/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:11:44,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:11:44,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:11:44,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:11:44,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:11:44,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:11:44,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:11:44,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:11:44,565 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:11:44,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:11:44,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:11:44,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:11:44,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:11:44,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:11:44,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:11:44,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:11:44,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:11:44,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:11:44,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:11:44,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:44,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:11:44,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:11:44,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:11:44,569 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:11:44,569 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:11:44,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:11:44,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:11:44,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:11:44,748 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:11:44,748 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:11:44,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-15 01:11:44,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0fecd4d8/50010bea6bce4bf3858517bd23b82cb2/FLAG7ad22cce9 [2022-02-15 01:11:45,097 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:11:45,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-02-15 01:11:45,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0fecd4d8/50010bea6bce4bf3858517bd23b82cb2/FLAG7ad22cce9 [2022-02-15 01:11:45,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0fecd4d8/50010bea6bce4bf3858517bd23b82cb2 [2022-02-15 01:11:45,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:11:45,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:11:45,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:45,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:11:45,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:11:45,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4122af9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45, skipping insertion in model container [2022-02-15 01:11:45,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:11:45,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:11:45,677 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/insertion_sort-2.c[328,341] [2022-02-15 01:11:45,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:45,719 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:11:45,731 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/insertion_sort-2.c[328,341] [2022-02-15 01:11:45,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:45,756 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:11:45,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45 WrapperNode [2022-02-15 01:11:45,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:45,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:11:45,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:11:45,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:11:45,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:11:45,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:11:45,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:11:45,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:11:45,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (1/1) ... [2022-02-15 01:11:45,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:45,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:11:45,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:11:45,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:11:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:11:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:11:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:11:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:11:45,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:11:45,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:11:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:11:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:11:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:11:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:11:45,929 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:11:45,931 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:11:46,041 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:11:46,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:11:46,045 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-15 01:11:46,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:46 BoogieIcfgContainer [2022-02-15 01:11:46,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:11:46,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:11:46,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:11:46,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:11:46,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:11:45" (1/3) ... [2022-02-15 01:11:46,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e557cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:46, skipping insertion in model container [2022-02-15 01:11:46,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:45" (2/3) ... [2022-02-15 01:11:46,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e557cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:46, skipping insertion in model container [2022-02-15 01:11:46,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:46" (3/3) ... [2022-02-15 01:11:46,054 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2022-02-15 01:11:46,057 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:11:46,058 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:11:46,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:11:46,091 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=JORDAN [2022-02-15 01:11:46,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:11:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-02-15 01:11:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:11:46,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,107 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,108 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1914549692, now seen corresponding path program 1 times [2022-02-15 01:11:46,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000278081] [2022-02-15 01:11:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,162 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000278081] [2022-02-15 01:11:46,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000278081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,248 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:11:46,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645127182] [2022-02-15 01:11:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:11:46,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:11:46,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:11:46,295 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:46,353 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-02-15 01:11:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:11:46,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-02-15 01:11:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:46,373 INFO L225 Difference]: With dead ends: 54 [2022-02-15 01:11:46,373 INFO L226 Difference]: Without dead ends: 26 [2022-02-15 01:11:46,376 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 [2022-02-15 01:11:46,378 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-02-15 01:11:46,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-15 01:11:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-15 01:11:46,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:46,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-02-15 01:11:46,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-02-15 01:11:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:46,411 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-02-15 01:11:46,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-02-15 01:11:46,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:11:46,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:11:46,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,413 INFO L85 PathProgramCache]: Analyzing trace with hash 314290466, now seen corresponding path program 1 times [2022-02-15 01:11:46,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785361913] [2022-02-15 01:11:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,416 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785361913] [2022-02-15 01:11:46,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785361913] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,566 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:11:46,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78259960] [2022-02-15 01:11:46,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:11:46,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:11:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:46,568 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:46,686 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-02-15 01:11:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:11:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-02-15 01:11:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:46,687 INFO L225 Difference]: With dead ends: 49 [2022-02-15 01:11:46,687 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 01:11:46,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:11:46,689 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:46,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:46,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 01:11:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-15 01:11:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-15 01:11:46,696 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-02-15 01:11:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:46,697 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-15 01:11:46,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-15 01:11:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:11:46,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:11:46,698 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash 408725728, now seen corresponding path program 1 times [2022-02-15 01:11:46,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842254595] [2022-02-15 01:11:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,738 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:46,738 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,740 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,898 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842254595] [2022-02-15 01:11:46,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842254595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,898 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:46,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759674417] [2022-02-15 01:11:46,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:46,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:46,900 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2022-02-15 01:11:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,071 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-02-15 01:11:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:47,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 [2022-02-15 01:11:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,073 INFO L225 Difference]: With dead ends: 49 [2022-02-15 01:11:47,073 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:11:47,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:47,078 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 41 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:11:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-15 01:11:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-02-15 01:11:47,089 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-02-15 01:11:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,089 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-02-15 01:11:47,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2022-02-15 01:11:47,089 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-02-15 01:11:47,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:11:47,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:47,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:11:47,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash 966699294, now seen corresponding path program 2 times [2022-02-15 01:11:47,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628898331] [2022-02-15 01:11:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,096 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,099 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,247 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628898331] [2022-02-15 01:11:47,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628898331] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,247 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:47,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650881385] [2022-02-15 01:11:47,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:47,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:47,250 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,461 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-02-15 01:11:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:47,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:11:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,464 INFO L225 Difference]: With dead ends: 58 [2022-02-15 01:11:47,464 INFO L226 Difference]: Without dead ends: 47 [2022-02-15 01:11:47,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:11:47,472 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 44 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-15 01:11:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-02-15 01:11:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-15 01:11:47,488 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2022-02-15 01:11:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,488 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-15 01:11:47,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-15 01:11:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:47,489 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:47,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:11:47,490 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1080556849, now seen corresponding path program 1 times [2022-02-15 01:11:47,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641961260] [2022-02-15 01:11:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,495 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,495 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,496 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,849 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641961260] [2022-02-15 01:11:47,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [641961260] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:11:47,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669068870] [2022-02-15 01:11:47,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:11:47,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:11:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:47,851 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,281 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-02-15 01:11:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:11:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 01:11:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,283 INFO L225 Difference]: With dead ends: 65 [2022-02-15 01:11:48,283 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 01:11:48,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:11:48,284 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 60 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 01:11:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 44. [2022-02-15 01:11:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-02-15 01:11:48,296 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-02-15 01:11:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,296 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-02-15 01:11:48,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-02-15 01:11:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:48,297 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:48,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:11:48,297 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1781621427, now seen corresponding path program 1 times [2022-02-15 01:11:48,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121333620] [2022-02-15 01:11:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,299 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,300 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:48,335 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:48,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121333620] [2022-02-15 01:11:48,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [121333620] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:48,335 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:48,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:11:48,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187393313] [2022-02-15 01:11:48,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:48,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:11:48,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:11:48,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:11:48,336 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2022-02-15 01:11:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,404 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-02-15 01:11:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:11:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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 25 [2022-02-15 01:11:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,406 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:11:48,406 INFO L226 Difference]: Without dead ends: 51 [2022-02-15 01:11:48,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:48,407 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 35 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-15 01:11:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-02-15 01:11:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-02-15 01:11:48,418 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-02-15 01:11:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,418 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-02-15 01:11:48,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 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) [2022-02-15 01:11:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-02-15 01:11:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:11:48,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:48,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:11:48,419 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1755898038, now seen corresponding path program 1 times [2022-02-15 01:11:48,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407283331] [2022-02-15 01:11:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,422 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,422 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:48,734 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:48,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407283331] [2022-02-15 01:11:48,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [407283331] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:48,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:48,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:11:48,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161828997] [2022-02-15 01:11:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:48,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:11:48,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:11:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:11:48,736 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,197 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-02-15 01:11:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:11:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:11:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,198 INFO L225 Difference]: With dead ends: 111 [2022-02-15 01:11:49,198 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:11:49,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:11:49,199 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:11:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2022-02-15 01:11:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-02-15 01:11:49,216 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2022-02-15 01:11:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,217 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-02-15 01:11:49,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-02-15 01:11:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:11:49,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:11:49,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,221 INFO L85 PathProgramCache]: Analyzing trace with hash -990333180, now seen corresponding path program 2 times [2022-02-15 01:11:49,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252257594] [2022-02-15 01:11:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,224 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,225 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,332 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252257594] [2022-02-15 01:11:49,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252257594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:49,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114893727] [2022-02-15 01:11:49,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:49,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:49,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:49,337 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,555 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2022-02-15 01:11:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 01:11:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,557 INFO L225 Difference]: With dead ends: 125 [2022-02-15 01:11:49,557 INFO L226 Difference]: Without dead ends: 91 [2022-02-15 01:11:49,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:11:49,558 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 60 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-15 01:11:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-02-15 01:11:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-02-15 01:11:49,592 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 31 [2022-02-15 01:11:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,593 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-02-15 01:11:49,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-02-15 01:11:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:11:49,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:11:49,596 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -405243253, now seen corresponding path program 1 times [2022-02-15 01:11:49,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133898747] [2022-02-15 01:11:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,599 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,600 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-15 01:11:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,692 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133898747] [2022-02-15 01:11:49,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133898747] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,693 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:49,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141723922] [2022-02-15 01:11:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:49,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:49,694 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,899 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-02-15 01:11:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:11:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-15 01:11:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,900 INFO L225 Difference]: With dead ends: 100 [2022-02-15 01:11:49,900 INFO L226 Difference]: Without dead ends: 73 [2022-02-15 01:11:49,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:49,901 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 48 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-15 01:11:49,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-02-15 01:11:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-02-15 01:11:49,916 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 33 [2022-02-15 01:11:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,916 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-02-15 01:11:49,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-02-15 01:11:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:11:49,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:11:49,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1306424002, now seen corresponding path program 3 times [2022-02-15 01:11:49,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937620143] [2022-02-15 01:11:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,919 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,919 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,920 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:50,187 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:50,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937620143] [2022-02-15 01:11:50,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1937620143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:50,187 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:50,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:11:50,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472540591] [2022-02-15 01:11:50,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:50,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:11:50,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:50,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:11:50,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:11:50,189 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:50,867 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2022-02-15 01:11:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:11:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 01:11:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:50,869 INFO L225 Difference]: With dead ends: 135 [2022-02-15 01:11:50,869 INFO L226 Difference]: Without dead ends: 101 [2022-02-15 01:11:50,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:11:50,872 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 109 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:50,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 51 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-15 01:11:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2022-02-15 01:11:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 64 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-02-15 01:11:50,899 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 33 [2022-02-15 01:11:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:50,901 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-02-15 01:11:50,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-02-15 01:11:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:11:50,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:50,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:50,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:11:50,903 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -350564349, now seen corresponding path program 1 times [2022-02-15 01:11:50,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:50,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367106656] [2022-02-15 01:11:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:50,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:50,906 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:50,908 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:51,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:51,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:51,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367106656] [2022-02-15 01:11:51,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [367106656] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:51,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:51,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:11:51,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473542664] [2022-02-15 01:11:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:51,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:11:51,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:11:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:11:51,128 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:51,860 INFO L93 Difference]: Finished difference Result 179 states and 227 transitions. [2022-02-15 01:11:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:11:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:11:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:51,863 INFO L225 Difference]: With dead ends: 179 [2022-02-15 01:11:51,863 INFO L226 Difference]: Without dead ends: 177 [2022-02-15 01:11:51,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:11:51,864 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 199 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:51,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 52 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-15 01:11:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 86. [2022-02-15 01:11:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 79 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2022-02-15 01:11:51,908 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 36 [2022-02-15 01:11:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:51,908 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2022-02-15 01:11:51,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:51,908 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2022-02-15 01:11:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:11:51,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:51,908 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:51,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:11:51,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:51,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1169352267, now seen corresponding path program 2 times [2022-02-15 01:11:51,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:51,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966222707] [2022-02-15 01:11:51,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:51,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:51,911 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:51,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:51,913 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:52,393 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:52,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966222707] [2022-02-15 01:11:52,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [966222707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:52,393 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:52,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:11:52,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906870267] [2022-02-15 01:11:52,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:52,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:11:52,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:11:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:11:52,395 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:53,505 INFO L93 Difference]: Finished difference Result 211 states and 272 transitions. [2022-02-15 01:11:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:11:53,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:11:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:53,507 INFO L225 Difference]: With dead ends: 211 [2022-02-15 01:11:53,507 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:11:53,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:11:53,511 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:53,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 83 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:11:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:11:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 97. [2022-02-15 01:11:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 90 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-02-15 01:11:53,542 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 36 [2022-02-15 01:11:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:53,542 