/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:44:11,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:44:11,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:44:11,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:44:11,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:44:11,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:44:11,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:44:11,546 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 03:44:11,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:44:11,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:44:11,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:44:11,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:44:11,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:44:11,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:44:11,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:44:11,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:44:11,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:44:11,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:44:11,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:44:11,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:44:11,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:44:11,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:44:11,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:44:11,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:44:11,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:44:11,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:44:11,561 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:44:11,561 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:44:11,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:44:11,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:44:11,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:44:11,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:44:11,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:44:11,759 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:44:11,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2022-02-24 03:44:11,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52fff1cd4/41cb60e5fa7948a4a6b643c3d370fc94/FLAG7d2faf17b [2022-02-24 03:44:12,143 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:44:12,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2022-02-24 03:44:12,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52fff1cd4/41cb60e5fa7948a4a6b643c3d370fc94/FLAG7d2faf17b [2022-02-24 03:44:12,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52fff1cd4/41cb60e5fa7948a4a6b643c3d370fc94 [2022-02-24 03:44:12,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:44:12,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:44:12,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:44:12,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:44:12,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:44:12,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624b835d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12, skipping insertion in model container [2022-02-24 03:44:12,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:44:12,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:44:12,303 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_10.c[319,332] [2022-02-24 03:44:12,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:44:12,314 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:44:12,321 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_10.c[319,332] [2022-02-24 03:44:12,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:44:12,330 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:44:12,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12 WrapperNode [2022-02-24 03:44:12,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:44:12,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:44:12,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:44:12,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:44:12,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:44:12,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:44:12,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:44:12,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:44:12,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (1/1) ... [2022-02-24 03:44:12,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:44:12,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:44:12,384 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 03:44:12,391 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 03:44:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:44:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:44:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:44:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:44:12,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:44:12,414 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:44:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:44:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:44:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:44:12,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:44:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:44:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:44:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:44:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:44:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:44:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:44:12,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:44:12,461 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:44:12,464 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:44:12,564 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:44:12,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:44:12,568 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 03:44:12,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:44:12 BoogieIcfgContainer [2022-02-24 03:44:12,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:44:12,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:44:12,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:44:12,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:44:12,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:44:12" (1/3) ... [2022-02-24 03:44:12,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463feabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:44:12, skipping insertion in model container [2022-02-24 03:44:12,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:44:12" (2/3) ... [2022-02-24 03:44:12,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463feabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:44:12, skipping insertion in model container [2022-02-24 03:44:12,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:44:12" (3/3) ... [2022-02-24 03:44:12,587 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_10.c [2022-02-24 03:44:12,591 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:44:12,591 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:44:12,632 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:44:12,637 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 03:44:12,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:44:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 03:44:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 03:44:12,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:12,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:12,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2022-02-24 03:44:12,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:12,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958693211] [2022-02-24 03:44:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:12,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:12,721 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:44:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:12,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:12,797 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 03:44:12,798 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:12,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958693211] [2022-02-24 03:44:12,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [958693211] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:12,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:12,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:44:12,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305291662] [2022-02-24 03:44:12,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:12,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:44:12,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:44:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:44:12,827 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:12,874 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-24 03:44:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:44:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-02-24 03:44:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:12,881 INFO L225 Difference]: With dead ends: 33 [2022-02-24 03:44:12,881 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 03:44:12,883 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 03:44:12,891 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 03:44:12,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 03:44:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 03:44:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 03:44:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-24 03:44:12,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-24 03:44:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:12,919 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-24 03:44:12,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-24 03:44:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 03:44:12,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:12,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:12,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:44:12,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:12,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2022-02-24 03:44:12,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:12,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863762289] [2022-02-24 03:44:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:12,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:12,924 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:44:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,022 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 03:44:13,022 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:13,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863762289] [2022-02-24 03:44:13,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863762289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:13,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:13,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:44:13,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365007914] [2022-02-24 03:44:13,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:13,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:44:13,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:44:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:44:13,025 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:13,062 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-02-24 03:44:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:44:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-02-24 03:44:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:13,063 INFO L225 Difference]: With dead ends: 25 [2022-02-24 03:44:13,063 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 03:44:13,063 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 03:44:13,064 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 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 03:44:13,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 03:44:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-24 03:44:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 03:44:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-24 03:44:13,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-02-24 03:44:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:13,069 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-24 03:44:13,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-24 03:44:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:44:13,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:13,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:13,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:44:13,070 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:13,071 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 1 times [2022-02-24 03:44:13,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:13,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156229005] [2022-02-24 03:44:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:13,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:13,145 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,233 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 03:44:13,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:13,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156229005] [2022-02-24 03:44:13,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1156229005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:13,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:13,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:44:13,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734873125] [2022-02-24 