53:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 414 transitions. [2022-02-24 03:53:09,527 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 414 transitions. Word has length 254 [2022-02-24 03:53:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:09,527 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 414 transitions. [2022-02-24 03:53:09,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.5151515151515151) internal successors, (250), 164 states have internal predecessors, (250), 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 03:53:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 414 transitions. [2022-02-24 03:53:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-02-24 03:53:09,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:09,528 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:09,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 03:53:09,528 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1965524911, now seen corresponding path program 74 times [2022-02-24 03:53:09,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:09,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330514884] [2022-02-24 03:53:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:09,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:09,666 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:09,817 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:09,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:14,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:14,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330514884] [2022-02-24 03:53:14,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1330514884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:14,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:14,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-02-24 03:53:14,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347051249] [2022-02-24 03:53:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:14,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-02-24 03:53:14,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:14,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-02-24 03:53:14,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10470, Invalid=18260, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 03:53:14,698 INFO L87 Difference]: Start difference. First operand 410 states and 414 transitions. Second operand has 167 states, 167 states have (on average 1.5149700598802396) internal successors, (253), 166 states have internal predecessors, (253), 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 03:53:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:26,158 INFO L93 Difference]: Finished difference Result 651 states and 661 transitions. [2022-02-24 03:53:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-24 03:53:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.5149700598802396) internal successors, (253), 166 states have internal predecessors, (253), 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 257 [2022-02-24 03:53:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:26,160 INFO L225 Difference]: With dead ends: 651 [2022-02-24 03:53:26,160 INFO L226 Difference]: Without dead ends: 413 [2022-02-24 03:53:26,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34256 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=31055, Invalid=80167, Unknown=0, NotChecked=0, Total=111222 [2022-02-24 03:53:26,164 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 614 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14530 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 14530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:26,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 39 Invalid, 15223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 14530 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 03:53:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-02-24 03:53:26,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2022-02-24 03:53:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 408 states have (on average 1.0122549019607843) internal successors, (413), 408 states have internal predecessors, (413), 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 03:53:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 417 transitions. [2022-02-24 03:53:26,215 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 417 transitions. Word has length 257 [2022-02-24 03:53:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:26,216 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 417 transitions. [2022-02-24 03:53:26,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.5149700598802396) internal successors, (253), 166 states have internal predecessors, (253), 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 03:53:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 417 transitions. [2022-02-24 03:53:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-02-24 03:53:26,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:26,217 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:26,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 03:53:26,217 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash 99841497, now seen corresponding path program 75 times [2022-02-24 03:53:26,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:26,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538103009] [2022-02-24 03:53:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:26,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:26,323 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:26,468 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:29,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:29,455 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 03:53:32,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:32,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538103009] [2022-02-24 03:53:32,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [538103009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:32,403 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:32,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-02-24 03:53:32,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793259238] [2022-02-24 03:53:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:32,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-02-24 03:53:32,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-02-24 03:53:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10803, Invalid=18609, Unknown=0, NotChecked=0, Total=29412 [2022-02-24 03:53:32,406 INFO L87 Difference]: Start difference. First operand 413 states and 417 transitions. Second operand has 169 states, 169 states have (on average 1.514792899408284) internal successors, (256), 168 states have internal predecessors, (256), 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 03:53:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:44,435 INFO L93 Difference]: Finished difference Result 655 states and 665 transitions. [2022-02-24 03:53:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-02-24 03:53:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 1.514792899408284) internal successors, (256), 168 states have internal predecessors, (256), 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 260 [2022-02-24 03:53:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:44,437 INFO L225 Difference]: With dead ends: 655 [2022-02-24 03:53:44,437 INFO L226 Difference]: Without dead ends: 416 [2022-02-24 03:53:44,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35096 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=31888, Invalid=82018, Unknown=0, NotChecked=0, Total=113906 [2022-02-24 03:53:44,440 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 622 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14867 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 14867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:44,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 39 Invalid, 15567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 14867 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 03:53:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-24 03:53:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-02-24 