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-02-15 01:11:53,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-02-15 01:11:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:11:53,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:53,543 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:53,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:11:53,543 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1631396062, now seen corresponding path program 2 times [2022-02-15 01:11:53,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:53,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566853818] [2022-02-15 01:11:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:53,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:53,546 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:53,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:53,547 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:53,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:53,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:53,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566853818] [2022-02-15 01:11:53,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566853818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:53,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:53,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:53,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284215284] [2022-02-15 01:11:53,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:53,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:53,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:53,597 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2022-02-15 01:11:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:53,864 INFO L93 Difference]: Finished difference Result 172 states and 219 transitions. [2022-02-15 01:11:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:11:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 39 [2022-02-15 01:11:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:53,865 INFO L225 Difference]: With dead ends: 172 [2022-02-15 01:11:53,865 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:11:53,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:11:53,866 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:53,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:11:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 74. [2022-02-15 01:11:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-02-15 01:11:53,917 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 39 [2022-02-15 01:11:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:53,917 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-02-15 01:11:53,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2022-02-15 01:11:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-02-15 01:11:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:11:53,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:53,918 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:53,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:11:53,918 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash -930331484, now seen corresponding path program 3 times [2022-02-15 01:11:53,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:53,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165170238] [2022-02-15 01:11:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:53,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:53,920 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:53,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:53,921 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:54,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:54,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165170238] [2022-02-15 01:11:54,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [165170238] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:54,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:54,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:11:54,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497916071] [2022-02-15 01:11:54,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:54,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:11:54,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:11:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:11:54,257 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:55,176 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-02-15 01:11:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:11:55,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-15 01:11:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:55,177 INFO L225 Difference]: With dead ends: 131 [2022-02-15 01:11:55,177 INFO L226 Difference]: Without dead ends: 129 [2022-02-15 01:11:55,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:11:55,178 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:55,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 57 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-15 01:11:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 74. [2022-02-15 01:11:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-02-15 01:11:55,200 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 39 [2022-02-15 01:11:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:55,200 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-02-15 01:11:55,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-02-15 01:11:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:11:55,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:55,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:55,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:11:55,201 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:55,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1624035100, now seen corresponding path program 2 times [2022-02-15 01:11:55,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:55,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855914726] [2022-02-15 01:11:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:55,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:55,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:55,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:55,204 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:55,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:55,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:11:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:55,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:55,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855914726] [2022-02-15 01:11:55,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [855914726] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:55,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:55,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:11:55,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978926963] [2022-02-15 01:11:55,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:55,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:11:55,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:55,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:11:55,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:11:55,407 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:55,930 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2022-02-15 01:11:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:11:55,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-15 01:11:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:55,932 INFO L225 Difference]: With dead ends: 114 [2022-02-15 01:11:55,932 INFO L226 Difference]: Without dead ends: 112 [2022-02-15 01:11:55,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:11:55,933 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 130 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:55,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 78 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-15 01:11:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2022-02-15 01:11:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 84 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2022-02-15 01:11:55,963 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 41 [2022-02-15 01:11:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:55,963 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2022-02-15 01:11:55,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2022-02-15 01:11:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:11:55,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:55,965 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:55,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:11:55,965 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1436661232, now seen corresponding path program 3 times [2022-02-15 01:11:55,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:55,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405634970] [2022-02-15 01:11:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:55,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:55,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:55,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:55,970 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:56,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:56,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405634970] [2022-02-15 01:11:56,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [405634970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:56,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:56,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:11:56,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242923645] [2022-02-15 01:11:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:56,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:11:56,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:56,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:11:56,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:11:56,081 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:56,446 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-02-15 01:11:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:11:56,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:11:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:56,447 INFO L225 Difference]: With dead ends: 184 [2022-02-15 01:11:56,447 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:11:56,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:11:56,448 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 147 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:56,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 76 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:11:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-02-15 01:11:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-02-15 01:11:56,509 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 42 [2022-02-15 01:11:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:56,510 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-02-15 01:11:56,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-02-15 01:11:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:11:56,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:56,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:56,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:11:56,511 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2084807843, now seen corresponding path program 1 times [2022-02-15 01:11:56,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:56,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435705481] [2022-02-15 01:11:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:56,512 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:56,512 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:56,513 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-15 01:11:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:56,655 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:56,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435705481] [2022-02-15 01:11:56,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1435705481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:56,655 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:56,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:11:56,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328776888] [2022-02-15 01:11:56,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:56,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:11:56,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:11:56,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:11:56,656 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:57,173 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2022-02-15 01:11:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:11:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-02-15 01:11:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:57,175 INFO L225 Difference]: With dead ends: 158 [2022-02-15 01:11:57,175 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 01:11:57,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:11:57,175 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 105 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:57,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 92 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 01:11:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2022-02-15 01:11:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.2162162162162162) internal successors, (135), 113 states have internal predecessors, (135), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-02-15 01:11:57,229 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 44 [2022-02-15 01:11:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:57,229 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-02-15 01:11:57,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-02-15 01:11:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:11:57,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:57,231 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:57,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:11:57,231 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1979815022, now seen corresponding path program 4 times [2022-02-15 01:11:57,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:57,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467835963] [2022-02-15 01:11:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:57,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:57,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:57,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:57,235 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:57,728 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:57,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467835963] [2022-02-15 01:11:57,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [467835963] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:57,729 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:57,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:11:57,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56182095] [2022-02-15 01:11:57,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:57,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:11:57,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:57,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:11:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:11:57,730 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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) [2022-02-15 01:11:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:58,559 INFO L93 Difference]: Finished difference Result 210 states and 257 transitions. [2022-02-15 01:11:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:11:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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 [2022-02-15 01:11:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:58,561 INFO L225 Difference]: With dead ends: 210 [2022-02-15 01:11:58,561 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 01:11:58,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:11:58,562 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 153 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:58,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 58 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:11:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 01:11:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 133. [2022-02-15 01:11:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.2377049180327868) internal successors, (151), 124 states have internal predecessors, (151), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:11:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2022-02-15 01:11:58,632 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 44 [2022-02-15 01:11:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:58,632 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2022-02-15 01:11:58,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 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) [2022-02-15 01:11:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2022-02-15 01:11:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:11:58,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:58,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:58,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:11:58,633 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1128449496, now seen corresponding path program 5 times [2022-02-15 01:11:58,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:58,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808898983] [2022-02-15 01:11:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:58,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:58,635 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:58,636 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:58,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:58,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808898983] [2022-02-15 01:11:58,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808898983] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:58,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:58,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:11:58,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556238858] [2022-02-15 01:11:58,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:58,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:11:58,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:11:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:11:58,964 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:59,896 INFO L93 Difference]: Finished difference Result 209 states and 254 transitions. [2022-02-15 01:11:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:11:59,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:11:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:59,897 INFO L225 Difference]: With dead ends: 209 [2022-02-15 01:11:59,897 INFO L226 Difference]: Without dead ends: 207 [2022-02-15 01:11:59,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:11:59,898 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 214 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:59,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 57 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:11:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-15 01:11:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 153. [2022-02-15 01:11:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.2357142857142858) internal successors, (173), 143 states have internal predecessors, (173), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:11:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 186 transitions. [2022-02-15 01:11:59,965 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 186 transitions. Word has length 44 [2022-02-15 01:11:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:59,965 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 186 transitions. [2022-02-15 01:11:59,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 186 transitions. [2022-02-15 01:11:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:11:59,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:59,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:59,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:11:59,967 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash -459898406, now seen corresponding path program 4 times [2022-02-15 01:11:59,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:59,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133116413] [2022-02-15 01:11:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:59,970 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:59,970 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:59,971 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:00,016 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:00,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133116413] [2022-02-15 01:12:00,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133116413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:00,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:00,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:12:00,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414319345] [2022-02-15 01:12:00,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:00,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:12:00,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:12:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:12:00,018 INFO L87 Difference]: Start difference. First operand 153 states and 186 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2022-02-15 01:12:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:00,239 INFO L93 Difference]: Finished difference Result 253 states and 313 transitions. [2022-02-15 01:12:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:12:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 44 [2022-02-15 01:12:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:00,241 INFO L225 Difference]: With dead ends: 253 [2022-02-15 01:12:00,241 INFO L226 Difference]: Without dead ends: 180 [2022-02-15 01:12:00,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:12:00,243 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:00,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 51 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:00,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-15 01:12:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 152. [2022-02-15 01:12:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 142 states have internal predecessors, (164), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:12:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2022-02-15 01:12:00,361 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 44 [2022-02-15 01:12:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:00,362 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2022-02-15 01:12:00,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2022-02-15 01:12:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2022-02-15 01:12:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:12:00,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:00,362 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:00,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:12:00,363 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash -172816864, now seen corresponding path program 5 times [2022-02-15 01:12:00,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:00,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905828696] [2022-02-15 01:12:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:00,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:00,365 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:00,365 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:00,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:00,857 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:00,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905828696] [2022-02-15 01:12:00,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [905828696] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:00,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:00,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:12:00,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300104919] [2022-02-15 01:12:00,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:12:00,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:12:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:00,858 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2022-02-15 01:12:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:01,887 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-02-15 01:12:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:12:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 [2022-02-15 01:12:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:01,889 INFO L225 Difference]: With dead ends: 241 [2022-02-15 01:12:01,889 INFO L226 Difference]: Without dead ends: 239 [2022-02-15 01:12:01,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=2133, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:12:01,890 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:01,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 90 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:01,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-15 01:12:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 161. [2022-02-15 01:12:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 151 states have internal predecessors, (175), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:12:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2022-02-15 01:12:01,953 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 44 [2022-02-15 01:12:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:01,953 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2022-02-15 01:12:01,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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) [2022-02-15 01:12:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2022-02-15 01:12:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:01,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:01,953 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:01,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:12:01,954 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1585209602, now seen corresponding path program 1 times [2022-02-15 01:12:01,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:01,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015449481] [2022-02-15 01:12:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:01,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:01,955 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:01,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:01,956 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:02,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:02,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-15 01:12:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:02,410 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:02,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015449481] [2022-02-15 01:12:02,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015449481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:02,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:02,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:12:02,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200778735] [2022-02-15 01:12:02,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:12:02,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:12:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:12:02,411 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:03,907 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2022-02-15 01:12:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:12:03,907 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-02-15 01:12:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:03,908 INFO L225 Difference]: With dead ends: 241 [2022-02-15 01:12:03,908 INFO L226 Difference]: Without dead ends: 239 [2022-02-15 01:12:03,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=585, Invalid=3575, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:12:03,910 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 209 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:03,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 63 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:03,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-15 01:12:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2022-02-15 01:12:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 163 states have (on average 1.1840490797546013) internal successors, (193), 166 states have internal predecessors, (193), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:12:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 206 transitions. [2022-02-15 01:12:03,988 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 206 transitions. Word has length 47 [2022-02-15 01:12:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:03,988 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 206 transitions. [2022-02-15 01:12:03,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 206 transitions. [2022-02-15 01:12:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:12:03,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:03,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:03,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:12:03,989 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1571697014, now seen corresponding path program 3 times [2022-02-15 01:12:03,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:03,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121614671] [2022-02-15 01:12:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:03,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:03,991 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:03,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:03,992 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:04,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:04,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-02-15 01:12:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:12:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:04,116 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:04,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121614671] [2022-02-15 01:12:04,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1121614671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:04,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:04,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:12:04,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412967874] [2022-02-15 01:12:04,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:04,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:12:04,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:12:04,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:12:04,117 INFO L87 Difference]: Start difference. First operand 176 states and 206 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:04,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:04,449 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-02-15 01:12:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:12:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2022-02-15 01:12:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:04,450 INFO L225 Difference]: With dead ends: 217 [2022-02-15 01:12:04,450 INFO L226 Difference]: Without dead ends: 172 [2022-02-15 01:12:04,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:12:04,451 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:04,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 66 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-15 01:12:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2022-02-15 01:12:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.148936170212766) internal successors, (162), 144 states have internal predecessors, (162), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-02-15 01:12:04,512 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 49 [2022-02-15 01:12:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:04,513 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-02-15 01:12:04,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-02-15 01:12:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:04,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:04,513 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:04,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:12:04,513 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:04,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1212783309, now seen corresponding path program 6 times [2022-02-15 01:12:04,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:04,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172218104] [2022-02-15 01:12:04,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:04,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:04,515 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:04,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:04,516 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:04,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:05,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:05,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172218104] [2022-02-15 