03:44:13,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:13,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:44:13,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:44:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:44:13,287 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 03:44:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:13,358 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-02-24 03:44:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 03:44:13,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 03:44:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:13,359 INFO L225 Difference]: With dead ends: 28 [2022-02-24 03:44:13,359 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:44:13,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:44:13,360 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:13,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:44:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-02-24 03:44:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 03:44:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-02-24 03:44:13,365 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-02-24 03:44:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:13,365 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-02-24 03:44:13,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 03:44:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-02-24 03:44:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:44:13,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:13,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:13,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:44:13,366 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:13,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2084821988, now seen corresponding path program 2 times [2022-02-24 03:44:13,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:13,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617159846] [2022-02-24 03:44:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:13,429 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:13,479 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,587 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 03:44:13,640 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:13,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617159846] [2022-02-24 03:44:13,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617159846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:13,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:13,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:44:13,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033357923] [2022-02-24 03:44:13,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:13,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:44:13,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:13,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:44:13,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:44:13,644 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:13,723 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-02-24 03:44:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:44:13,723 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:44:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:13,725 INFO L225 Difference]: With dead ends: 31 [2022-02-24 03:44:13,725 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 03:44:13,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:44:13,733 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:13,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 03:44:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-02-24 03:44:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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 03:44:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-02-24 03:44:13,748 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-02-24 03:44:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:13,748 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-02-24 03:44:13,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-02-24 03:44:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:44:13,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:13,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:13,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:44:13,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:13,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1442444596, now seen corresponding path program 3 times [2022-02-24 03:44:13,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:13,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425639048] [2022-02-24 03:44:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:13,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:13,792 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:13,833 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:13,939 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 03:44:14,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:14,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425639048] [2022-02-24 03:44:14,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425639048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:14,015 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:14,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:44:14,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559488345] [2022-02-24 03:44:14,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:14,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:44:14,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:44:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:44:14,018 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:14,123 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-02-24 03:44:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:44:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 03:44:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:14,125 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:44:14,125 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 03:44:14,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:44:14,129 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:14,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:44:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 03:44:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-24 03:44:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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 03:44:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-02-24 03:44:14,138 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2022-02-24 03:44:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:14,140 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-02-24 03:44:14,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-02-24 03:44:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:44:14,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:14,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:14,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:44:14,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1571384604, now seen corresponding path program 4 times [2022-02-24 03:44:14,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:14,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020117562] [2022-02-24 03:44:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:14,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:14,190 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:14,229 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:14,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:14,312 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 03:44:14,409 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:14,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020117562] [2022-02-24 03:44:14,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020117562] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:14,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:14,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:44:14,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401079494] [2022-02-24 03:44:14,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:14,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:44:14,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:14,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:44:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:44:14,412 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:14,547 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-02-24 03:44:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:44:14,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 03:44:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:14,548 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:44:14,548 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 03:44:14,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:44:14,548 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:14,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 39 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 03:44:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-02-24 03:44:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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 03:44:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-02-24 03:44:14,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2022-02-24 03:44:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:14,554 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-02-24 03:44:14,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-02-24 03:44:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:44:14,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:14,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:14,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:44:14,555 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1172566988, now seen corresponding path program 5 times [2022-02-24 03:44:14,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:14,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050956699] [2022-02-24 03:44:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:14,593 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:14,640 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:14,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:14,695 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 03:44:14,854 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:14,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050956699] [2022-02-24 03:44:14,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050956699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:14,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:14,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:44:14,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852764606] [2022-02-24 03:44:14,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:14,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:44:14,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:14,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:44:14,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:44:14,855 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:14,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:14,990 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-02-24 03:44:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:44:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 03:44:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:14,991 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:44:14,991 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 03:44:14,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:44:14,992 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:14,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 03:44:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-02-24 03:44:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-02-24 03:44:14,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-02-24 03:44:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:14,997 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-02-24 03:44:14,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-02-24 03:44:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:44:14,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:14,997 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:14,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:44:14,998 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash 121899492, now seen corresponding path program 6 times [2022-02-24 03:44:14,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:14,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761190224] [2022-02-24 03:44:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:14,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:15,032 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:15,067 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:15,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:15,137 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 03:44:15,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:15,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761190224] [2022-02-24 03:44:15,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [761190224] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:15,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:15,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:44:15,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209556734] [2022-02-24 03:44:15,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:15,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:44:15,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:44:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:44:15,284 