03:53:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.0121654501216546) internal successors, (416), 411 states have internal predecessors, (416), 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 03:53:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 420 transitions. [2022-02-24 03:53:44,492 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 420 transitions. Word has length 260 [2022-02-24 03:53:44,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:44,492 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 420 transitions. [2022-02-24 03:53:44,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 1.514792899408284) internal successors, (256), 168 states have internal predecessors, (256), 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 03:53:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 420 transitions. [2022-02-24 03:53:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-02-24 03:53:44,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:44,493 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:44,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 03:53:44,493 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1075404219, now seen corresponding path program 76 times [2022-02-24 03:53:44,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:44,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503439839] [2022-02-24 03:53:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:44,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:44,668 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:44,862 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:47,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:47,852 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 03:53:50,611 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:50,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503439839] [2022-02-24 03:53:50,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503439839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:50,611 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:50,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-02-24 03:53:50,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140005628] [2022-02-24 03:53:50,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:50,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-24 03:53:50,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-24 03:53:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11059, Invalid=19043, Unknown=0, NotChecked=0, Total=30102 [2022-02-24 03:53:50,614 INFO L87 Difference]: Start difference. First operand 416 states and 420 transitions. Second operand has 171 states, 171 states have (on average 1.5146198830409356) internal successors, (259), 170 states have internal predecessors, (259), 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 03:54:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:02,298 INFO L93 Difference]: Finished difference Result 659 states and 669 transitions. [2022-02-24 03:54:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-24 03:54:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.5146198830409356) internal successors, (259), 170 states have internal predecessors, (259), 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 263 [2022-02-24 03:54:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:02,300 INFO L225 Difference]: With dead ends: 659 [2022-02-24 03:54:02,300 INFO L226 Difference]: Without dead ends: 419 [2022-02-24 03:54:02,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35939 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=32650, Invalid=83972, Unknown=0, NotChecked=0, Total=116622 [2022-02-24 03:54:02,304 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 452 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15212 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 15743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 15212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:02,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 54 Invalid, 15743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 15212 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 03:54:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-24 03:54:02,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2022-02-24 03:54:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 414 states have (on average 1.0120772946859904) internal successors, (419), 414 states have internal predecessors, (419), 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 03:54:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 423 transitions. [2022-02-24 03:54:02,357 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 423 transitions. Word has length 263 [2022-02-24 03:54:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:02,357 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 423 transitions. [2022-02-24 03:54:02,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.5146198830409356) internal successors, (259), 170 states have internal predecessors, (259), 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 03:54:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 423 transitions. [2022-02-24 03:54:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-02-24 03:54:02,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:02,358 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:02,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 03:54:02,358 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash 641902147, now seen corresponding path program 77 times [2022-02-24 03:54:02,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:02,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510132853] [2022-02-24 03:54:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:02,461 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:02,540 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:05,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:05,294 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 03:54:08,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:08,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510132853] [2022-02-24 03:54:08,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510132853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:08,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:08,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-02-24 03:54:08,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156497497] [2022-02-24 03:54:08,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:08,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-02-24 03:54:08,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-02-24 03:54:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11318, Invalid=19482, Unknown=0, NotChecked=0, Total=30800 [2022-02-24 03:54:08,368 INFO L87 Difference]: Start difference. First operand 419 states and 423 transitions. Second operand has 173 states, 173 states have (on average 1.5144508670520231) internal successors, (262), 172 states have internal predecessors, (262), 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 03:54:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:22,551 INFO L93 Difference]: Finished difference Result 663 states and 673 transitions. [2022-02-24 03:54:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-24 03:54:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.5144508670520231) internal successors, (262), 172 states have internal predecessors, (262), 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 266 [2022-02-24 03:54:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:22,553 INFO L225 Difference]: With dead ends: 663 [2022-02-24 03:54:22,553 INFO L226 Difference]: Without dead ends: 422 [2022-02-24 03:54:22,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36792 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=33421, Invalid=85949, Unknown=0, NotChecked=0, Total=119370 [2022-02-24 03:54:22,557 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 277 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15511 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 15511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:22,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 34 Invalid, 15868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 15511 