01:12:05,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [172218104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:05,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:05,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:12:05,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248397461] [2022-02-15 01:12:05,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:05,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:12:05,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:12:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:05,003 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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) [2022-02-15 01:12:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:06,659 INFO L93 Difference]: Finished difference Result 259 states and 305 transitions. [2022-02-15 01:12:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:12:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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 [2022-02-15 01:12:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:06,663 INFO L225 Difference]: With dead ends: 259 [2022-02-15 01:12:06,664 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 01:12:06,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=740, Invalid=4230, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:12:06,667 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 297 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:06,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 73 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:06,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 01:12:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 164. [2022-02-15 01:12:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 155 states have internal predecessors, (177), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2022-02-15 01:12:06,770 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 47 [2022-02-15 01:12:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:06,770 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2022-02-15 01:12:06,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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) [2022-02-15 01:12:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2022-02-15 01:12:06,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:06,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:06,775 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:06,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:12:06,775 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -511718731, now seen corresponding path program 6 times [2022-02-15 01:12:06,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:06,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720585698] [2022-02-15 01:12:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:06,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:06,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:06,778 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:06,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:06,863 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:06,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720585698] [2022-02-15 01:12:06,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720585698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:06,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:06,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:12:06,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386438207] [2022-02-15 01:12:06,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:06,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:12:06,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:12:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:12:06,865 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-02-15 01:12:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:07,201 INFO L93 Difference]: Finished difference Result 237 states and 284 transitions. [2022-02-15 01:12:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:12:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 47 [2022-02-15 01:12:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:07,202 INFO L225 Difference]: With dead ends: 237 [2022-02-15 01:12:07,202 INFO L226 Difference]: Without dead ends: 214 [2022-02-15 01:12:07,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:07,203 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:07,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 53 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-15 01:12:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 170. [2022-02-15 01:12:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 161 states have internal predecessors, (185), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2022-02-15 01:12:07,288 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 47 [2022-02-15 01:12:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:07,288 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2022-02-15 01:12:07,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-02-15 01:12:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2022-02-15 01:12:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:07,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:07,289 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:07,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:12:07,289 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1895537965, now seen corresponding path program 7 times [2022-02-15 01:12:07,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:07,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579317276] [2022-02-15 01:12:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:07,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:07,291 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:07,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:07,291 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:07,777 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:07,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579317276] [2022-02-15 01:12:07,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [579317276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:07,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:07,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:12:07,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909784257] [2022-02-15 01:12:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:07,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:12:07,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:12:07,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:07,779 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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) [2022-02-15 01:12:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:09,016 INFO L93 Difference]: Finished difference Result 262 states and 307 transitions. [2022-02-15 01:12:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:12:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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 [2022-02-15 01:12:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:09,017 INFO L225 Difference]: With dead ends: 262 [2022-02-15 01:12:09,017 INFO L226 Difference]: Without dead ends: 223 [2022-02-15 01:12:09,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=487, Invalid=2935, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:12:09,018 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 144 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:09,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 83 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-02-15 01:12:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 178. [2022-02-15 01:12:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 169 states have internal predecessors, (195), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2022-02-15 01:12:09,103 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 47 [2022-02-15 01:12:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:09,103 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2022-02-15 01:12:09,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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) [2022-02-15 01:12:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2022-02-15 01:12:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:09,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:09,104 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:09,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:12:09,104 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:09,105 INFO L85 PathProgramCache]: Analyzing trace with hash -879512715, now seen corresponding path program 7 times [2022-02-15 01:12:09,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:09,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593591572] [2022-02-15 01:12:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:09,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:09,106 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:09,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:09,107 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:09,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:09,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593591572] [2022-02-15 01:12:09,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1593591572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:09,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:09,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:12:09,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741647493] [2022-02-15 01:12:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:09,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:12:09,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:09,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:12:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:12:09,438 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:10,256 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2022-02-15 01:12:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:12:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 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 [2022-02-15 01:12:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:10,257 INFO L225 Difference]: With dead ends: 210 [2022-02-15 01:12:10,258 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 01:12:10,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:12:10,259 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:10,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 71 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 01:12:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 169. [2022-02-15 01:12:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 158 states have (on average 1.1708860759493671) internal successors, (185), 160 states have internal predecessors, (185), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:12:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 195 transitions. [2022-02-15 01:12:10,336 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 195 transitions. Word has length 47 [2022-02-15 01:12:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:10,336 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 195 transitions. [2022-02-15 01:12:10,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 195 transitions. [2022-02-15 01:12:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:10,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:10,337 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:10,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:12:10,337 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:10,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2050746395, now seen corresponding path program 8 times [2022-02-15 01:12:10,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:10,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048196040] [2022-02-15 01:12:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:10,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:10,338 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:10,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:10,339 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:10,777 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:10,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048196040] [2022-02-15 01:12:10,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048196040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:10,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:10,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:12:10,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763162270] [2022-02-15 01:12:10,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:10,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:12:10,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:12:10,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:10,778 INFO L87 Difference]: Start difference. First operand 169 states and 195 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2022-02-15 01:12:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:11,588 INFO L93 Difference]: Finished difference Result 227 states and 264 transitions. [2022-02-15 01:12:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:12:11,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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 [2022-02-15 01:12:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:11,590 INFO L225 Difference]: With dead ends: 227 [2022-02-15 01:12:11,590 INFO L226 Difference]: Without dead ends: 225 [2022-02-15 01:12:11,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:12:11,591 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:11,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 78 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-15 01:12:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 181. [2022-02-15 01:12:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 170 states have (on average 1.1823529411764706) internal successors, (201), 172 states have internal predecessors, (201), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:12:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 211 transitions. [2022-02-15 01:12:11,676 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 211 transitions. Word has length 47 [2022-02-15 01:12:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:11,676 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 211 transitions. [2022-02-15 01:12:11,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2022-02-15 01:12:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 211 transitions. [2022-02-15 01:12:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:12:11,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:11,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:11,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:12:11,677 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash 183964909, now seen corresponding path program 4 times [2022-02-15 01:12:11,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:11,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164292485] [2022-02-15 01:12:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:11,680 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:11,680 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:11,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:11,681 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:11,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:11,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:12:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:11,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:11,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164292485] [2022-02-15 01:12:11,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [164292485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:11,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:11,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:12:11,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479518246] [2022-02-15 01:12:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:11,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:12:11,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:12:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:12:11,900 INFO L87 Difference]: Start difference. First operand 181 states and 211 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:12,523 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2022-02-15 01:12:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:12:12,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 01:12:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:12,524 INFO L225 Difference]: With dead ends: 221 [2022-02-15 01:12:12,524 INFO L226 Difference]: Without dead ends: 219 [2022-02-15 01:12:12,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:12:12,525 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 128 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:12,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 82 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-15 01:12:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 204. [2022-02-15 01:12:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 190 states have (on average 1.1842105263157894) internal successors, (225), 193 states have internal predecessors, (225), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-15 01:12:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 239 transitions. [2022-02-15 01:12:12,625 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 239 transitions. Word has length 49 [2022-02-15 01:12:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:12,625 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 239 transitions. [2022-02-15 01:12:12,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 239 transitions. [2022-02-15 01:12:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:12:12,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:12,626 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:12,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:12:12,626 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash -42029369, now seen corresponding path program 2 times [2022-02-15 01:12:12,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:12,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275735346] [2022-02-15 01:12:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:12,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:12,628 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:12,628 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-02-15 01:12:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:13,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:13,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275735346] [2022-02-15 01:12:13,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [275735346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:13,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:13,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:12:13,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231013119] [2022-02-15 01:12:13,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:13,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:12:13,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:13,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:12:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:13,261 INFO L87 Difference]: Start difference. First operand 204 states and 239 transitions. Second operand has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:14,356 INFO L93 Difference]: Finished difference Result 226 states and 264 transitions. [2022-02-15 01:12:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:12:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-02-15 01:12:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:14,357 INFO L225 Difference]: With dead ends: 226 [2022-02-15 01:12:14,357 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 01:12:14,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=485, Invalid=3297, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:12:14,358 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 128 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:14,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 78 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 01:12:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2022-02-15 01:12:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 150 states have (on average 1.2133333333333334) internal successors, (182), 152 states have internal predecessors, (182), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 193 transitions. [2022-02-15 01:12:14,453 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 193 transitions. Word has length 50 [2022-02-15 01:12:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:14,454 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 193 transitions. [2022-02-15 01:12:14,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 193 transitions. [2022-02-15 01:12:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:12:14,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:14,454 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:14,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:12:14,454 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1165803103, now seen corresponding path program 8 times [2022-02-15 01:12:14,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:14,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15477813] [2022-02-15 01:12:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:14,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:14,456 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:14,457 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:14,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:14,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:14,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15477813] [2022-02-15 01:12:14,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [15477813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:14,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:14,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:12:14,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373325635] [2022-02-15 01:12:14,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:14,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:12:14,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:12:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:12:14,608 INFO L87 Difference]: Start difference. First operand 161 states and 193 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:15,078 INFO L93 Difference]: Finished difference Result 394 states and 481 transitions. [2022-02-15 01:12:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:12:15,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 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 [2022-02-15 01:12:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:15,080 INFO L225 Difference]: With dead ends: 394 [2022-02-15 01:12:15,080 INFO L226 Difference]: Without dead ends: 323 [2022-02-15 01:12:15,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:12:15,081 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 206 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:15,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 66 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-15 01:12:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 230. [2022-02-15 01:12:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 219 states have (on average 1.2054794520547945) internal successors, (264), 221 states have internal predecessors, (264), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2022-02-15 01:12:15,220 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 50 [2022-02-15 01:12:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:15,220 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2022-02-15 01:12:15,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2022-02-15 01:12:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:12:15,221 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:15,221 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:15,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:12:15,221 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash 904028532, now seen corresponding path program 9 times [2022-02-15 01:12:15,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:15,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847682702] [2022-02-15 01:12:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:15,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:15,224 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:15,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:15,225 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:15,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:15,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847682702] [2022-02-15 01:12:15,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1847682702] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:15,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:15,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:12:15,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362693355] [2022-02-15 01:12:15,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:15,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:12:15,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:12:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:12:15,516 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:16,655 INFO L93 Difference]: Finished difference Result 365 states and 439 transitions. [2022-02-15 01:12:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:12:16,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 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 [2022-02-15 01:12:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:16,657 INFO L225 Difference]: With dead ends: 365 [2022-02-15 01:12:16,657 INFO L226 Difference]: Without dead ends: 316 [2022-02-15 01:12:16,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=708, Invalid=2832, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:12:16,659 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 179 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:16,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 95 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-15 01:12:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 222. [2022-02-15 01:12:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 211 states have (on average 1.1895734597156398) internal successors, (251), 213 states have internal predecessors, (251), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 262 transitions. [2022-02-15 01:12:16,783 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 262 transitions. Word has length 50 [2022-02-15 01:12:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:16,783 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 262 transitions. [2022-02-15 01:12:16,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 262 transitions. [2022-02-15 01:12:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:12:16,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:16,784 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:16,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:12:16,784 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1297158544, now seen corresponding path program 10 times [2022-02-15 01:12:16,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:16,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730332968] [2022-02-15 01:12:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:16,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:16,785 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:16,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:16,786 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:17,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:17,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730332968] [2022-02-15 01:12:17,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730332968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:17,414 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:17,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:12:17,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350383784] [2022-02-15 01:12:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:17,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:12:17,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:12:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:17,415 INFO L87 Difference]: Start difference. First operand 222 states and 262 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2022-02-15 01:12:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:18,793 INFO L93 Difference]: Finished difference Result 286 states and 334 transitions. [2022-02-15 01:12:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:12:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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 [2022-02-15 01:12:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:18,795 INFO L225 Difference]: With dead ends: 286 [2022-02-15 01:12:18,795 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:12:18,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=431, Invalid=2991, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:12:18,797 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 161 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:18,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 82 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:12:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 222. [2022-02-15 01:12:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 211 states have (on average 1.1943127962085307) internal successors, (252), 213 states have internal predecessors, (252), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 01:12:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 263 transitions. [2022-02-15 01:12:18,920 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 263 transitions. Word has length 50 [2022-02-15 01:12:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:18,921 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 263 transitions. [2022-02-15 01:12:18,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 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) [2022-02-15 01:12:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 263 transitions. [2022-02-15 01:12:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:12:18,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:18,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:18,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:12:18,921 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash -787548180, now seen corresponding path program 2 times [2022-02-15 01:12:18,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:18,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583838179] [2022-02-15 01:12:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:18,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:18,924 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:18,925 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:19,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:19,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 01:12:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:19,167 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:19,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583838179] [2022-02-15 01:12:19,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583838179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:19,167 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:19,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:12:19,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684326420] [2022-02-15 01:12:19,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:19,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:12:19,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:19,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:12:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:12:19,168 INFO L87 Difference]: Start difference. First operand 222 states and 263 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:20,204 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-02-15 01:12:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:12:20,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 01:12:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:20,206 INFO L225 Difference]: With dead ends: 325 [2022-02-15 01:12:20,206 INFO L226 Difference]: Without dead ends: 323 [2022-02-15 01:12:20,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:12:20,206 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 176 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:20,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 96 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-15 01:12:20,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 254. [2022-02-15 01:12:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.1924686192468619) internal successors, (285), 243 states have internal predecessors, (285), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:12:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 302 transitions. [2022-02-15 01:12:20,366 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 302 transitions. Word has length 52 [2022-02-15 01:12:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:20,366 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 302 transitions. [2022-02-15 01:12:20,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 