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:15,452 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-02-24 03:44:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:44:15,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 03:44:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:15,453 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:44:15,453 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 03:44:15,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:44:15,454 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:15,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 49 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 03:44:15,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-24 03:44:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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 03:44:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-02-24 03:44:15,459 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-02-24 03:44:15,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:15,459 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-02-24 03:44:15,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:15,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-02-24 03:44:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:44:15,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:15,460 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:15,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:44:15,460 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1408179404, now seen corresponding path program 7 times [2022-02-24 03:44:15,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:15,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311625935] [2022-02-24 03:44:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:15,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:15,490 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:15,518 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:15,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:15,561 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 03:44:15,736 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:15,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311625935] [2022-02-24 03:44:15,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [311625935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:15,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:15,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:44:15,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321382223] [2022-02-24 03:44:15,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:15,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:44:15,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:15,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:44:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:44:15,738 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:15,928 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-02-24 03:44:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:44:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 03:44:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:15,929 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:44:15,929 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 03:44:15,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 15 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:44:15,930 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:15,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 03:44:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-02-24 03:44:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 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 03:44:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-02-24 03:44:15,935 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-02-24 03:44:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:15,935 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-02-24 03:44:15,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-02-24 03:44:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:44:15,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:15,936 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:15,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:44:15,936 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:15,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1274822884, now seen corresponding path program 8 times [2022-02-24 03:44:15,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:15,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719878048] [2022-02-24 03:44:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:15,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:15,968 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:16,001 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:16,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:16,069 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 03:44:16,291 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:16,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719878048] [2022-02-24 03:44:16,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [719878048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:16,292 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:16,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:44:16,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767985131] [2022-02-24 03:44:16,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:16,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:44:16,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:16,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:44:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:44:16,293 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:16,514 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-02-24 03:44:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:44:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 03:44:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:16,515 INFO L225 Difference]: With dead ends: 49 [2022-02-24 03:44:16,515 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 03:44:16,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:44:16,515 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:16,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 59 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 03:44:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-02-24 03:44:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 03:44:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-02-24 03:44:16,521 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2022-02-24 03:44:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-02-24 03:44:16,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:16,521 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-02-24 03:44:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 03:44:16,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:16,522 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:16,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:44:16,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1295484364, now seen corresponding path program 9 times [2022-02-24 03:44:16,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:16,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675280300] [2022-02-24 03:44:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:16,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:16,557 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:16,585 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:16,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:16,634 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 03:44:16,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:16,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675280300] [2022-02-24 03:44:16,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675280300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:16,889 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:16,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:44:16,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745874701] [2022-02-24 03:44:16,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:16,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:44:16,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:44:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:44:16,890 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:17,152 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-02-24 03:44:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:44:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 03:44:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:17,153 INFO L225 Difference]: With dead ends: 52 [2022-02-24 03:44:17,153 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:44:17,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 19 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:44:17,154 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:17,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:44:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:44:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-02-24 03:44:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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 03:44:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-02-24 03:44:17,159 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-02-24 03:44:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:17,159 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-02-24 03:44:17,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-02-24 03:44:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:44:17,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:17,159 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:17,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:44:17,160 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1653655580, now seen corresponding path program 10 times [2022-02-24 03:44:17,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:17,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971688407] [2022-02-24 03:44:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:17,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:17,189 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:17,216 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:17,250 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 03:44:17,552 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:17,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971688407] [2022-02-24 03:44:17,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [971688407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:17,552 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:17,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:44:17,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527906913] [2022-02-24 03:44:17,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:17,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:44:17,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:44:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:44:17,553 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:17,864 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-02-24 03:44:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:44:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 03:44:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:17,865 INFO L225 Difference]: With dead ends: 55 [2022-02-24 03:44:17,865 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 03:44:17,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 21 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:44:17,866 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:17,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 69 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:44:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 03:44:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-02-24 03:44:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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 03:44:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-02-24 03:44:17,871 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2022-02-24 03:44:17,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:17,871 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-02-24 03:44:17,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-02-24 03:44:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:44:17,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:17,872 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:17,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:44:17,872 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:17,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:17,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1630720308, now seen corresponding path program 11 times [2022-02-24 03:44:17,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:17,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989950151] [2022-02-24 03:44:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:17,905 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:17,932 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:17,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:17,971 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 03:44:18,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:18,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989950151] [2022-02-24 