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-24 03:54:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-02-24 03:54:22,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2022-02-24 03:54:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 417 states have (on average 1.0119904076738608) internal successors, (422), 417 states have internal predecessors, (422), 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 03:54:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 426 transitions. [2022-02-24 03:54:22,613 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 426 transitions. Word has length 266 [2022-02-24 03:54:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:22,613 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 426 transitions. [2022-02-24 03:54:22,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.5144508670520231) internal successors, (262), 172 states have internal predecessors, (262), 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 03:54:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 426 transitions. [2022-02-24 03:54:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-24 03:54:22,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:22,614 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:22,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 03:54:22,614 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:22,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1055694555, now seen corresponding path program 78 times [2022-02-24 03:54:22,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:22,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887702523] [2022-02-24 03:54:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:22,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:22,777 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:22,945 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:25,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:25,944 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 03:54:29,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:29,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887702523] [2022-02-24 03:54:29,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1887702523] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:29,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:29,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [175] imperfect sequences [] total 175 [2022-02-24 03:54:29,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388549860] [2022-02-24 03:54:29,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:29,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2022-02-24 03:54:29,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2022-02-24 03:54:29,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11496, Invalid=20010, Unknown=0, NotChecked=0, Total=31506 [2022-02-24 03:54:29,579 INFO L87 Difference]: Start difference. First operand 422 states and 426 transitions. Second operand has 175 states, 175 states have (on average 1.5142857142857142) internal successors, (265), 174 states have internal predecessors, (265), 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 03:54:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:43,544 INFO L93 Difference]: Finished difference Result 667 states and 677 transitions. [2022-02-24 03:54:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-02-24 03:54:43,544 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.5142857142857142) internal successors, (265), 174 states have internal predecessors, (265), 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 269 [2022-02-24 03:54:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:43,545 INFO L225 Difference]: With dead ends: 667 [2022-02-24 03:54:43,545 INFO L226 Difference]: Without dead ends: 425 [2022-02-24 03:54:43,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37648 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=34117, Invalid=88033, Unknown=0, NotChecked=0, Total=122150 [2022-02-24 03:54:43,551 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 642 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15925 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 16650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 15925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:43,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 34 Invalid, 16650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 15925 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-24 03:54:43,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-02-24 03:54:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-02-24 03:54:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.0119047619047619) internal successors, (425), 420 states have internal predecessors, (425), 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 03:54:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 429 transitions. [2022-02-24 03:54:43,632 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 429 transitions. Word has length 269 [2022-02-24 03:54:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:43,632 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 429 transitions. [2022-02-24 03:54:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.5142857142857142) internal successors, (265), 174 states have internal predecessors, (265), 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 03:54:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 429 transitions. [2022-02-24 03:54:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-02-24 03:54:43,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:43,633 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:43,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 03:54:43,633 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1453065389, now seen corresponding path program 79 times [2022-02-24 03:54:43,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:43,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462495661] [2022-02-24 03:54:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:43,718 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:43,801 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:47,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:47,072 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 03:54:50,738 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:50,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462495661] [2022-02-24 03:54:50,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1462495661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:50,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:50,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [177] imperfect sequences [] total 177 [2022-02-24 03:54:50,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809786013] [2022-02-24 03:54:50,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:50,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-02-24 03:54:50,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-02-24 03:54:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11760, Invalid=20460, Unknown=0, NotChecked=0, Total=32220 [2022-02-24 03:54:50,741 INFO L87 Difference]: Start difference. First operand 425 states and 429 transitions. Second operand has 177 states, 177 states have (on average 1.5141242937853108) internal successors, (268), 176 states have internal predecessors, (268), 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 03:55:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:03,739 INFO L93 Difference]: Finished difference Result 671 states and 681 transitions. [2022-02-24 03:55:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-02-24 03:55:03,739 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.5141242937853108) internal successors, (268), 176 states have internal predecessors, (268), 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 272 [2022-02-24 03:55:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:03,741 INFO L225 Difference]: With dead ends: 671 [2022-02-24 03:55:03,741 INFO L226 Difference]: Without dead ends: 428 [2022-02-24 03:55:03,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38521 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=34905, Invalid=90057, Unknown=0, NotChecked=0, Total=124962 [2022-02-24 03:55:03,746 