302 transitions. [2022-02-15 01:12:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:12:20,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:20,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:20,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:12:20,367 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:20,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:20,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1609585614, now seen corresponding path program 3 times [2022-02-15 01:12:20,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:20,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954784914] [2022-02-15 01:12:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:20,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:20,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:20,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:20,370 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:20,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:20,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 01:12:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:20,710 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:20,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954784914] [2022-02-15 01:12:20,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954784914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:20,710 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:20,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:12:20,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254528804] [2022-02-15 01:12:20,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:20,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:12:20,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:12:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:20,711 INFO L87 Difference]: Start difference. First operand 254 states and 302 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:21,785 INFO L93 Difference]: Finished difference Result 294 states and 348 transitions. [2022-02-15 01:12:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:12:21,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 01:12:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:21,786 INFO L225 Difference]: With dead ends: 294 [2022-02-15 01:12:21,786 INFO L226 Difference]: Without dead ends: 292 [2022-02-15 01:12:21,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:12:21,787 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 111 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:21,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 104 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-15 01:12:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2022-02-15 01:12:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 236 states have (on average 1.194915254237288) internal successors, (282), 240 states have internal predecessors, (282), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-15 01:12:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 299 transitions. [2022-02-15 01:12:21,940 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 299 transitions. Word has length 52 [2022-02-15 01:12:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:21,940 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 299 transitions. [2022-02-15 01:12:21,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 299 transitions. [2022-02-15 01:12:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:12:21,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:21,941 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:21,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:12:21,941 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1574158879, now seen corresponding path program 9 times [2022-02-15 01:12:21,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:21,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095989335] [2022-02-15 01:12:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:21,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:21,943 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:21,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:21,944 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:22,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:22,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:22,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095989335] [2022-02-15 01:12:22,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095989335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:22,452 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:22,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:12:22,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39961587] [2022-02-15 01:12:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:22,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:12:22,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:22,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:12:22,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:12:22,453 INFO L87 Difference]: Start difference. First operand 251 states and 299 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:23,430 INFO L93 Difference]: Finished difference Result 340 states and 405 transitions. [2022-02-15 01:12:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:12:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:12:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:23,432 INFO L225 Difference]: With dead ends: 340 [2022-02-15 01:12:23,432 INFO L226 Difference]: Without dead ends: 338 [2022-02-15 01:12:23,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=451, Invalid=2201, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:12:23,432 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 163 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:23,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 51 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-15 01:12:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 286. [2022-02-15 01:12:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 268 states have (on average 1.1902985074626866) internal successors, (319), 274 states have internal predecessors, (319), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 4 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-15 01:12:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 340 transitions. [2022-02-15 01:12:23,623 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 340 transitions. Word has length 52 [2022-02-15 01:12:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:23,623 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 340 transitions. [2022-02-15 01:12:23,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 340 transitions. [2022-02-15 01:12:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:12:23,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:23,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:23,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:12:23,624 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1534105639, now seen corresponding path program 10 times [2022-02-15 01:12:23,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:23,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418152488] [2022-02-15 01:12:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:23,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:23,626 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:23,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:23,627 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:24,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:24,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418152488] [2022-02-15 01:12:24,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [418152488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:24,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:24,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:12:24,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37707403] [2022-02-15 01:12:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:24,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:12:24,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:12:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:12:24,129 INFO L87 Difference]: Start difference. First operand 286 states and 340 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:25,392 INFO L93 Difference]: Finished difference Result 370 states and 441 transitions. [2022-02-15 01:12:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:12:25,393 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 01:12:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:25,394 INFO L225 Difference]: With dead ends: 370 [2022-02-15 01:12:25,394 INFO L226 Difference]: Without dead ends: 368 [2022-02-15 01:12:25,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=2591, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:12:25,395 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 210 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:25,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 84 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-02-15 01:12:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 311. [2022-02-15 01:12:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 291 states have (on average 1.1924398625429553) internal successors, (347), 298 states have internal predecessors, (347), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 01:12:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 370 transitions. [2022-02-15 01:12:25,641 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 370 transitions. Word has length 52 [2022-02-15 01:12:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:25,641 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 370 transitions. [2022-02-15 01:12:25,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 370 transitions. [2022-02-15 01:12:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:12:25,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:25,642 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:25,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:12:25,643 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 650625165, now seen corresponding path program 4 times [2022-02-15 01:12:25,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:25,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054262887] [2022-02-15 01:12:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:25,644 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:25,644 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:25,645 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:25,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 01:12:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:25,833 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:25,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054262887] [2022-02-15 01:12:25,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1054262887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:25,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:25,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:12:25,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708083506] [2022-02-15 01:12:25,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:25,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:12:25,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:12:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:12:25,835 INFO L87 Difference]: Start difference. First operand 311 states and 370 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:26,973 INFO L93 Difference]: Finished difference Result 394 states and 467 transitions. [2022-02-15 01:12:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:12:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 01:12:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:26,974 INFO L225 Difference]: With dead ends: 394 [2022-02-15 01:12:26,974 INFO L226 Difference]: Without dead ends: 392 [2022-02-15 01:12:26,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:12:26,975 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 148 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:26,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 114 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-15 01:12:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 305. [2022-02-15 01:12:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 285 states have (on average 1.1929824561403508) internal successors, (340), 292 states have internal predecessors, (340), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 01:12:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 363 transitions. [2022-02-15 01:12:27,232 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 363 transitions. Word has length 55 [2022-02-15 01:12:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:27,232 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 363 transitions. [2022-02-15 01:12:27,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 363 transitions. [2022-02-15 01:12:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:12:27,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:27,233 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:27,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:12:27,233 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash 555461839, now seen corresponding path program 3 times [2022-02-15 01:12:27,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:27,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739674469] [2022-02-15 01:12:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:27,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:27,235 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:27,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:27,235 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:27,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:27,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 01:12:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:27,809 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:27,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739674469] [2022-02-15 01:12:27,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739674469] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:27,809 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:27,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:12:27,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172166376] [2022-02-15 01:12:27,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:27,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:12:27,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:12:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:12:27,811 INFO L87 Difference]: Start difference. First operand 305 states and 363 transitions. Second operand has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:29,232 INFO L93 Difference]: Finished difference Result 388 states and 459 transitions. [2022-02-15 01:12:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:12:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 01:12:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:29,259 INFO L225 Difference]: With dead ends: 388 [2022-02-15 01:12:29,259 INFO L226 Difference]: Without dead ends: 386 [2022-02-15 01:12:29,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=712, Invalid=4400, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:12:29,261 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:29,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 113 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-15 01:12:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 332. [2022-02-15 01:12:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 312 states have (on average 1.1923076923076923) internal successors, (372), 319 states have internal predecessors, (372), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 4 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-15 01:12:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 395 transitions. [2022-02-15 01:12:29,623 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 395 transitions. Word has length 55 [2022-02-15 01:12:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:29,623 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 395 transitions. [2022-02-15 01:12:29,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 395 transitions. [2022-02-15 01:12:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 01:12:29,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:29,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:29,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:12:29,625 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:29,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:29,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1147005369, now seen corresponding path program 5 times [2022-02-15 01:12:29,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:29,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257606687] [2022-02-15 01:12:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:29,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:29,630 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:29,632 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:12:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:12:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:29,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:29,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257606687] [2022-02-15 01:12:29,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1257606687] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:29,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:29,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:12:29,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513843745] [2022-02-15 01:12:29,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:29,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:12:29,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:12:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:12:29,961 INFO L87 Difference]: Start difference. First operand 332 states and 395 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:30,798 INFO L93 Difference]: Finished difference Result 390 states and 462 transitions. [2022-02-15 01:12:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:12:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-02-15 01:12:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:30,800 INFO L225 Difference]: With dead ends: 390 [2022-02-15 01:12:30,800 INFO L226 Difference]: Without dead ends: 388 [2022-02-15 01:12:30,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:12:30,800 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 182 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:30,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 52 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-15 01:12:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 366. [2022-02-15 01:12:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 339 states have (on average 1.176991150442478) internal successors, (399), 349 states have internal predecessors, (399), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (17), 7 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 01:12:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 434 transitions. [2022-02-15 01:12:31,058 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 434 transitions. Word has length 57 [2022-02-15 01:12:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:31,059 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 434 transitions. [2022-02-15 01:12:31,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 434 transitions. [2022-02-15 01:12:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:12:31,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:31,060 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:31,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:12:31,060 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1946369156, now seen corresponding path program 11 times [2022-02-15 01:12:31,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:31,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426557986] [2022-02-15 01:12:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:31,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:31,061 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:31,062 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:31,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:31,556 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:31,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426557986] [2022-02-15 01:12:31,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [426557986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:31,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:31,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:12:31,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509795606] [2022-02-15 01:12:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:31,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:12:31,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:12:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:12:31,557 INFO L87 Difference]: Start difference. First operand 366 states and 434 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:33,235 INFO L93 Difference]: Finished difference Result 498 states and 595 transitions. [2022-02-15 01:12:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:12:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 01:12:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:33,238 INFO L225 Difference]: With dead ends: 498 [2022-02-15 01:12:33,238 INFO L226 Difference]: Without dead ends: 496 [2022-02-15 01:12:33,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=3455, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:12:33,240 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 211 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:33,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 64 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-15 01:12:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 401. [2022-02-15 01:12:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 372 states have (on average 1.185483870967742) internal successors, (441), 383 states have internal predecessors, (441), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 7 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:12:33,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 478 transitions. [2022-02-15 01:12:33,538 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 478 transitions. Word has length 55 [2022-02-15 01:12:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:33,538 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 478 transitions. [2022-02-15 01:12:33,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 478 transitions. [2022-02-15 01:12:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:12:33,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:33,539 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:33,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:12:33,539 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash -426979644, now seen corresponding path program 12 times [2022-02-15 01:12:33,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:33,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944303840] [2022-02-15 01:12:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:33,540 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:33,540 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:33,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:33,542 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:33,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:33,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944303840] [2022-02-15 01:12:33,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1944303840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:33,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:33,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:12:33,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900415593] [2022-02-15 01:12:33,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:33,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:12:33,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:12:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:33,961 INFO L87 Difference]: Start difference. First operand 401 states and 478 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:35,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:35,830 INFO L93 Difference]: Finished difference Result 510 states and 610 transitions. [2022-02-15 01:12:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:12:35,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 01:12:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:35,832 INFO L225 Difference]: With dead ends: 510 [2022-02-15 01:12:35,832 INFO L226 Difference]: Without dead ends: 508 [2022-02-15 01:12:35,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=572, Invalid=3460, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:12:35,833 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 220 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:35,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 106 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:12:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-02-15 01:12:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 410. [2022-02-15 01:12:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 381 states have (on average 1.188976377952756) internal successors, (453), 392 states have internal predecessors, (453), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 7 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:12:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 490 transitions. [2022-02-15 01:12:36,150 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 490 transitions. Word has length 55 [2022-02-15 01:12:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:36,150 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 490 transitions. [2022-02-15 01:12:36,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 490 transitions. [2022-02-15 01:12:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:12:36,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:36,151 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:36,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:12:36,151 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1046366456, now seen corresponding path program 13 times [2022-02-15 01:12:36,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:36,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600643892] [2022-02-15 01:12:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:36,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:36,153 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:36,154 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:36,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:36,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600643892] [2022-02-15 01:12:36,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1600643892] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:36,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:36,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:12:36,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362166194] [2022-02-15 01:12:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:36,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:12:36,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:12:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:12:36,660 INFO L87 Difference]: Start difference. First operand 410 states and 490 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-02-15 01:12:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:37,901 INFO L93 Difference]: Finished difference Result 487 states and 582 transitions. [2022-02-15 01:12:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:12:37,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 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 55 [2022-02-15 01:12:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:37,902 INFO L225 Difference]: With dead ends: 487 [2022-02-15 01:12:37,902 INFO L226 Difference]: Without dead ends: 485 [2022-02-15 01:12:37,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=485, Invalid=2937, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:12:37,903 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 132 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:37,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 106 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-02-15 01:12:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 444. [2022-02-15 01:12:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 412 states have (on average 1.1893203883495145) internal successors, (490), 425 states have internal predecessors, (490), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 7 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-15 01:12:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 531 transitions. [2022-02-15 01:12:38,233 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 531 transitions. Word has length 55 [2022-02-15 01:12:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:38,233 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 531 transitions. [2022-02-15 01:12:38,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-02-15 01:12:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 531 transitions. [2022-02-15 01:12:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:12:38,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:38,234 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:38,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:12:38,235 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -140336322, now seen corresponding path program 14 times [2022-02-15 01:12:38,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:38,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343858255] [2022-02-15 01:12:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:38,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:38,236 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:38,237 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:38,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:38,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:38,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343858255] [2022-02-15 01:12:38,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [343858255] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:38,796 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:38,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:12:38,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838942421] [2022-02-15 01:12:38,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:12:38,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:12:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:12:38,797 INFO L87 Difference]: Start difference. First operand 444 states and 531 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:40,462 INFO L93 Difference]: Finished difference Result 548 states and 655 transitions. [2022-02-15 01:12:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:12:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 01:12:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:40,464 INFO L225 Difference]: With dead ends: 548 [2022-02-15 01:12:40,464 INFO L226 Difference]: Without dead ends: 546 [2022-02-15 01:12:40,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=585, Invalid=3705, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:12:40,465 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 190 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:40,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 106 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-02-15 01:12:40,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 441. [2022-02-15 01:12:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 409 states have (on average 1.1882640586797066) internal successors, (486), 422 states have internal predecessors, (486), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 7 states have call predecessors, (20), 20 states have call successors, (20) [2022-02-15 01:12:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 527 transitions. [2022-02-15 01:12:40,811 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 527 transitions. Word has length 55 [2022-02-15 01:12:40,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:40,811 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 527 transitions. [2022-02-15 01:12:40,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:40,811 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 527 transitions. [2022-02-15 01:12:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:12:40,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:40,828 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:40,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:12:40,828 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:40,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1285024718, now seen corresponding path program 4 times [2022-02-15 01:12:40,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:40,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905927706] [2022-02-15 01:12:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:40,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:40,830 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:40,831 