03:44:18,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989950151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:18,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:18,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:44:18,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475667025] [2022-02-24 03:44:18,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:18,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:44:18,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:44:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:44:18,357 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:18,730 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-02-24 03:44:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:44:18,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:44:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:18,731 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:44:18,731 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:44:18,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:44:18,732 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:18,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:44:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:44:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-02-24 03:44:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-02-24 03:44:18,737 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-02-24 03:44:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:18,737 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-02-24 03:44:18,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-02-24 03:44:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:44:18,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:18,737 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:18,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:44:18,738 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1265832220, now seen corresponding path program 12 times [2022-02-24 03:44:18,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:18,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611657826] [2022-02-24 03:44:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:18,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:18,764 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:18,793 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:18,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:19,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:19,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611657826] [2022-02-24 03:44:19,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [611657826] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:19,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:19,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:44:19,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513803859] [2022-02-24 03:44:19,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:19,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:44:19,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:19,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:44:19,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:44:19,343 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:19,796 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-02-24 03:44:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:44:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 03:44:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:19,797 INFO L225 Difference]: With dead ends: 61 [2022-02-24 03:44:19,797 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 03:44:19,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 25 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:44:19,798 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:19,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:44:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 03:44:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-24 03:44:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 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 03:44:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-02-24 03:44:19,804 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2022-02-24 03:44:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:19,804 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-02-24 03:44:19,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-02-24 03:44:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 03:44:19,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:19,805 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:19,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:44:19,805 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:19,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:19,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1447028788, now seen corresponding path program 13 times [2022-02-24 03:44:19,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:19,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680199827] [2022-02-24 03:44:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:19,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:19,840 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:19,862 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:19,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:19,903 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 03:44:20,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:20,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680199827] [2022-02-24 03:44:20,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680199827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:20,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:20,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:44:20,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521566083] [2022-02-24 03:44:20,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:20,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:44:20,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:44:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:44:20,431 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:20,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:20,936 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-02-24 03:44:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:44:20,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 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 50 [2022-02-24 03:44:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:20,936 INFO L225 Difference]: With dead ends: 64 [2022-02-24 03:44:20,936 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:44:20,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 27 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:44:20,938 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:20,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 84 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:44:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:44:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-24 03:44:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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 03:44:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-02-24 03:44:20,945 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-02-24 03:44:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:20,945 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-02-24 03:44:20,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-02-24 03:44:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 03:44:20,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:20,946 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:20,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:44:20,946 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash -700095004, now seen corresponding path program 14 times [2022-02-24 03:44:20,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:20,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515160741] [2022-02-24 03:44:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:20,974 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:20,999 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:21,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:21,050 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 03:44:21,670 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:21,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515160741] [2022-02-24 03:44:21,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [515160741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:21,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:21,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:44:21,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699616131] [2022-02-24 03:44:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:21,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:44:21,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:21,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:44:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:44:21,672 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:22,266 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-02-24 03:44:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:44:22,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 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 53 [2022-02-24 03:44:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:22,268 INFO L225 Difference]: With dead ends: 67 [2022-02-24 03:44:22,268 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 03:44:22,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 29 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:44:22,270 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:22,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 89 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:44:22,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 03:44:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-02-24 03:44:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 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 03:44:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-02-24 03:44:22,280 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-02-24 03:44:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:22,280 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-02-24 03:44:22,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-02-24 03:44:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 03:44:22,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:22,281 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:22,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:44:22,281 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:22,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1021296436, now seen corresponding path program 15 times [2022-02-24 03:44:22,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:22,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518754168] [2022-02-24 03:44:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:22,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:22,310 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:22,335 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:22,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:22,392 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 03:44:23,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:23,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518754168] [2022-02-24 03:44:23,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518754168] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:23,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:23,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:44:23,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325384512] [2022-02-24 03:44:23,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:23,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:44:23,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:44:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:44:23,200 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:23,881 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-02-24 03:44:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:44:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 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 56 [2022-02-24 03:44:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:23,882 INFO L225 Difference]: With dead ends: 70 [2022-02-24 03:44:23,882 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:44:23,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 7 SyntacticMatches, 31 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:44:23,883 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:23,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 94 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:44:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:44:23,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-02-24 03:44:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-02-24 03:44:23,889 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-02-24 03:44:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:23,889 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-02-24 03:44:23,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-02-24 03:44:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:44:23,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:23,890 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:23,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:44:23,890 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:23,890 INFO L85 PathProgramCache]: Analyzing trace with hash -746021660, now seen corresponding path program 16 times [2022-02-24 