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 648 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16306 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 16306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:03,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 39 Invalid, 17035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 16306 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-24 03:55:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-02-24 03:55:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2022-02-24 03:55:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.011820330969267) internal successors, (428), 423 states have internal predecessors, (428), 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 03:55:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 432 transitions. [2022-02-24 03:55:03,804 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 432 transitions. Word has length 272 [2022-02-24 03:55:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:03,805 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 432 transitions. [2022-02-24 03:55:03,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.5141242937853108) internal successors, (268), 176 states have internal predecessors, (268), 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 03:55:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 432 transitions. [2022-02-24 03:55:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-02-24 03:55:03,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:03,806 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:03,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 03:55:03,806 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash 768040305, now seen corresponding path program 80 times [2022-02-24 03:55:03,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:03,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973428344] [2022-02-24 03:55:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:03,908 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:04,052 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:07,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:07,852 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 03:55:12,161 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:12,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973428344] [2022-02-24 03:55:12,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973428344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:12,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:12,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2022-02-24 03:55:12,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035568227] [2022-02-24 03:55:12,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:12,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-02-24 03:55:12,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-02-24 03:55:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12113, Invalid=20829, Unknown=0, NotChecked=0, Total=32942 [2022-02-24 03:55:12,167 INFO L87 Difference]: Start difference. First operand 428 states and 432 transitions. Second operand has 179 states, 179 states have (on average 1.5139664804469273) internal successors, (271), 178 states have internal predecessors, (271), 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 03:55:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:29,053 INFO L93 Difference]: Finished difference Result 675 states and 685 transitions. [2022-02-24 03:55:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-02-24 03:55:29,053 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.5139664804469273) internal successors, (271), 178 states have internal predecessors, (271), 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 275 [2022-02-24 03:55:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:29,055 INFO L225 Difference]: With dead ends: 675 [2022-02-24 03:55:29,055 INFO L226 Difference]: Without dead ends: 431 [2022-02-24 03:55:29,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39411 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=35788, Invalid=92018, Unknown=0, NotChecked=0, Total=127806 [2022-02-24 03:55:29,060 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 378 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16628 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 17090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 16628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:29,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 49 Invalid, 17090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 16628 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-24 03:55:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-02-24 03:55:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-02-24 03:55:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 426 states have (on average 1.011737089201878) internal successors, (431), 426 states have internal predecessors, (431), 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 03:55:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 435 transitions. [2022-02-24 03:55:29,113 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 435 transitions. Word has length 275 [2022-02-24 03:55:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:29,114 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 435 transitions. [2022-02-24 03:55:29,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.5139664804469273) internal successors, (271), 178 states have internal predecessors, (271), 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 03:55:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 435 transitions. [2022-02-24 03:55:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-02-24 03:55:29,115 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:29,115 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:29,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 03:55:29,115 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1985065239, now seen corresponding path program 81 times [2022-02-24 03:55:29,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:29,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967243140] [2022-02-24 03:55:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:29,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:29,278 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:29,393 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:32,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:36,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:36,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967243140] [2022-02-24 03:55:36,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1967243140] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:36,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:36,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [181] imperfect sequences [] total 181 [2022-02-24 03:55:36,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795744218] [2022-02-24 03:55:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:36,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2022-02-24 03:55:36,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2022-02-24 03:55:36,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12384, Invalid=21288, Unknown=0, NotChecked=0, Total=33672 [2022-02-24 03:55:36,375 INFO L87 Difference]: Start difference. First operand 431 states and 435 transitions. Second operand has 181 states, 181 states have (on average 1.5138121546961325) internal successors, (274), 180 states have internal predecessors, (274), 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 03:55:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:49,720 INFO L93 Difference]: Finished difference Result 679 states and 689 transitions. [2022-02-24 03:55:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-02-24 03:55:49,720 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 1.5138121546961325) internal successors, (274), 180 states have internal predecessors, (274), 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 278 [2022-02-24 03:55:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:49,722 INFO L225 Difference]: With dead ends: 679 [2022-02-24 03:55:49,722 INFO L226 Difference]: Without dead ends: 434 [2022-02-24 