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:41,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:41,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:12:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:41,640 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:41,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905927706] [2022-02-15 01:12:41,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905927706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:41,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:41,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:12:41,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016288225] [2022-02-15 01:12:41,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:41,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:12:41,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:12:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:12:41,642 INFO L87 Difference]: Start difference. First operand 441 states and 527 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:44,021 INFO L93 Difference]: Finished difference Result 540 states and 645 transitions. [2022-02-15 01:12:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:12:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 01:12:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:44,023 INFO L225 Difference]: With dead ends: 540 [2022-02-15 01:12:44,023 INFO L226 Difference]: Without dead ends: 538 [2022-02-15 01:12:44,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2246 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1010, Invalid=6130, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:12:44,024 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 265 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:44,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 88 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-15 01:12:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 465. [2022-02-15 01:12:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 432 states have (on average 1.1875) internal successors, (513), 446 states have internal predecessors, (513), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 01:12:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 556 transitions. [2022-02-15 01:12:44,386 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 556 transitions. Word has length 58 [2022-02-15 01:12:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:44,386 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 556 transitions. [2022-02-15 01:12:44,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 556 transitions. [2022-02-15 01:12:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:12:44,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:44,388 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:44,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:12:44,389 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1642798748, now seen corresponding path program 5 times [2022-02-15 01:12:44,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:44,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973734289] [2022-02-15 01:12:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:44,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:44,390 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:44,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:44,391 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:12:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:45,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:45,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973734289] [2022-02-15 01:12:45,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973734289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:45,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:45,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:12:45,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420326132] [2022-02-15 01:12:45,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:45,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:12:45,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:45,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:12:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:45,096 INFO L87 Difference]: Start difference. First operand 465 states and 556 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:46,856 INFO L93 Difference]: Finished difference Result 565 states and 678 transitions. [2022-02-15 01:12:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:12:46,856 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 01:12:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:46,858 INFO L225 Difference]: With dead ends: 565 [2022-02-15 01:12:46,858 INFO L226 Difference]: Without dead ends: 563 [2022-02-15 01:12:46,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=3201, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:12:46,859 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:46,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 96 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-15 01:12:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 449. [2022-02-15 01:12:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 418 states have (on average 1.19377990430622) internal successors, (499), 431 states have internal predecessors, (499), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:12:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 538 transitions. [2022-02-15 01:12:47,202 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 538 transitions. Word has length 58 [2022-02-15 01:12:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:47,202 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 538 transitions. [2022-02-15 01:12:47,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:12:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 538 transitions. [2022-02-15 01:12:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:12:47,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:47,203 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:47,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:12:47,203 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:47,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1797092794, now seen corresponding path program 5 times [2022-02-15 01:12:47,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:47,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771148823] [2022-02-15 01:12:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:47,205 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:47,205 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:47,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:47,206 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:47,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-02-15 01:12:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:47,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:12:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:47,505 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:47,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771148823] [2022-02-15 01:12:47,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771148823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:47,506 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:47,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:12:47,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828882425] [2022-02-15 01:12:47,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:47,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:12:47,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:12:47,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:12:47,506 INFO L87 Difference]: Start difference. First operand 449 states and 538 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:48,471 INFO L93 Difference]: Finished difference Result 501 states and 600 transitions. [2022-02-15 01:12:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:12:48,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2022-02-15 01:12:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:48,473 INFO L225 Difference]: With dead ends: 501 [2022-02-15 01:12:48,473 INFO L226 Difference]: Without dead ends: 499 [2022-02-15 01:12:48,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:12:48,474 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 173 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:48,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 67 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-15 01:12:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 449. [2022-02-15 01:12:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 418 states have (on average 1.1961722488038278) internal successors, (500), 431 states have internal predecessors, (500), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:12:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 539 transitions. [2022-02-15 01:12:48,826 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 539 transitions. Word has length 60 [2022-02-15 01:12:48,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:48,826 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 539 transitions. [2022-02-15 01:12:48,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 539 transitions. [2022-02-15 01:12:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:12:48,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:48,827 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:48,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:12:48,827 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1104308479, now seen corresponding path program 15 times [2022-02-15 01:12:48,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:48,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662041095] [2022-02-15 01:12:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:48,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:48,829 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:48,830 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:49,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:49,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:49,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662041095] [2022-02-15 01:12:49,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [662041095] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:49,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:49,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:12:49,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465033026] [2022-02-15 01:12:49,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:49,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:12:49,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:12:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:12:49,080 INFO L87 Difference]: Start difference. First operand 449 states and 539 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:50,996 INFO L93 Difference]: Finished difference Result 662 states and 809 transitions. [2022-02-15 01:12:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 01:12:50,996 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:12:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:51,000 INFO L225 Difference]: With dead ends: 662 [2022-02-15 01:12:51,000 INFO L226 Difference]: Without dead ends: 660 [2022-02-15 01:12:51,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1472, Invalid=4690, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:12:51,001 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 263 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:51,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 60 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-02-15 01:12:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 488. [2022-02-15 01:12:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 456 states have (on average 1.206140350877193) internal successors, (550), 469 states have internal predecessors, (550), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:12:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 589 transitions. [2022-02-15 01:12:51,419 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 589 transitions. Word has length 58 [2022-02-15 01:12:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:51,420 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 589 transitions. [2022-02-15 01:12:51,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 589 transitions. [2022-02-15 01:12:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:12:51,421 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:51,421 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:51,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:12:51,421 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash -403243901, now seen corresponding path program 11 times [2022-02-15 01:12:51,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:51,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344599059] [2022-02-15 01:12:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:51,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:51,422 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:51,423 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:51,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:51,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:51,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344599059] [2022-02-15 01:12:51,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344599059] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:51,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:51,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:12:51,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561510320] [2022-02-15 01:12:51,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:51,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:12:51,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:12:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:12:51,491 INFO L87 Difference]: Start difference. First operand 488 states and 589 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-15 01:12:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:52,396 INFO L93 Difference]: Finished difference Result 616 states and 753 transitions. [2022-02-15 01:12:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:12:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 58 [2022-02-15 01:12:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:52,398 INFO L225 Difference]: With dead ends: 616 [2022-02-15 01:12:52,398 INFO L226 Difference]: Without dead ends: 590 [2022-02-15 01:12:52,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:12:52,399 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 152 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:52,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 70 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-02-15 01:12:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 494. [2022-02-15 01:12:52,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 462 states have (on average 1.2077922077922079) internal successors, (558), 475 states have internal predecessors, (558), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:12:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 597 transitions. [2022-02-15 01:12:52,772 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 597 transitions. Word has length 58 [2022-02-15 01:12:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:52,772 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 597 transitions. [2022-02-15 01:12:52,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-02-15 01:12:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 597 transitions. [2022-02-15 01:12:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:12:52,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:52,773 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:52,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:12:52,773 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1786782527, now seen corresponding path program 16 times [2022-02-15 01:12:52,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:52,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027512803] [2022-02-15 01:12:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:52,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:52,775 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:52,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:52,776 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:53,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:53,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:53,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027512803] [2022-02-15 01:12:53,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027512803] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:53,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:53,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:12:53,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903369824] [2022-02-15 01:12:53,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:53,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:12:53,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:12:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:12:53,438 INFO L87 Difference]: Start difference. First operand 494 states and 597 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:54,793 INFO L93 Difference]: Finished difference Result 584 states and 701 transitions. [2022-02-15 01:12:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:12:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:12:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:54,795 INFO L225 Difference]: With dead ends: 584 [2022-02-15 01:12:54,795 INFO L226 Difference]: Without dead ends: 582 [2022-02-15 01:12:54,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=3829, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:12:54,795 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 228 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:54,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 106 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-02-15 01:12:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 500. [2022-02-15 01:12:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 468 states have (on average 1.2094017094017093) internal successors, (566), 481 states have internal predecessors, (566), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 6 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-15 01:12:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 605 transitions. [2022-02-15 01:12:55,193 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 605 transitions. Word has length 58 [2022-02-15 01:12:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:55,193 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 605 transitions. [2022-02-15 01:12:55,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 605 transitions. [2022-02-15 01:12:55,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:12:55,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:55,194 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:55,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:12:55,194 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -266865911, now seen corresponding path program 12 times [2022-02-15 01:12:55,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:55,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552105902] [2022-02-15 01:12:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:55,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:55,196 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:55,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:55,197 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:55,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:55,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:55,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552105902] [2022-02-15 01:12:55,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1552105902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:55,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:55,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:12:55,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4273313] [2022-02-15 01:12:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:55,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:12:55,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:12:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:12:55,652 INFO L87 Difference]: Start difference. First operand 500 states and 605 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:58,068 INFO L93 Difference]: Finished difference Result 644 states and 774 transitions. [2022-02-15 01:12:58,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:12:58,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:12:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:58,070 INFO L225 Difference]: With dead ends: 644 [2022-02-15 01:12:58,070 INFO L226 Difference]: Without dead ends: 642 [2022-02-15 01:12:58,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=662, Invalid=4888, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:12:58,071 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 350 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:58,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 76 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:12:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-15 01:12:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 477. [2022-02-15 01:12:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 447 states have (on average 1.2125279642058167) internal successors, (542), 459 states have internal predecessors, (542), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 01:12:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 577 transitions. [2022-02-15 01:12:58,429 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 577 transitions. Word has length 58 [2022-02-15 01:12:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:58,429 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 577 transitions. [2022-02-15 01:12:58,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 577 transitions. [2022-02-15 01:12:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:12:58,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:58,430 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:58,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:12:58,431 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash 396084749, now seen corresponding path program 17 times [2022-02-15 01:12:58,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:58,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014132406] [2022-02-15 01:12:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:58,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:12:58,432 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:12:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:58,433 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:59,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:59,020 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:59,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014132406] [2022-02-15 01:12:59,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014132406] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:59,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:59,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:12:59,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112310459] [2022-02-15 01:12:59,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:59,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:12:59,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:12:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:12:59,021 INFO L87 Difference]: Start difference. First operand 477 states and 577 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:00,926 INFO L93 Difference]: Finished difference Result 612 states and 738 transitions. [2022-02-15 01:13:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:13:00,926 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:13:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:00,928 INFO L225 Difference]: With dead ends: 612 [2022-02-15 01:13:00,928 INFO L226 Difference]: Without dead ends: 610 [2022-02-15 01:13:00,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=606, Invalid=4086, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:13:00,929 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 226 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:00,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 86 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:13:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-02-15 01:13:01,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 477. [2022-02-15 01:13:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 447 states have (on average 1.2125279642058167) internal successors, (542), 459 states have internal predecessors, (542), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 01:13:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 577 transitions. [2022-02-15 01:13:01,297 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 577 transitions. Word has length 58 [2022-02-15 01:13:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:01,298 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 577 transitions. [2022-02-15 01:13:01,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 577 transitions. [2022-02-15 01:13:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:13:01,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:01,299 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:01,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:13:01,299 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash -441878337, now seen corresponding path program 13 times [2022-02-15 01:13:01,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:01,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078159530] [2022-02-15 01:13:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:01,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:01,300 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:01,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:01,305 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:01,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:01,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:01,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078159530] [2022-02-15 01:13:01,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078159530] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:01,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:01,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:13:01,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714155086] [2022-02-15 01:13:01,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:01,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:13:01,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:01,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:13:01,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:13:01,963 INFO L87 Difference]: Start difference. First operand 477 states and 577 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:04,065 INFO L93 Difference]: Finished difference Result 602 states and 724 transitions. [2022-02-15 01:13:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:13:04,065 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:13:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:04,066 INFO L225 Difference]: With dead ends: 602 [2022-02-15 01:13:04,067 INFO L226 Difference]: Without dead ends: 600 [2022-02-15 01:13:04,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=540, Invalid=4152, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:13:04,067 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 204 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:04,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 97 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-02-15 01:13:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 483. [2022-02-15 01:13:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 453 states have (on average 1.2119205298013245) internal successors, (549), 465 states have internal predecessors, (549), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 01:13:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 584 transitions. [2022-02-15 01:13:04,439 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 584 transitions. Word has length 58 [2022-02-15 01:13:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:04,439 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 584 transitions. [2022-02-15 01:13:04,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:04,439 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 584 transitions. [2022-02-15 01:13:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:13:04,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:04,440 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:04,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:13:04,440 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2022038101, now seen corresponding path program 14 times [2022-02-15 01:13:04,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:04,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408483283] [2022-02-15 01:13:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:04,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:04,442 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:04,443 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:05,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:05,067 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:05,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408483283] [2022-02-15 01:13:05,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [408483283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:05,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:05,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:13:05,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333651269] [2022-02-15 01:13:05,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:05,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:13:05,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:13:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:13:05,068 INFO L87 Difference]: Start difference. First operand 483 states and 584 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:07,404 INFO L93 Difference]: Finished difference Result 640 states and 773 transitions. [2022-02-15 01:13:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:13:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:13:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:07,406 INFO L225 Difference]: With dead ends: 640 [2022-02-15 01:13:07,406 INFO L226 Difference]: Without dead ends: 638 [2022-02-15 01:13:07,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=641, Invalid=4761, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:13:07,407 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:07,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 83 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-02-15 01:13:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 483. [2022-02-15 01:13:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 453 states have (on average 1.2119205298013245) internal successors, (549), 465 states have internal predecessors, (549), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (17), 5 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-15 01:13:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 584 transitions. [2022-02-15 01:13:07,795 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 584 transitions. Word has length 58 [2022-02-15 01:13:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:07,795 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 584 transitions. [2022-02-15 01:13:07,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 584 transitions. [2022-02-15 01:13:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:13:07,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:07,796 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:07,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:13:07,797 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:07,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1349061435, now seen corresponding path program 6 times [2022-02-15 01:13:07,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:07,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795977360] [2022-02-15 01:13:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:07,798 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:07,798 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:07,799 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:08,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:08,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:13:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:08,164 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:08,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795977360] [2022-02-15 01:13:08,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1795977360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:08,165 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:08,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:13:08,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190133475] [2022-02-15 01:13:08,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:08,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:13:08,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:13:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:13:08,166 INFO L87 Difference]: Start difference. First operand 483 states and 584 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:09,464 