03:44:23,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:23,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839506591] [2022-02-24 03:44:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:23,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:23,918 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:23,943 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:23,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:23,984 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 03:44:24,924 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:24,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839506591] [2022-02-24 03:44:24,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839506591] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:24,925 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:24,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:44:24,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83696633] [2022-02-24 03:44:24,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:24,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:44:24,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:24,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:44:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:44:24,926 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:25,652 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-02-24 03:44:25,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:44:25,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 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 59 [2022-02-24 03:44:25,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:25,653 INFO L225 Difference]: With dead ends: 73 [2022-02-24 03:44:25,653 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:44:25,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 33 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:44:25,653 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:25,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 99 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:44:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:44:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-02-24 03:44:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-02-24 03:44:25,659 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2022-02-24 03:44:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:25,659 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-02-24 03:44:25,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-02-24 03:44:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:44:25,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:25,660 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:25,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:44:25,660 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash 872262092, now seen corresponding path program 17 times [2022-02-24 03:44:25,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:25,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367515912] [2022-02-24 03:44:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:25,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:25,688 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:25,714 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:25,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:25,779 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 03:44:27,013 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:27,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367515912] [2022-02-24 03:44:27,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [367515912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:27,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:27,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:44:27,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753228648] [2022-02-24 03:44:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:27,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:44:27,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:27,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:44:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:44:27,015 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:27,918 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-02-24 03:44:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:44:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (3), 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 62 [2022-02-24 03:44:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:27,919 INFO L225 Difference]: With dead ends: 76 [2022-02-24 03:44:27,919 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:44:27,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 7 SyntacticMatches, 35 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:44:27,920 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:27,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 104 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:44:27,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:44:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-02-24 03:44:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 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 03:44:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-02-24 03:44:27,927 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-02-24 03:44:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:27,927 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-02-24 03:44:27,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-02-24 03:44:27,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 03:44:27,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:27,927 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:27,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:44:27,928 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:27,928 INFO L85 PathProgramCache]: Analyzing trace with hash 155620324, now seen corresponding path program 18 times [2022-02-24 03:44:27,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:27,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999194929] [2022-02-24 03:44:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:27,956 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:27,989 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:28,037 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 03:44:29,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:29,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999194929] [2022-02-24 03:44:29,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [999194929] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:29,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:29,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:44:29,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46611302] [2022-02-24 03:44:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:29,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:44:29,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:44:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:44:29,358 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:30,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:30,330 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-02-24 03:44:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:44:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2022-02-24 03:44:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:30,331 INFO L225 Difference]: With dead ends: 79 [2022-02-24 03:44:30,331 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 03:44:30,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 37 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:44:30,332 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:30,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 109 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:44:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 03:44:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-02-24 03:44:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 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 03:44:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-02-24 03:44:30,345 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2022-02-24 03:44:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:30,345 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-02-24 03:44:30,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-02-24 03:44:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 03:44:30,346 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:30,346 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:30,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:44:30,346 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash 963138252, now seen corresponding path program 19 times [2022-02-24 03:44:30,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:30,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551907624] [2022-02-24 03:44:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:30,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:30,374 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:30,400 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:30,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:30,465 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 03:44:32,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:32,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551907624] [2022-02-24 03:44:32,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [551907624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:32,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:32,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:44:32,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459465910] [2022-02-24 03:44:32,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:32,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:44:32,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:44:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:44:32,087 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:33,250 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-02-24 03:44:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:44:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 2 states have call successors, (3), 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 68 [2022-02-24 03:44:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:33,251 INFO L225 Difference]: With dead ends: 82 [2022-02-24 03:44:33,251 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 03:44:33,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 9 SyntacticMatches, 39 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:44:33,252 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:33,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:44:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 03:44:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-02-24 03:44:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-02-24 03:44:33,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2022-02-24 03:44:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:33,259 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-02-24 03:44:33,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-02-24 03:44:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 03:44:33,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:33,260 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:33,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:44:33,260 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1617906404, now seen corresponding path program 20 times [2022-02-24 03:44:33,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:33,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828511652] [2022-02-24 03:44:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:33,296 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:33,322 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:33,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:33,381 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 03:44:35,312 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:35,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828511652] [2022-02-24 03:44:35,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [828511652] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:35,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:35,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:44:35,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739018615] [2022-02-24 03:44:35,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:35,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:44:35,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:35,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:44:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:44:35,313 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:36,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:36,552 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-02-24 03:44:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:44:36,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2022-02-24 03:44:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:36,553 INFO L225 Difference]: With dead ends: 85 [2022-02-24 03:44:36,553 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 03:44:36,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 9 SyntacticMatches, 41 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:44:36,554 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:36,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 119 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:44:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 03:44:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-02-24 