03:55:49,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40304 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=36595, Invalid=94087, Unknown=0, NotChecked=0, Total=130682 [2022-02-24 03:55:49,727 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 571 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17019 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 17672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 17019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:49,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 44 Invalid, 17672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 17019 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-24 03:55:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-24 03:55:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-02-24 03:55:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 429 states have (on average 1.0116550116550116) internal successors, (434), 429 states have internal predecessors, (434), 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 03:55:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 438 transitions. [2022-02-24 03:55:49,785 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 438 transitions. Word has length 278 [2022-02-24 03:55:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:49,785 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 438 transitions. [2022-02-24 03:55:49,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 1.5138121546961325) internal successors, (274), 180 states have internal predecessors, (274), 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 03:55:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 438 transitions. [2022-02-24 03:55:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-02-24 03:55:49,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:49,800 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:49,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 03:55:49,800 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1413169657, now seen corresponding path program 82 times [2022-02-24 03:55:49,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:49,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104470968] [2022-02-24 03:55:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:49,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:49,983 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:50,065 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:52,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:52,747 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 03:55:56,348 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:56,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104470968] [2022-02-24 03:55:56,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [104470968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:56,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:56,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [183] imperfect sequences [] total 183 [2022-02-24 03:55:56,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201364665] [2022-02-24 03:55:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-02-24 03:55:56,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-02-24 03:55:56,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12570, Invalid=21840, Unknown=0, NotChecked=0, Total=34410 [2022-02-24 03:55:56,352 INFO L87 Difference]: Start difference. First operand 434 states and 438 transitions. Second operand has 183 states, 183 states have (on average 1.5136612021857923) internal successors, (277), 182 states have internal predecessors, (277), 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 03:56:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:10,982 INFO L93 Difference]: Finished difference Result 683 states and 693 transitions. [2022-02-24 03:56:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-02-24 03:56:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.5136612021857923) internal successors, (277), 182 states have internal predecessors, (277), 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 281 [2022-02-24 03:56:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:10,984 INFO L225 Difference]: With dead ends: 683 [2022-02-24 03:56:10,984 INFO L226 Difference]: Without dead ends: 437 [2022-02-24 03:56:10,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41200 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=37323, Invalid=96267, Unknown=0, NotChecked=0, Total=133590 [2022-02-24 03:56:10,988 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 576 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17356 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 17356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:10,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 39 Invalid, 18018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 17356 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-24 03:56:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-24 03:56:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-02-24 03:56:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 432 states have (on average 1.0115740740740742) internal successors, (437), 432 states have internal predecessors, (437), 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 03:56:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 441 transitions. [2022-02-24 03:56:11,044 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 441 transitions. Word has length 281 [2022-02-24 03:56:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:11,044 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 441 transitions. [2022-02-24 03:56:11,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.5136612021857923) internal successors, (277), 182 states have internal predecessors, (277), 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 03:56:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 441 transitions. [2022-02-24 03:56:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-24 03:56:11,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:11,046 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:11,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 03:56:11,046 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:11,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1913271423, now seen corresponding path program 83 times [2022-02-24 03:56:11,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:11,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316722718] [2022-02-24 03:56:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:11,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:11,141 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:11,295 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:14,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:14,096 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 03:56:17,799 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:17,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316722718] [2022-02-24 03:56:17,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [316722718] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:17,799 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:17,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [185] imperfect sequences [] total 185 [2022-02-24 03:56:17,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105310778] [2022-02-24 03:56:17,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:17,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2022-02-24 03:56:17,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:17,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2022-02-24 03:56:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12935, Invalid=22221, Unknown=0, NotChecked=0, Total=35156 [2022-02-24 03:56:17,803 INFO L87 Difference]: Start difference. First operand 437 states and 441 transitions. Second operand has 185 states, 185 states have (on average 1.5135135135135136) internal successors, (280), 184 states have internal predecessors, (280), 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 03:56:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:33,415 INFO L93 Difference]: Finished difference Result 687 states and 697 transitions. [2022-02-24 03:56:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-24 