INFO L93 Difference]: Finished difference Result 588 states and 710 transitions. [2022-02-15 01:13:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:13:09,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-15 01:13:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:09,466 INFO L225 Difference]: With dead ends: 588 [2022-02-15 01:13:09,467 INFO L226 Difference]: Without dead ends: 586 [2022-02-15 01:13:09,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:13:09,467 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 187 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:09,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 83 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:09,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-02-15 01:13:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 520. [2022-02-15 01:13:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 482 states have (on average 1.2033195020746887) internal successors, (580), 498 states have internal predecessors, (580), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 627 transitions. [2022-02-15 01:13:09,899 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 627 transitions. Word has length 60 [2022-02-15 01:13:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:09,899 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 627 transitions. [2022-02-15 01:13:09,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 627 transitions. [2022-02-15 01:13:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:13:09,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:09,900 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:09,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:13:09,900 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 527024001, now seen corresponding path program 7 times [2022-02-15 01:13:09,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:09,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858329499] [2022-02-15 01:13:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:09,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:09,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:09,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:09,917 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:10,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:10,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:13:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:10,210 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:10,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858329499] [2022-02-15 01:13:10,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [858329499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:10,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:10,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:13:10,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348687139] [2022-02-15 01:13:10,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:10,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:13:10,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:10,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:13:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:13:10,211 INFO L87 Difference]: Start difference. First operand 520 states and 627 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:11,633 INFO L93 Difference]: Finished difference Result 601 states and 725 transitions. [2022-02-15 01:13:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:13:11,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-15 01:13:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:11,635 INFO L225 Difference]: With dead ends: 601 [2022-02-15 01:13:11,635 INFO L226 Difference]: Without dead ends: 599 [2022-02-15 01:13:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1999, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:13:11,636 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 194 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 112 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-02-15 01:13:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 534. [2022-02-15 01:13:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 496 states have (on average 1.2076612903225807) internal successors, (599), 512 states have internal predecessors, (599), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 7 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 646 transitions. [2022-02-15 01:13:12,076 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 646 transitions. Word has length 60 [2022-02-15 01:13:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:12,076 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 646 transitions. [2022-02-15 01:13:12,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 646 transitions. [2022-02-15 01:13:12,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:13:12,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:12,077 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:12,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:13:12,078 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash 117942087, now seen corresponding path program 8 times [2022-02-15 01:13:12,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:12,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953178309] [2022-02-15 01:13:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:12,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:12,079 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:12,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:12,080 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:12,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:12,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:13:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:12,623 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:12,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953178309] [2022-02-15 01:13:12,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [953178309] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:12,623 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:12,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:13:12,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286182222] [2022-02-15 01:13:12,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:12,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:13:12,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:13:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:13:12,624 INFO L87 Difference]: Start difference. First operand 534 states and 646 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:14,463 INFO L93 Difference]: Finished difference Result 613 states and 736 transitions. [2022-02-15 01:13:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:13:14,463 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-15 01:13:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:14,465 INFO L225 Difference]: With dead ends: 613 [2022-02-15 01:13:14,465 INFO L226 Difference]: Without dead ends: 611 [2022-02-15 01:13:14,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=3825, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:13:14,466 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 207 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:14,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 133 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1950 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-15 01:13:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 527. [2022-02-15 01:13:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 492 states have (on average 1.2134146341463414) internal successors, (597), 506 states have internal predecessors, (597), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 7 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-15 01:13:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 640 transitions. [2022-02-15 01:13:14,917 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 640 transitions. Word has length 60 [2022-02-15 01:13:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:14,917 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 640 transitions. [2022-02-15 01:13:14,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 640 transitions. [2022-02-15 01:13:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:14,918 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:14,918 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:14,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:13:14,919 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:14,919 INFO L85 PathProgramCache]: Analyzing trace with hash 470069801, now seen corresponding path program 6 times [2022-02-15 01:13:14,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:14,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871067707] [2022-02-15 01:13:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:14,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:14,920 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:14,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:14,921 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:15,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:15,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 01:13:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:15,660 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:15,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871067707] [2022-02-15 01:13:15,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [871067707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:15,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:15,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:13:15,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748346081] [2022-02-15 01:13:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:15,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:13:15,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:13:15,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:13:15,661 INFO L87 Difference]: Start difference. First operand 527 states and 640 transitions. Second operand has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:17,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:17,732 INFO L93 Difference]: Finished difference Result 649 states and 782 transitions. [2022-02-15 01:13:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:13:17,733 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 01:13:17,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:17,735 INFO L225 Difference]: With dead ends: 649 [2022-02-15 01:13:17,735 INFO L226 Difference]: Without dead ends: 647 [2022-02-15 01:13:17,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=606, Invalid=4650, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:13:17,736 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 211 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:17,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 116 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-02-15 01:13:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 555. [2022-02-15 01:13:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 518 states have (on average 1.2084942084942085) internal successors, (626), 533 states have internal predecessors, (626), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 7 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:13:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 671 transitions. [2022-02-15 01:13:18,209 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 671 transitions. Word has length 61 [2022-02-15 01:13:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 671 transitions. [2022-02-15 01:13:18,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 671 transitions. [2022-02-15 01:13:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:18,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:18,210 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:18,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:13:18,210 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1495534305, now seen corresponding path program 7 times [2022-02-15 01:13:18,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:18,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305021770] [2022-02-15 01:13:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:18,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:18,212 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:18,213 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:18,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:18,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 01:13:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:18,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:18,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305021770] [2022-02-15 01:13:18,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [305021770] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:18,910 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:18,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:13:18,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98595883] [2022-02-15 01:13:18,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:18,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:13:18,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:13:18,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:13:18,911 INFO L87 Difference]: Start difference. First operand 555 states and 671 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:21,586 INFO L93 Difference]: Finished difference Result 695 states and 836 transitions. [2022-02-15 01:13:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 01:13:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 01:13:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:21,589 INFO L225 Difference]: With dead ends: 695 [2022-02-15 01:13:21,589 INFO L226 Difference]: Without dead ends: 693 [2022-02-15 01:13:21,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=634, Invalid=5066, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:13:21,605 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 200 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:21,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 104 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:13:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-02-15 01:13:22,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 549. [2022-02-15 01:13:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 512 states have (on average 1.208984375) internal successors, (619), 527 states have internal predecessors, (619), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 7 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:13:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 664 transitions. [2022-02-15 01:13:22,098 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 664 transitions. Word has length 61 [2022-02-15 01:13:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:22,099 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 664 transitions. [2022-02-15 01:13:22,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 664 transitions. [2022-02-15 01:13:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:13:22,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:22,100 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:22,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:13:22,100 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1750933991, now seen corresponding path program 9 times [2022-02-15 01:13:22,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:22,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103325536] [2022-02-15 01:13:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:22,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:22,101 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:22,103 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:22,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:22,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-15 01:13:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:22,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:13:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:22,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:22,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103325536] [2022-02-15 01:13:22,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103325536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:22,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:22,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:13:22,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953146287] [2022-02-15 01:13:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:22,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:13:22,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:13:22,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:13:22,613 INFO L87 Difference]: Start difference. First operand 549 states and 664 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:13:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:24,087 INFO L93 Difference]: Finished difference Result 641 states and 773 transitions. [2022-02-15 01:13:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:13:24,087 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 63 [2022-02-15 01:13:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:24,089 INFO L225 Difference]: With dead ends: 641 [2022-02-15 01:13:24,089 INFO L226 Difference]: Without dead ends: 639 [2022-02-15 01:13:24,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=2430, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:13:24,090 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 204 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:24,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 86 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-15 01:13:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 575. [2022-02-15 01:13:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 537 states have (on average 1.2085661080074488) internal successors, (649), 552 states have internal predecessors, (649), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 696 transitions. [2022-02-15 01:13:24,619 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 696 transitions. Word has length 63 [2022-02-15 01:13:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:24,619 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 696 transitions. [2022-02-15 01:13:24,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:13:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 696 transitions. [2022-02-15 01:13:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:24,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:24,620 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:24,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:13:24,620 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:24,621 INFO L85 PathProgramCache]: Analyzing trace with hash -184264233, now seen corresponding path program 18 times [2022-02-15 01:13:24,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:24,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981724847] [2022-02-15 01:13:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:24,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:24,622 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:24,623 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:24,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:24,815 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:24,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981724847] [2022-02-15 01:13:24,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981724847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:24,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:24,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:13:24,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602662045] [2022-02-15 01:13:24,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:24,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:13:24,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:13:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:13:24,816 INFO L87 Difference]: Start difference. First operand 575 states and 696 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2022-02-15 01:13:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:26,403 INFO L93 Difference]: Finished difference Result 1162 states and 1436 transitions. [2022-02-15 01:13:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:13:26,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 61 [2022-02-15 01:13:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:26,406 INFO L225 Difference]: With dead ends: 1162 [2022-02-15 01:13:26,406 INFO L226 Difference]: Without dead ends: 993 [2022-02-15 01:13:26,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:13:26,407 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 367 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:26,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 108 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:13:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-02-15 01:13:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 792. [2022-02-15 01:13:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 754 states have (on average 1.2188328912466844) internal successors, (919), 769 states have internal predecessors, (919), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (23), 8 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 966 transitions. [2022-02-15 01:13:27,087 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 966 transitions. Word has length 61 [2022-02-15 01:13:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:27,087 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 966 transitions. [2022-02-15 01:13:27,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2022-02-15 01:13:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 966 transitions. [2022-02-15 01:13:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:27,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:27,089 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:27,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:13:27,089 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1632684826, now seen corresponding path program 15 times [2022-02-15 01:13:27,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:27,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838882006] [2022-02-15 01:13:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:27,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:27,090 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:27,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:27,092 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:27,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:27,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838882006] [2022-02-15 01:13:27,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838882006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:27,405 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:27,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:13:27,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921468582] [2022-02-15 01:13:27,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:27,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:13:27,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:27,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:13:27,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:13:27,405 INFO L87 Difference]: Start difference. First operand 792 states and 966 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:29,778 INFO L93 Difference]: Finished difference Result 1058 states and 1292 transitions. [2022-02-15 01:13:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 01:13:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:13:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:29,781 INFO L225 Difference]: With dead ends: 1058 [2022-02-15 01:13:29,782 INFO L226 Difference]: Without dead ends: 1006 [2022-02-15 01:13:29,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1201, Invalid=4499, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:13:29,782 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 290 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:29,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 96 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-02-15 01:13:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 805. [2022-02-15 01:13:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 768 states have (on average 1.2135416666666667) internal successors, (932), 782 states have internal predecessors, (932), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:13:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 977 transitions. [2022-02-15 01:13:30,483 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 977 transitions. Word has length 61 [2022-02-15 01:13:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:30,484 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 977 transitions. [2022-02-15 01:13:30,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 977 transitions. [2022-02-15 01:13:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:30,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:30,485 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:30,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:13:30,485 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1542934108, now seen corresponding path program 19 times [2022-02-15 01:13:30,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:30,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181132578] [2022-02-15 01:13:30,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:30,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:30,487 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:30,488 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:31,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:31,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181132578] [2022-02-15 01:13:31,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [181132578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:31,195 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:31,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:13:31,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798408897] [2022-02-15 01:13:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:31,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:13:31,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:13:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:13:31,196 INFO L87 Difference]: Start difference. First operand 805 states and 977 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:34,354 INFO L93 Difference]: Finished difference Result 993 states and 1202 transitions. [2022-02-15 01:13:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:13:34,355 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:13:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:34,357 INFO L225 Difference]: With dead ends: 993 [2022-02-15 01:13:34,357 INFO L226 Difference]: Without dead ends: 991 [2022-02-15 01:13:34,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=759, Invalid=5883, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 01:13:34,358 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 312 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:34,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 106 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2537 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:13:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-02-15 01:13:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 820. [2022-02-15 01:13:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 783 states have (on average 1.2158365261813537) internal successors, (952), 797 states have internal predecessors, (952), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:13:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 997 transitions. [2022-02-15 01:13:35,077 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 997 transitions. Word has length 61 [2022-02-15 01:13:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:35,077 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 997 transitions. [2022-02-15 01:13:35,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 997 transitions. [2022-02-15 01:13:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:35,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:35,078 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:35,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:13:35,079 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 747738716, now seen corresponding path program 16 times [2022-02-15 01:13:35,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:35,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386643101] [2022-02-15 01:13:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:35,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:35,080 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:35,082 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:35,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:35,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386643101] [2022-02-15 01:13:35,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [386643101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:35,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:35,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:13:35,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743520082] [2022-02-15 01:13:35,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:35,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:13:35,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:13:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:13:35,589 INFO L87 Difference]: Start difference. First operand 820 states and 997 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:37,839 INFO L93 Difference]: Finished difference Result 941 states and 1138 transitions. [2022-02-15 01:13:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:13:37,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:13:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:37,841 INFO L225 Difference]: With dead ends: 941 [2022-02-15 01:13:37,841 INFO L226 Difference]: Without dead ends: 939 [2022-02-15 01:13:37,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:13:37,842 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 195 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:37,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 88 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-02-15 01:13:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 826. [2022-02-15 01:13:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 789 states have (on average 1.2167300380228137) internal successors, (960), 803 states have internal predecessors, (960), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 8 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:13:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1005 transitions. [2022-02-15 01:13:38,561 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1005 transitions. Word has length 61 [2022-02-15 01:13:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:38,561 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1005 transitions. [2022-02-15 01:13:38,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1005 transitions. [2022-02-15 01:13:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:13:38,563 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:38,563 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:38,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:13:38,563 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:38,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1042853094, now seen corresponding path program 17 times [2022-02-15 01:13:38,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:38,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781598435] [2022-02-15 01:13:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:38,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:38,565 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:38,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:38,566 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:39,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:39,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:39,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781598435] [2022-02-15 01:13:39,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [781598435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:39,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:39,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:13:39,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209080501] [2022-02-15 01:13:39,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:39,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:13:39,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:13:39,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:13:39,324 INFO L87 Difference]: Start difference. First operand 826 states and 1005 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:42,254 INFO L93 Difference]: Finished difference Result 1003 states and 1212 transitions. [2022-02-15 01:13:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:13:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:13:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:42,257 INFO L225 Difference]: With dead ends: 1003 [2022-02-15 01:13:42,257 INFO L226 Difference]: Without dead ends: 1001 [2022-02-15 01:13:42,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=622, Invalid=4780, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:13:42,258 