03:44:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-02-24 03:44:36,561 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2022-02-24 03:44:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:36,562 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-02-24 03:44:36,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-02-24 03:44:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:44:36,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:36,565 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:36,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:44:36,566 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash 74464204, now seen corresponding path program 21 times [2022-02-24 03:44:36,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:36,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537423739] [2022-02-24 03:44:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:36,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:36,595 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:36,620 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:36,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:36,673 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 03:44:39,248 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:39,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537423739] [2022-02-24 03:44:39,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [537423739] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:39,248 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:39,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:44:39,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614244982] [2022-02-24 03:44:39,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:39,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:44:39,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:44:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:44:39,249 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:40,851 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-02-24 03:44:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:44:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (3), 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 74 [2022-02-24 03:44:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:40,852 INFO L225 Difference]: With dead ends: 88 [2022-02-24 03:44:40,852 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:44:40,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 7 SyntacticMatches, 43 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:44:40,859 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:40,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 124 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:44:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:44:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-02-24 03:44:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 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 03:44:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-02-24 03:44:40,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-02-24 03:44:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:40,868 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-02-24 03:44:40,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:40,868 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-02-24 03:44:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 03:44:40,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:40,869 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:40,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:44:40,869 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:40,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1307754980, now seen corresponding path program 22 times [2022-02-24 03:44:40,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:40,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010670074] [2022-02-24 03:44:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:40,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:40,900 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:40,926 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:41,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:41,007 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 03:44:44,061 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:44,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010670074] [2022-02-24 03:44:44,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2010670074] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:44,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:44,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:44:44,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853681161] [2022-02-24 03:44:44,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:44,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:44:44,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:44:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:44:44,063 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:45,789 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-02-24 03:44:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:44:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2022-02-24 03:44:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:45,790 INFO L225 Difference]: With dead ends: 91 [2022-02-24 03:44:45,790 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 03:44:45,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 7 SyntacticMatches, 45 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:44:45,791 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:45,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 129 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:44:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 03:44:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-02-24 03:44:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-02-24 03:44:45,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-02-24 03:44:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:45,799 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-02-24 03:44:45,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-02-24 03:44:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 03:44:45,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:45,800 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:45,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:44:45,800 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1171954484, now seen corresponding path program 23 times [2022-02-24 03:44:45,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:45,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352575216] [2022-02-24 03:44:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:45,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:45,830 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:45,855 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:45,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:45,927 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 03:44:49,611 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:49,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352575216] [2022-02-24 03:44:49,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [352575216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:49,611 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:49,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:44:49,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326420429] [2022-02-24 03:44:49,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:49,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:44:49,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:49,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:44:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:44:49,612 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:51,698 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-02-24 03:44:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:44:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 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 80 [2022-02-24 03:44:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:51,698 INFO L225 Difference]: With dead ends: 94 [2022-02-24 03:44:51,699 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 03:44:51,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 9 SyntacticMatches, 47 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:44:51,700 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:51,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 134 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:44:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 03:44:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-24 03:44:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 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 03:44:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-02-24 03:44:51,708 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2022-02-24 03:44:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:51,708 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-02-24 03:44:51,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-02-24 03:44:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 03:44:51,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:51,709 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:51,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:44:51,709 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash -759105308, now seen corresponding path program 24 times [2022-02-24 03:44:51,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:51,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239261143] [2022-02-24 03:44:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:51,737 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:51,762 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:44:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:51,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:51,835 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 03:44:57,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:57,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239261143] [2022-02-24 03:44:57,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239261143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:57,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:57,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:44:57,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678403782] [2022-02-24 03:44:57,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:57,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:44:57,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:44:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:44:57,074 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:01,024 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-02-24 03:45:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:45:01,024 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2022-02-24 03:45:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:01,025 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:45:01,025 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 03:45:01,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 7 SyntacticMatches, 49 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:45:01,026 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:01,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 139 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:45:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 03:45:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-02-24 03:45:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 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 03:45:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-02-24 03:45:01,037 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2022-02-24 03:45:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-02-24 03:45:01,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-02-24 03:45:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 03:45:01,038 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:01,038 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:01,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:45:01,038 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1939328460, now seen corresponding path program 25 times [2022-02-24 03:45:01,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:01,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422226036] [2022-02-24 03:45:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:01,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:01,082 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:01,111 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:01,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:01,234 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 03:45:14,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:14,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422226036] [2022-02-24 03:45:14,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [422226036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:14,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:14,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:45:14,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688747141] [2022-02-24 03:45:14,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:14,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:45:14,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:45:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:45:14,448 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:20,647 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-02-24 