03:56:33,416 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.5135135135135136) internal successors, (280), 184 states have internal predecessors, (280), 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 284 [2022-02-24 03:56:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:33,417 INFO L225 Difference]: With dead ends: 687 [2022-02-24 03:56:33,417 INFO L226 Difference]: Without dead ends: 440 [2022-02-24 03:56:33,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42120 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=38236, Invalid=98294, Unknown=0, NotChecked=0, Total=136530 [2022-02-24 03:56:33,422 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 582 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 17776 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 17776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:33,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 34 Invalid, 18443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 17776 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-24 03:56:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-02-24 03:56:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-02-24 03:56:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.0114942528735633) internal successors, (440), 435 states have internal predecessors, (440), 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 03:56:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 444 transitions. [2022-02-24 03:56:33,479 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 444 transitions. Word has length 284 [2022-02-24 03:56:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:33,479 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 444 transitions. [2022-02-24 03:56:33,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.5135135135135136) internal successors, (280), 184 states have internal predecessors, (280), 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 03:56:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 444 transitions. [2022-02-24 03:56:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-02-24 03:56:33,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:33,480 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:33,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 03:56:33,480 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:33,481 INFO L85 PathProgramCache]: Analyzing trace with hash 569548957, now seen corresponding path program 84 times [2022-02-24 03:56:33,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:33,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644961003] [2022-02-24 03:56:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:33,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:33,682 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:33,849 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:36,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:36,640 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 03:56:40,365 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:40,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644961003] [2022-02-24 03:56:40,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1644961003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:40,365 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:40,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [188] imperfect sequences [] total 188 [2022-02-24 03:56:40,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71849137] [2022-02-24 03:56:40,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:40,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-02-24 03:56:40,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-02-24 03:56:40,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13115, Invalid=22041, Unknown=0, NotChecked=0, Total=35156 [2022-02-24 03:56:40,369 INFO L87 Difference]: Start difference. First operand 440 states and 444 transitions. Second operand has 188 states, 188 states have (on average 1.5053191489361701) internal successors, (283), 187 states have internal predecessors, (283), 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 03:56:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:55,519 INFO L93 Difference]: Finished difference Result 726 states and 771 transitions. [2022-02-24 03:56:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-02-24 03:56:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.5053191489361701) internal successors, (283), 187 states have internal predecessors, (283), 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 287 [2022-02-24 03:56:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:55,523 INFO L225 Difference]: With dead ends: 726 [2022-02-24 03:56:55,523 INFO L226 Difference]: Without dead ends: 478 [2022-02-24 03:56:55,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42763 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=39339, Invalid=99417, Unknown=0, NotChecked=0, Total=138756 [2022-02-24 03:56:55,532 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 966 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17648 mSolverCounterSat, 796 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 17648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:55,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 44 Invalid, 18444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 17648 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-02-24 03:56:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-02-24 03:56:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2022-02-24 03:56:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 289 states have (on average 1.013840830449827) internal successors, (293), 289 states have internal predecessors, (293), 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 03:56:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 297 transitions. [2022-02-24 03:56:55,568 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 297 transitions. Word has length 287 [2022-02-24 03:56:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:55,569 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 297 transitions. [2022-02-24 03:56:55,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.5053191489361701) internal successors, (283), 187 states have internal predecessors, (283), 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 03:56:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 297 transitions. [2022-02-24 03:56:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-02-24 03:56:55,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:55,570 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:55,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 03:56:55,570 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1457593037, now seen corresponding path program 85 times [2022-02-24 03:56:55,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:55,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185489251] [2022-02-24 03:56:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:55,709 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:55,928 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:00,230 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 03:57:04,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:04,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185489251] [2022-02-24 03:57:04,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [185489251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:04,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:04,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [191] imperfect sequences [] total 191 [2022-02-24 03:57:04,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057413223] [2022-02-24 03:57:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:04,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-02-24 03:57:04,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-02-24 03:57:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13784, Invalid=23658, Unknown=0, NotChecked=0, Total=37442 [2022-02-24 03:57:04,950 INFO L87 Difference]: Start difference. First operand 294 states and 297 transitions. Second operand has 191 states, 191 states have (on average 1.513089005235602) internal successors, (289), 190 states have internal predecessors, (289), 