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 199 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:42,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 76 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2014 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:13:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-02-15 01:13:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 759. [2022-02-15 01:13:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 727 states have (on average 1.2173314993122422) internal successors, (885), 737 states have internal predecessors, (885), 19 states have call successors, (19), 13 states have call predecessors, (19), 12 states have return successors, (18), 8 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:13:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 922 transitions. [2022-02-15 01:13:42,937 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 922 transitions. Word has length 61 [2022-02-15 01:13:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:42,937 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 922 transitions. [2022-02-15 01:13:42,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 922 transitions. [2022-02-15 01:13:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:13:42,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:42,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:42,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:13:42,938 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:42,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:42,939 INFO L85 PathProgramCache]: Analyzing trace with hash -171237983, now seen corresponding path program 6 times [2022-02-15 01:13:42,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:42,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856657711] [2022-02-15 01:13:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:42,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:42,943 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:42,944 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:43,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-15 01:13:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:43,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:13:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:43,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:13:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:43,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:43,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856657711] [2022-02-15 01:13:43,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856657711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:43,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:43,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:13:43,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096280643] [2022-02-15 01:13:43,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:43,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:13:43,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:13:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:13:43,077 INFO L87 Difference]: Start difference. First operand 759 states and 922 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:13:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:44,261 INFO L93 Difference]: Finished difference Result 821 states and 995 transitions. [2022-02-15 01:13:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:13:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 65 [2022-02-15 01:13:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:44,263 INFO L225 Difference]: With dead ends: 821 [2022-02-15 01:13:44,263 INFO L226 Difference]: Without dead ends: 752 [2022-02-15 01:13:44,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:13:44,264 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 205 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:44,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 54 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:13:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-15 01:13:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 728. [2022-02-15 01:13:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 699 states have (on average 1.184549356223176) internal successors, (828), 709 states have internal predecessors, (828), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-15 01:13:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 866 transitions. [2022-02-15 01:13:44,933 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 866 transitions. Word has length 65 [2022-02-15 01:13:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:44,933 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 866 transitions. [2022-02-15 01:13:44,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:13:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 866 transitions. [2022-02-15 01:13:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:13:44,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:44,934 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:44,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:13:44,934 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 972338910, now seen corresponding path program 10 times [2022-02-15 01:13:44,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:44,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065631722] [2022-02-15 01:13:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:44,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:44,936 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:44,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:44,937 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:45,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:13:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:45,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:45,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065631722] [2022-02-15 01:13:45,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065631722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:45,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:45,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:13:45,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255400266] [2022-02-15 01:13:45,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:45,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:13:45,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:13:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:13:45,197 INFO L87 Difference]: Start difference. First operand 728 states and 866 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:47,776 INFO L93 Difference]: Finished difference Result 964 states and 1156 transitions. [2022-02-15 01:13:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:13:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 01:13:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:47,779 INFO L225 Difference]: With dead ends: 964 [2022-02-15 01:13:47,780 INFO L226 Difference]: Without dead ends: 962 [2022-02-15 01:13:47,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=535, Invalid=5015, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:13:47,783 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 253 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:47,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 128 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:13:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-02-15 01:13:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 781. [2022-02-15 01:13:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 746 states have (on average 1.1863270777479893) internal successors, (885), 760 states have internal predecessors, (885), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 933 transitions. [2022-02-15 01:13:48,560 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 933 transitions. Word has length 63 [2022-02-15 01:13:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:48,560 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 933 transitions. [2022-02-15 01:13:48,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 933 transitions. [2022-02-15 01:13:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:13:48,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:48,561 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:48,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:13:48,561 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:48,562 INFO L85 PathProgramCache]: Analyzing trace with hash 736626974, now seen corresponding path program 11 times [2022-02-15 01:13:48,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:48,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916445746] [2022-02-15 01:13:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:48,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:48,563 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:48,564 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:48,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:13:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:48,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:48,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916445746] [2022-02-15 01:13:48,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [916445746] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:48,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:48,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:13:48,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769842763] [2022-02-15 01:13:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:48,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:13:48,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:13:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:13:48,918 INFO L87 Difference]: Start difference. First operand 781 states and 933 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:50,601 INFO L93 Difference]: Finished difference Result 838 states and 996 transitions. [2022-02-15 01:13:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:13:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 01:13:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:50,604 INFO L225 Difference]: With dead ends: 838 [2022-02-15 01:13:50,604 INFO L226 Difference]: Without dead ends: 836 [2022-02-15 01:13:50,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:13:50,605 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 153 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:50,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 128 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:13:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-15 01:13:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 794. [2022-02-15 01:13:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 758 states have (on average 1.187335092348285) internal successors, (900), 772 states have internal predecessors, (900), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 948 transitions. [2022-02-15 01:13:51,427 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 948 transitions. Word has length 63 [2022-02-15 01:13:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:51,428 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 948 transitions. [2022-02-15 01:13:51,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 948 transitions. [2022-02-15 01:13:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:13:51,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:51,429 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:51,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:13:51,429 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:51,429 INFO L85 PathProgramCache]: Analyzing trace with hash -578416814, now seen corresponding path program 12 times [2022-02-15 01:13:51,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:51,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537478843] [2022-02-15 01:13:51,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:51,430 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:51,431 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:51,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:51,432 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:13:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:51,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:51,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537478843] [2022-02-15 01:13:51,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [537478843] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:51,802 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:51,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:13:51,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203231794] [2022-02-15 01:13:51,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:51,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:13:51,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:13:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:13:51,802 INFO L87 Difference]: Start difference. First operand 794 states and 948 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:53,584 INFO L93 Difference]: Finished difference Result 853 states and 1016 transitions. [2022-02-15 01:13:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:13:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 01:13:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:53,587 INFO L225 Difference]: With dead ends: 853 [2022-02-15 01:13:53,587 INFO L226 Difference]: Without dead ends: 851 [2022-02-15 01:13:53,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:13:53,588 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 121 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:53,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 121 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:13:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-02-15 01:13:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 779. [2022-02-15 01:13:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 743 states have (on average 1.187079407806191) internal successors, (882), 757 states have internal predecessors, (882), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 930 transitions. [2022-02-15 01:13:54,357 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 930 transitions. Word has length 63 [2022-02-15 01:13:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:54,357 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 930 transitions. [2022-02-15 01:13:54,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 930 transitions. [2022-02-15 01:13:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:13:54,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:54,358 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:54,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:13:54,358 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1107936288, now seen corresponding path program 8 times [2022-02-15 01:13:54,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:54,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559650163] [2022-02-15 01:13:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:54,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:54,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:54,361 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:55,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:13:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:55,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:55,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559650163] [2022-02-15 01:13:55,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1559650163] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:55,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:55,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:13:55,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376720187] [2022-02-15 01:13:55,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:55,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:13:55,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:13:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:13:55,083 INFO L87 Difference]: Start difference. First operand 779 states and 930 transitions. Second operand has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:58,606 INFO L93 Difference]: Finished difference Result 895 states and 1064 transitions. [2022-02-15 01:13:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:13:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 01:13:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:58,618 INFO L225 Difference]: With dead ends: 895 [2022-02-15 01:13:58,618 INFO L226 Difference]: Without dead ends: 893 [2022-02-15 01:13:58,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=903, Invalid=7653, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:13:58,619 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 269 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:58,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 106 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:13:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-02-15 01:13:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 779. [2022-02-15 01:13:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 743 states have (on average 1.187079407806191) internal successors, (882), 757 states have internal predecessors, (882), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 10 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-15 01:13:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 930 transitions. [2022-02-15 01:13:59,403 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 930 transitions. Word has length 63 [2022-02-15 01:13:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:59,403 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 930 transitions. [2022-02-15 01:13:59,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:13:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 930 transitions. [2022-02-15 01:13:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:13:59,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:59,405 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:59,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:13:59,405 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash -645721556, now seen corresponding path program 9 times [2022-02-15 01:13:59,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:59,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276696661] [2022-02-15 01:13:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:59,406 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:13:59,406 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:13:59,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:59,408 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:13:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:00,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 01:14:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:00,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:00,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276696661] [2022-02-15 01:14:00,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [276696661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:00,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:00,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:14:00,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105056394] [2022-02-15 01:14:00,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:00,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:14:00,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:00,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:14:00,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:14:00,030 INFO L87 Difference]: Start difference. First operand 779 states and 930 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:02,405 INFO L93 Difference]: Finished difference Result 817 states and 973 transitions. [2022-02-15 01:14:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:14:02,406 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 01:14:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:02,407 INFO L225 Difference]: With dead ends: 817 [2022-02-15 01:14:02,407 INFO L226 Difference]: Without dead ends: 815 [2022-02-15 01:14:02,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=647, Invalid=3643, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:14:02,415 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 203 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:02,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 134 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:14:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-02-15 01:14:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 775. [2022-02-15 01:14:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 740 states have (on average 1.1878378378378378) internal successors, (879), 754 states have internal predecessors, (879), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (22), 9 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-15 01:14:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 925 transitions. [2022-02-15 01:14:03,197 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 925 transitions. Word has length 64 [2022-02-15 01:14:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:03,197 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 925 transitions. [2022-02-15 01:14:03,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 925 transitions. [2022-02-15 01:14:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:14:03,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:03,199 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:03,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:14:03,199 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:03,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:03,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1217741736, now seen corresponding path program 7 times [2022-02-15 01:14:03,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:03,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375421041] [2022-02-15 01:14:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:03,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:03,200 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:03,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:03,202 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:14:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:14:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:03,570 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:03,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375421041] [2022-02-15 01:14:03,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [375421041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:03,570 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:03,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:14:03,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494020743] [2022-02-15 01:14:03,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:03,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:14:03,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:14:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:14:03,571 INFO L87 Difference]: Start difference. First operand 775 states and 925 transitions. Second operand has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:05,140 INFO L93 Difference]: Finished difference Result 856 states and 1023 transitions. [2022-02-15 01:14:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:14:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 65 [2022-02-15 01:14:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:05,143 INFO L225 Difference]: With dead ends: 856 [2022-02-15 01:14:05,143 INFO L226 Difference]: Without dead ends: 854 [2022-02-15 01:14:05,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:14:05,144 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 151 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:05,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 94 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:14:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-15 01:14:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 818. [2022-02-15 01:14:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 776 states have (on average 1.184278350515464) internal successors, (919), 793 states have internal predecessors, (919), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (28), 12 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-15 01:14:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 977 transitions. [2022-02-15 01:14:06,029 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 977 transitions. Word has length 65 [2022-02-15 01:14:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 977 transitions. [2022-02-15 01:14:06,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 977 transitions. [2022-02-15 01:14:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:14:06,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:06,030 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:06,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:14:06,030 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash 775255317, now seen corresponding path program 20 times [2022-02-15 01:14:06,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:06,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925367294] [2022-02-15 01:14:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:06,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:06,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:06,034 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:06,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:06,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:06,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925367294] [2022-02-15 01:14:06,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [925367294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:06,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:06,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:14:06,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742952628] [2022-02-15 01:14:06,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:06,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:14:06,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:14:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:14:06,879 INFO L87 Difference]: Start difference. First operand 818 states and 977 transitions. Second operand has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:09,871 INFO L93 Difference]: Finished difference Result 1102 states and 1324 transitions. [2022-02-15 01:14:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:14:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2022-02-15 01:14:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:09,873 INFO L225 Difference]: With dead ends: 1102 [2022-02-15 01:14:09,874 INFO L226 Difference]: Without dead ends: 1100 [2022-02-15 01:14:09,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=4480, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:14:09,874 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 379 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:09,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 105 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2226 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:14:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-02-15 01:14:10,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 878. [2022-02-15 01:14:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 832 states have (on average 1.1875) internal successors, (988), 851 states have internal predecessors, (988), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (30), 12 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-15 01:14:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1050 transitions. [2022-02-15 01:14:10,803 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1050 transitions. Word has length 63 [2022-02-15 01:14:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:10,803 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1050 transitions. [2022-02-15 01:14:10,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1050 transitions. [2022-02-15 01:14:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:14:10,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:10,804 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:10,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:14:10,804 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -124747383, now seen corresponding path program 21 times [2022-02-15 01:14:10,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:10,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822267499] [2022-02-15 01:14:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:10,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:10,806 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:10,807 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:11,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:11,427 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:11,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822267499] [2022-02-15 01:14:11,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822267499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:11,427 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:11,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:14:11,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213572361] [2022-02-15 01:14:11,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:11,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:14:11,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:14:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:14:11,428 INFO L87 Difference]: Start difference. First operand 878 states and 1050 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:13,485 INFO L93 Difference]: Finished difference Result 1020 states and 1217 transitions. [2022-02-15 01:14:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:14:13,485 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2022-02-15 01:14:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:13,487 INFO L225 Difference]: With dead ends: 1020 [2022-02-15 01:14:13,487 INFO L226 Difference]: Without dead ends: 1018 [2022-02-15 01:14:13,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=584, Invalid=3198, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:14:13,488 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 189 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:13,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 73 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:14:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-02-15 01:14:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 915. [2022-02-15 01:14:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 867 states have (on average 1.1891580161476356) internal successors, (1031), 887 states have internal predecessors, (1031), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 12 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-15 01:14:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1095 transitions. [2022-02-15 01:14:14,454 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1095 transitions. Word has length 63 [2022-02-15 01:14:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:14,455 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1095 transitions. [2022-02-15 01:14:14,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1095 transitions. [2022-02-15 01:14:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:14:14,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:14,456 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:14,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:14:14,456 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:14,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1311450161, now seen corresponding path program 22 times [2022-02-15 01:14:14,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:14,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768604369] [2022-02-15 01:14:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:14,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:14,458 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:14,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:14,460 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:15,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:15,219 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:15,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768604369] [2022-02-15 01:14:15,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [768604369] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:15,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:15,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:14:15,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226446313] [2022-02-15 01:14:15,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:15,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:14:15,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:14:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:14:15,220 INFO L87 Difference]: Start difference. First operand 915 states and 1095 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:18,046 INFO L93 Difference]: Finished difference Result 1189 states and 1426 transitions. [2022-02-15 01:14:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:14:18,046 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2022-02-15 01:14:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:18,048 INFO L225 Difference]: With dead