03:45:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:45:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 2 states have call successors, (3), 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 86 [2022-02-24 03:45:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:20,648 INFO L225 Difference]: With dead ends: 100 [2022-02-24 03:45:20,648 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:45:20,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 7 SyntacticMatches, 51 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=163, Invalid=2917, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:45:20,650 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:20,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 144 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:45:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:45:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-02-24 03:45:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 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 03:45:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-02-24 03:45:20,659 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-02-24 03:45:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:20,659 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-02-24 03:45:20,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-02-24 03:45:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 03:45:20,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:20,660 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:20,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:45:20,660 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:20,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:20,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2076831716, now seen corresponding path program 26 times [2022-02-24 03:45:20,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:20,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603678054] [2022-02-24 03:45:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:20,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:20,689 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:20,720 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:20,844 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 03:45:43,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:43,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603678054] [2022-02-24 03:45:43,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [603678054] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:43,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:43,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:45:43,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576286955] [2022-02-24 03:45:43,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:43,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:45:43,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:45:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:45:43,665 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:51,892 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-02-24 03:45:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:45:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2022-02-24 03:45:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:51,893 INFO L225 Difference]: With dead ends: 103 [2022-02-24 03:45:51,893 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 03:45:51,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 9 SyntacticMatches, 53 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:45:51,894 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:51,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:45:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 03:45:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-02-24 03:45:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 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 03:45:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-02-24 03:45:51,904 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2022-02-24 03:45:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:51,904 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-02-24 03:45:51,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-02-24 03:45:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 03:45:51,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:51,905 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:51,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:45:51,905 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1037530828, now seen corresponding path program 27 times [2022-02-24 03:45:51,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:51,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870867126] [2022-02-24 03:45:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:51,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:51,932 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:51,958 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:52,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:52,064 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 03:46:29,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:29,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870867126] [2022-02-24 03:46:29,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [870867126] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:29,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:29,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:46:29,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241803979] [2022-02-24 03:46:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:29,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:46:29,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:46:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:46:29,284 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:42,634 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-02-24 03:46:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:46:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 2 states have call successors, (3), 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 92 [2022-02-24 03:46:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:42,635 INFO L225 Difference]: With dead ends: 106 [2022-02-24 03:46:42,635 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 03:46:42,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 9 SyntacticMatches, 55 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:46:42,636 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:42,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 154 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:46:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 03:46:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-02-24 03:46:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-02-24 03:46:42,646 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2022-02-24 03:46:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:42,646 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-02-24 03:46:42,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-02-24 03:46:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 03:46:42,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:42,647 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:42,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:46:42,647 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1644013284, now seen corresponding path program 28 times [2022-02-24 03:46:42,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:42,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051092616] [2022-02-24 03:46:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:42,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:42,676 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:42,704 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:42,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:13,639 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:13,639 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051092616] [2022-02-24 03:47:13,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1051092616] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:13,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:13,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 03:47:13,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011458781] [2022-02-24 03:47:13,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:13,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 03:47:13,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:13,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 03:47:13,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:47:13,641 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:21,690 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-02-24 03:47:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:47:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2022-02-24 03:47:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:21,691 INFO L225 Difference]: With dead ends: 109 [2022-02-24 03:47:21,691 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 03:47:21,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 9 SyntacticMatches, 57 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:47:21,693 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:21,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 159 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:47:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 03:47:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-02-24 03:47:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 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 03:47:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-02-24 03:47:21,704 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-02-24 03:47:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:21,704 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-02-24 03:47:21,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-02-24 03:47:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-24 03:47:21,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:21,705 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:21,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:47:21,705 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:21,705 INFO L85 PathProgramCache]: Analyzing trace with hash 435445708, now seen corresponding path program 29 times [2022-02-24 03:47:21,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:21,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681050999] [2022-02-24 03:47:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:21,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:21,732 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:47:21,758 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:47:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:21,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:21,918 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 03:48:06,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:06,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681050999] [2022-02-24 03:48:06,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [681050999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:06,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:06,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:48:06,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637996107] [2022-02-24 03:48:06,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:06,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:48:06,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:48:06,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:48:06,030 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:26,117 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-02-24 03:48:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:48:26,117 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 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 98 [2022-02-24 03:48:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:26,118 INFO L225 Difference]: With dead ends: 112 [2022-02-24 03:48:26,118 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 03:48:26,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 7 SyntacticMatches, 59 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=187, Invalid=3845, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:48:26,119 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:26,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 164 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:48:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 03:48:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-02-24 03:48:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 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 03:48:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-02-24 03:48:26,130 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-02-24 03:48:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:26,130 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-02-24 03:48:26,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-02-24 03:48:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 03:48:26,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:26,131 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:26,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:48:26,131 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash 709631460, now seen corresponding path program 30 times [2022-02-24 03:48:26,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:26,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804484751] [2022-02-24 