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 03:57:22,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:22,541 INFO L93 Difference]: Finished difference Result 771 states and 782 transitions. [2022-02-24 03:57:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-02-24 03:57:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.513089005235602) internal successors, (289), 190 states have internal predecessors, (289), 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 293 [2022-02-24 03:57:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:22,542 INFO L225 Difference]: With dead ends: 771 [2022-02-24 03:57:22,543 INFO L226 Difference]: Without dead ends: 485 [2022-02-24 03:57:22,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44919 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=40765, Invalid=104777, Unknown=0, NotChecked=0, Total=145542 [2022-02-24 03:57:22,548 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 502 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18869 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 19461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 18869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:22,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 59 Invalid, 19461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 18869 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-24 03:57:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-24 03:57:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 485. [2022-02-24 03:57:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.0104166666666667) internal successors, (485), 480 states have internal predecessors, (485), 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 03:57:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 489 transitions. [2022-02-24 03:57:22,633 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 489 transitions. Word has length 293 [2022-02-24 03:57:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:22,633 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 489 transitions. [2022-02-24 03:57:22,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.513089005235602) internal successors, (289), 190 states have internal predecessors, (289), 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 03:57:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 489 transitions. [2022-02-24 03:57:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-02-24 03:57:22,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:22,635 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:22,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 03:57:22,635 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:22,635 INFO L85 PathProgramCache]: Analyzing trace with hash 831638101, now seen corresponding path program 86 times [2022-02-24 03:57:22,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:22,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496379726] [2022-02-24 03:57:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:22,773 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:22,944 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:27,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:27,506 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 03:57:32,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:32,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496379726] [2022-02-24 03:57:32,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [496379726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:32,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:32,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [] total 193 [2022-02-24 03:57:32,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430584600] [2022-02-24 03:57:32,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:32,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-02-24 03:57:32,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-02-24 03:57:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14073, Invalid=24147, Unknown=0, NotChecked=0, Total=38220 [2022-02-24 03:57:32,524 INFO L87 Difference]: Start difference. First operand 485 states and 489 transitions. Second operand has 193 states, 193 states have (on average 1.5129533678756477) internal successors, (292), 192 states have internal predecessors, (292), 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 03:57:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:50,570 INFO L93 Difference]: Finished difference Result 775 states and 785 transitions. [2022-02-24 03:57:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-02-24 03:57:50,570 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.5129533678756477) internal successors, (292), 192 states have internal predecessors, (292), 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 296 [2022-02-24 03:57:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:50,572 INFO L225 Difference]: With dead ends: 775 [2022-02-24 03:57:50,572 INFO L226 Difference]: Without dead ends: 488 [2022-02-24 03:57:50,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 384 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45872 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=41626, Invalid=106984, Unknown=0, NotChecked=0, Total=148610 [2022-02-24 03:57:50,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 606 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19342 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 19342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:50,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 54 Invalid, 20037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 19342 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-24 03:57:50,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-02-24 03:57:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-02-24 03:57:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 483 states have (on average 1.010351966873706) internal successors, (488), 483 states have internal predecessors, (488), 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 03:57:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 492 transitions. [2022-02-24 03:57:50,647 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 492 transitions. Word has length 296 [2022-02-24 03:57:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:50,647 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 492 transitions. [2022-02-24 03:57:50,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.5129533678756477) internal successors, (292), 192 states have internal predecessors, (292), 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 03:57:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 492 transitions. [2022-02-24 03:57:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-02-24 03:57:50,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:50,648 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:50,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 03:57:50,648 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1876388809, now seen corresponding path program 87 times [2022-02-24 03:57:50,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:50,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757319370] [2022-02-24 03:57:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:50,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:50,757 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:51,045 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:54,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:54,083 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 03:57:58,581 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:58,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757319370] [2022-02-24 03:57:58,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [757319370] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:58,582 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:58,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [196] imperfect sequences [] total 196 [2022-02-24 03:57:58,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643955862] [2022-02-24 03:57:58,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:58,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2022-02-24 03:57:58,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2022-02-24 03:57:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14261, Invalid=23959, Unknown=0, NotChecked=0, Total=38220 [2022-02-24 03:57:58,587 INFO L87 Difference]: Start difference. First operand 488 states and 492 transitions. Second operand has 196 states, 196 states have (on average 1.5051020408163265) internal successors, (295), 195 states have internal predecessors, (295), 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 03:58:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:58:17,351 INFO L93 Difference]: Finished difference Result 786 states and 803 transitions. [2022-02-24 03:58:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-02-24 03:58:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.5051020408163265) internal successors, (295), 195 states have internal predecessors, (295), 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 299 [2022-02-24 03:58:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:58:17,354 INFO L225 Difference]: With dead ends: 786 [2022-02-24 03:58:17,354 INFO L226 Difference]: Without dead ends: 498 [2022-02-24 03:58:17,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46543 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=42777, Invalid=108155, Unknown=0, NotChecked=0, Total=150932 [2022-02-24 03:58:17,360 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 406 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19263 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 19870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 19263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:58:17,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 54 Invalid, 19870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 19263 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-24 03:58:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-24 03:58:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 306. [2022-02-24 03:58:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.0132890365448506) internal successors, (305), 301 states have internal predecessors, (305), 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 03:58:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 309 transitions. [2022-02-24 03:58:17,403 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 309 transitions. Word has length 299 [2022-02-24 03:58:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:58:17,403 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 309 transitions. [2022-02-24 03:58:17,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.5051020408163265) internal successors, (295), 195 states have internal predecessors, (295), 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 03:58:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 309 transitions. [2022-02-24 03:58:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-02-24 03:58:17,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:58:17,404 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:58:17,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 03:58:17,405 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:58:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:58:17,405 INFO L85 PathProgramCache]: Analyzing trace with hash 543822943, now seen corresponding path program 88 times [2022-02-24 03:58:17,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:58:17,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41328313] [2022-02-24 03:58:17,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:58:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:58:17,579 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:17,751 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:22,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:58:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:58:26,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:58:26,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41328313] [2022-02-24 03:58:26,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [41328313] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:58:26,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:58:26,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [199] imperfect sequences [] total 199 [2022-02-24 03:58:26,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005182838] [2022-02-24 03:58:26,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:58:26,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2022-02-24 03:58:26,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:58:26,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2022-02-24 03:58:26,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14958, Invalid=25644, Unknown=0, NotChecked=0, Total=40602 [2022-02-24 03:58:26,494 INFO L87 Difference]: Start difference. First operand 306 states and 309 transitions. Second operand has 199 states, 199 states have (on average 1.5125628140703518) internal successors, (301), 198 states have internal predecessors, (301), 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 03:58:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:58:46,764 INFO L93 Difference]: Finished difference Result 803 states and 814 transitions. [2022-02-24 03:58:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-02-24 03:58:46,765 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 1.5125628140703518) internal successors, (301), 198 states have internal predecessors, (301), 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 305 [2022-02-24 03:58:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:58:46,766 INFO L225 Difference]: With dead ends: 803 [2022-02-24 03:58:46,766 INFO L226 Difference]: Without dead ends: 505 [2022-02-24 03:58:46,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48791 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=44263, Invalid=113743, Unknown=0, NotChecked=0, Total=158006 [2022-02-24 03:58:46,771 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 625 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 20436 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 21155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 20436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:58:46,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 39 Invalid, 21155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 20436 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-24 03:58:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-02-24 03:58:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2022-02-24 03:58:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 500 states have (on average 1.01) internal successors, (505), 500 states have internal predecessors, (505), 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 03:58:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 509 transitions. [2022-02-24 03:58:46,848 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 509 transitions. Word has length 305 [2022-02-24 03:58:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:58:46,849 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 509 transitions. [2022-02-24 03:58:46,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 1.5125628140703518) internal successors, (301), 198 states have internal predecessors, (301), 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 03:58:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 509 transitions. [2022-02-24 03:58:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-02-24 03:58:46,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:58:46,850 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:58:46,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 03:58:46,850 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:58:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:58:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1694432983, now seen corresponding path program 89 times [2022-02-24 03:58:46,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:58:46,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547449961] [2022-02-24 03:58:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:58:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:58:46,954 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:47,087 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:58:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.