03:48:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:26,157 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:48:26,183 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:48:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:26,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:26,445 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 03:49:30,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:30,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804484751] [2022-02-24 03:49:30,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [804484751] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:30,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:30,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:49:30,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485181211] [2022-02-24 03:49:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:30,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:49:30,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:49:30,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:49:30,398 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:55,950 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-02-24 03:49:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 03:49:55,951 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 2 states have call successors, (3), 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 101 [2022-02-24 03:49:55,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:55,951 INFO L225 Difference]: With dead ends: 115 [2022-02-24 03:49:55,951 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 03:49:55,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 7 SyntacticMatches, 61 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 88.3s TimeCoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:49:55,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:55,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 169 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:49:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 03:49:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-02-24 03:49:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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 03:49:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-02-24 03:49:55,964 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2022-02-24 03:49:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:55,965 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-02-24 03:49:55,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-02-24 03:49:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 03:49:55,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:55,965 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:55,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:49:55,965 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -50427700, now seen corresponding path program 31 times [2022-02-24 03:49:55,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:55,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387711732] [2022-02-24 03:49:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:55,991 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:49:56,018 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:49:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:56,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:56,252 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 03:51:13,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:13,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387711732] [2022-02-24 03:51:13,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387711732] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:13,526 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:13,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:51:13,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811562532] [2022-02-24 03:51:13,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:13,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:51:13,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:51:13,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:51:13,527 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:42,264 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-02-24 03:51:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:51:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 2 states have call successors, (3), 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 104 [2022-02-24 03:51:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:42,265 INFO L225 Difference]: With dead ends: 118 [2022-02-24 03:51:42,265 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 03:51:42,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 9 SyntacticMatches, 63 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 104.6s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 03:51:42,266 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3297 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:42,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 174 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3297 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:51:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 03:51:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-02-24 03:51:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 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 03:51:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-02-24 03:51:42,278 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-02-24 03:51:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:42,278 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-02-24 03:51:42,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-02-24 03:51:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-24 03:51:42,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:42,279 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:42,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:51:42,279 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash 94721252, now seen corresponding path program 32 times [2022-02-24 03:51:42,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:42,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110654043] [2022-02-24 03:51:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:42,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:42,311 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:51:42,337 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:51:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:42,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:17,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:17,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110654043] [2022-02-24 03:53:17,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1110654043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:17,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:17,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:53:17,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165348059] [2022-02-24 03:53:17,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:17,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:53:17,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:17,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:53:17,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:53:17,073 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:52,020 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-02-24 03:53:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:53:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (3), 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 107 [2022-02-24 03:53:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:52,027 INFO L225 Difference]: With dead ends: 121 [2022-02-24 03:53:52,027 INFO L226 Difference]: Without dead ends: 113 [2022-02-24 03:53:52,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 9 SyntacticMatches, 65 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 128.0s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:53:52,027 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:52,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 179 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:53:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-24 03:53:52,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-02-24 03:53:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 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 03:53:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-02-24 03:53:52,040 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2022-02-24 03:53:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:52,041 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-02-24 03:53:52,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-02-24 03:53:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 03:53:52,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:52,043 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:52,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:53:52,044 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash -804916788, now seen corresponding path program 33 times [2022-02-24 03:53:52,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:52,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763652624] [2022-02-24 03:53:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:52,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:52,076 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:53:52,102 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:53:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:52,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:52,409 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 03:55:29,797 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:29,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763652624] [2022-02-24 03:55:29,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [763652624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:29,797 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:29,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:55:29,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139040391] [2022-02-24 03:55:29,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:29,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:55:29,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:55:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:55:29,798 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:06,664 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-02-24 03:56:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:56:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-02-24 03:56:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:06,665 INFO L225 Difference]: With dead ends: 124 [2022-02-24 03:56:06,665 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 03:56:06,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 7 SyntacticMatches, 67 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 132.9s TimeCoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:56:06,666 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3707 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:06,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 184 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3707 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:56:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 03:56:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-02-24 03:56:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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 03:56:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-02-24 03:56:06,679 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-02-24 03:56:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:06,680 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-02-24 03:56:06,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-02-24 03:56:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 03:56:06,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:06,680 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:06,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:56:06,681 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1325839388, now seen corresponding path program 34 times [2022-02-24 03:56:06,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:06,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901506326] [2022-02-24 03:56:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:06,711 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:56:06,737 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:56:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:07,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:07,082 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 03:58:08,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:58:08,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901506326] [2022-02-24 03:58:08,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1901506326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:58:08,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:58:08,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 03:58:08,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793312535] [2022-02-24 03:58:08,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:58:08,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 03:58:08,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:58:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 03:58:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:58:08,515 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)