ends: 1189 [2022-02-15 01:14:18,048 INFO L226 Difference]: Without dead ends: 1187 [2022-02-15 01:14:18,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=610, Invalid=4502, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:14:18,049 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 393 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:18,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 62 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:14:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-02-15 01:14:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 936. [2022-02-15 01:14:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 888 states have (on average 1.1925675675675675) internal successors, (1059), 908 states have internal predecessors, (1059), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 12 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-15 01:14:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1123 transitions. [2022-02-15 01:14:19,016 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1123 transitions. Word has length 63 [2022-02-15 01:14:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:19,017 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1123 transitions. [2022-02-15 01:14:19,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1123 transitions. [2022-02-15 01:14:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:14:19,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:19,018 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:19,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:14:19,018 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash -500007896, now seen corresponding path program 10 times [2022-02-15 01:14:19,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:19,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174834750] [2022-02-15 01:14:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:19,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:19,020 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:19,021 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:19,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:19,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:14:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:19,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 01:14:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:19,501 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:19,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174834750] [2022-02-15 01:14:19,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [174834750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:19,501 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:19,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:14:19,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761285994] [2022-02-15 01:14:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:19,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:14:19,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:19,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:14:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:14:19,502 INFO L87 Difference]: Start difference. First operand 936 states and 1123 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:21,759 INFO L93 Difference]: Finished difference Result 1012 states and 1212 transitions. [2022-02-15 01:14:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:14:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-15 01:14:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:21,761 INFO L225 Difference]: With dead ends: 1012 [2022-02-15 01:14:21,761 INFO L226 Difference]: Without dead ends: 952 [2022-02-15 01:14:21,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=498, Invalid=3162, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:14:21,761 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 160 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:21,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 95 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:14:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-15 01:14:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 887. [2022-02-15 01:14:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 841 states have (on average 1.1961950059453033) internal successors, (1006), 860 states have internal predecessors, (1006), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 11 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-15 01:14:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1066 transitions. [2022-02-15 01:14:22,674 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1066 transitions. Word has length 66 [2022-02-15 01:14:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:22,674 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1066 transitions. [2022-02-15 01:14:22,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1066 transitions. [2022-02-15 01:14:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:14:22,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:22,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:22,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:14:22,675 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash -683336596, now seen corresponding path program 13 times [2022-02-15 01:14:22,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:22,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249036691] [2022-02-15 01:14:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:22,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:22,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:22,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:22,678 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-02-15 01:14:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 01:14:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:23,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:23,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249036691] [2022-02-15 01:14:23,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [249036691] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:23,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:23,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:14:23,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662250388] [2022-02-15 01:14:23,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:23,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:14:23,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:14:23,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:14:23,338 INFO L87 Difference]: Start difference. First operand 887 states and 1066 transitions. Second operand has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:26,157 INFO L93 Difference]: Finished difference Result 939 states and 1125 transitions. [2022-02-15 01:14:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:14:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 66 [2022-02-15 01:14:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:26,160 INFO L225 Difference]: With dead ends: 939 [2022-02-15 01:14:26,160 INFO L226 Difference]: Without dead ends: 890 [2022-02-15 01:14:26,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=794, Invalid=4318, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:14:26,161 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 236 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:26,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 77 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:14:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-02-15 01:14:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 841. [2022-02-15 01:14:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 797 states have (on average 1.1982434127979924) internal successors, (955), 815 states have internal predecessors, (955), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 10 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 01:14:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1011 transitions. [2022-02-15 01:14:27,037 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1011 transitions. Word has length 66 [2022-02-15 01:14:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:27,037 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1011 transitions. [2022-02-15 01:14:27,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1011 transitions. [2022-02-15 01:14:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:14:27,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:27,039 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:27,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:14:27,039 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:27,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:27,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1145647575, now seen corresponding path program 18 times [2022-02-15 01:14:27,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:27,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573348394] [2022-02-15 01:14:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:27,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:27,041 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:27,042 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:27,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:27,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:27,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573348394] [2022-02-15 01:14:27,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [573348394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:27,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:27,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:14:27,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667000229] [2022-02-15 01:14:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:27,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:14:27,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:14:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:14:27,645 INFO L87 Difference]: Start difference. First operand 841 states and 1011 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:30,531 INFO L93 Difference]: Finished difference Result 952 states and 1139 transitions. [2022-02-15 01:14:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 01:14:30,532 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-15 01:14:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:30,533 INFO L225 Difference]: With dead ends: 952 [2022-02-15 01:14:30,533 INFO L226 Difference]: Without dead ends: 950 [2022-02-15 01:14:30,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=5340, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:14:30,534 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 236 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:30,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 105 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:14:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-02-15 01:14:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 829. [2022-02-15 01:14:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 787 states have (on average 1.1994917407878019) internal successors, (944), 803 states have internal predecessors, (944), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 10 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-15 01:14:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 996 transitions. [2022-02-15 01:14:31,403 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 996 transitions. Word has length 64 [2022-02-15 01:14:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:31,404 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 996 transitions. [2022-02-15 01:14:31,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 996 transitions. [2022-02-15 01:14:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:14:31,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:31,405 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:31,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:14:31,405 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:31,405 INFO L85 PathProgramCache]: Analyzing trace with hash 781141083, now seen corresponding path program 14 times [2022-02-15 01:14:31,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:31,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547792050] [2022-02-15 01:14:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:31,406 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:31,407 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:31,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:31,408 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:31,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:31,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 01:14:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:31,605 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:31,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547792050] [2022-02-15 01:14:31,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [547792050] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:31,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:31,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:14:31,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929869352] [2022-02-15 01:14:31,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:31,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:14:31,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:31,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:14:31,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:14:31,606 INFO L87 Difference]: Start difference. First operand 829 states and 996 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:34,783 INFO L93 Difference]: Finished difference Result 1055 states and 1267 transitions. [2022-02-15 01:14:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:14:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 01:14:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:34,785 INFO L225 Difference]: With dead ends: 1055 [2022-02-15 01:14:34,785 INFO L226 Difference]: Without dead ends: 1053 [2022-02-15 01:14:34,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=4785, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:14:34,790 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 232 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:34,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 144 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:14:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-02-15 01:14:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 847. [2022-02-15 01:14:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 803 states have (on average 1.1980074719800746) internal successors, (962), 821 states have internal predecessors, (962), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 10 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-15 01:14:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1018 transitions. [2022-02-15 01:14:35,753 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1018 transitions. Word has length 66 [2022-02-15 01:14:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:35,753 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1018 transitions. [2022-02-15 01:14:35,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:35,754 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1018 transitions. [2022-02-15 01:14:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:14:35,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:35,755 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:35,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:14:35,755 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:35,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 276895843, now seen corresponding path program 11 times [2022-02-15 01:14:35,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:35,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491156754] [2022-02-15 01:14:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:35,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:35,758 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:35,760 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:36,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:36,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 01:14:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:36,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:36,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491156754] [2022-02-15 01:14:36,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491156754] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:36,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:36,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:14:36,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180200239] [2022-02-15 01:14:36,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:36,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:14:36,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:14:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:14:36,634 INFO L87 Difference]: Start difference. First operand 847 states and 1018 transitions. Second operand has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:40,310 INFO L93 Difference]: Finished difference Result 991 states and 1186 transitions. [2022-02-15 01:14:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:14:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 01:14:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:40,312 INFO L225 Difference]: With dead ends: 991 [2022-02-15 01:14:40,312 INFO L226 Difference]: Without dead ends: 989 [2022-02-15 01:14:40,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=812, Invalid=7560, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 01:14:40,312 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 282 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:40,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 90 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:14:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-02-15 01:14:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 897. [2022-02-15 01:14:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 849 states have (on average 1.1955241460541814) internal successors, (1015), 869 states have internal predecessors, (1015), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (30), 11 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-15 01:14:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1077 transitions. [2022-02-15 01:14:41,330 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1077 transitions. Word has length 66 [2022-02-15 01:14:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:41,330 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1077 transitions. [2022-02-15 01:14:41,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1077 transitions. [2022-02-15 01:14:41,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:14:41,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:41,331 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:41,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:14:41,331 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -614168551, now seen corresponding path program 12 times [2022-02-15 01:14:41,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:41,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291350740] [2022-02-15 01:14:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:41,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:41,333 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:41,334 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:42,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:42,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 01:14:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:42,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:42,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291350740] [2022-02-15 01:14:42,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [291350740] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:42,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:42,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:14:42,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695208992] [2022-02-15 01:14:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:42,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:14:42,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:42,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:14:42,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:14:42,048 INFO L87 Difference]: Start difference. First operand 897 states and 1077 transitions. Second operand has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:45,715 INFO L93 Difference]: Finished difference Result 1115 states and 1337 transitions. [2022-02-15 01:14:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:14:45,715 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 01:14:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:45,717 INFO L225 Difference]: With dead ends: 1115 [2022-02-15 01:14:45,717 INFO L226 Difference]: Without dead ends: 1113 [2022-02-15 01:14:45,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=943, Invalid=7067, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 01:14:45,718 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 244 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:45,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 114 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:14:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-02-15 01:14:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 917. [2022-02-15 01:14:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 867 states have (on average 1.1949250288350635) internal successors, (1036), 887 states have internal predecessors, (1036), 33 states have call successors, (33), 17 states have call predecessors, (33), 16 states have return successors, (31), 12 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-15 01:14:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1100 transitions. [2022-02-15 01:14:46,769 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1100 transitions. Word has length 66 [2022-02-15 01:14:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:46,769 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1100 transitions. [2022-02-15 01:14:46,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:14:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1100 transitions. [2022-02-15 01:14:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:14:46,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:46,770 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:46,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:14:46,771 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -275259755, now seen corresponding path program 15 times [2022-02-15 01:14:46,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:46,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043226854] [2022-02-15 01:14:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:46,772 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:46,772 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:46,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:46,774 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:47,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:47,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:14:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:47,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:14:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:47,235 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:47,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043226854] [2022-02-15 01:14:47,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043226854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:47,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:47,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:14:47,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245414086] [2022-02-15 01:14:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:47,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:14:47,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:14:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:14:47,236 INFO L87 Difference]: Start difference. First operand 917 states and 1100 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:49,676 INFO L93 Difference]: Finished difference Result 1080 states and 1296 transitions. [2022-02-15 01:14:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:14:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-15 01:14:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:49,678 INFO L225 Difference]: With dead ends: 1080 [2022-02-15 01:14:49,678 INFO L226 Difference]: Without dead ends: 1078 [2022-02-15 01:14:49,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:14:49,679 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:49,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 71 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:14:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-02-15 01:14:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 940. [2022-02-15 01:14:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 885 states have (on average 1.190960451977401) internal successors, (1054), 908 states have internal predecessors, (1054), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (36), 14 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-15 01:14:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1128 transitions. [2022-02-15 01:14:50,817 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1128 transitions. Word has length 68 [2022-02-15 01:14:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:50,818 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1128 transitions. [2022-02-15 01:14:50,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:50,818 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1128 transitions. [2022-02-15 01:14:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:14:50,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:50,820 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:50,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 01:14:50,820 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1734012123, now seen corresponding path program 16 times [2022-02-15 01:14:50,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:50,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66987867] [2022-02-15 01:14:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:50,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:50,822 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:50,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:50,824 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:14:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:51,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:14:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:51,159 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:51,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66987867] [2022-02-15 01:14:51,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [66987867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:51,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:51,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:14:51,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258769300] [2022-02-15 01:14:51,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:51,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:14:51,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:14:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:14:51,160 INFO L87 Difference]: Start difference. First operand 940 states and 1128 transitions. Second operand has 22 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:53,195 INFO L93 Difference]: Finished difference Result 1013 states and 1216 transitions. [2022-02-15 01:14:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:14:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-02-15 01:14:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:53,197 INFO L225 Difference]: With dead ends: 1013 [2022-02-15 01:14:53,197 INFO L226 Difference]: Without dead ends: 1011 [2022-02-15 01:14:53,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:14:53,201 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 157 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:53,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 62 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:14:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-02-15 01:14:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 950. [2022-02-15 01:14:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 892 states have (on average 1.1905829596412556) internal successors, (1062), 917 states have internal predecessors, (1062), 41 states have call successors, (41), 17 states have call predecessors, (41), 16 states have return successors, (39), 15 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-15 01:14:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1142 transitions. [2022-02-15 01:14:54,366 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1142 transitions. Word has length 68 [2022-02-15 01:14:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:54,366 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1142 transitions. [2022-02-15 01:14:54,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:14:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1142 transitions. [2022-02-15 01:14:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:14:54,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:54,368 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:54,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 01:14:54,368 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1737340720, now seen corresponding path program 23 times [2022-02-15 01:14:54,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:54,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065323036] [2022-02-15 01:14:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:54,369 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:14:54,369 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:14:54,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:54,371 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:14:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:55,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:55,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065323036] [2022-02-15 01:14:55,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2065323036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:55,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:55,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:14:55,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403005473] [2022-02-15 01:14:55,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:55,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:14:55,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:14:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:14:55,246 INFO L87 Difference]: Start difference. First operand 950 states and 1142 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:59,127 INFO L93 Difference]: Finished difference Result 1284 states and 1550 transitions. [2022-02-15 01:14:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:14:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:14:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:59,130 INFO L225 Difference]: With dead ends: 1284 [2022-02-15 01:14:59,130 INFO L226 Difference]: Without dead ends: 1282 [2022-02-15 01:14:59,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=671, Invalid=5809, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:14:59,130 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 379 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:59,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 99 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:14:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2022-02-15 01:15:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 983. [2022-02-15 01:15:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 921 states have (on average 1.1900108577633008) internal successors, (1096), 948 states have internal predecessors, (1096), 43 states have call successors, (43), 19 states have call predecessors, (43), 18 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 01:15:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1180 transitions. [2022-02-15 01:15:00,350 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1180 transitions. Word has length 66 [2022-02-15 01:15:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:00,351 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1180 transitions. [2022-02-15 01:15:00,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1180 transitions. [2022-02-15 01:15:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:00,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:00,352 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:00,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 01:15:00,353 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:00,353 INFO L85 PathProgramCache]: Analyzing trace with hash 688449750, now seen corresponding path program 24 times [2022-02-15 01:15:00,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:00,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040451947] [2022-02-15 01:15:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:00,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:00,355 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:00,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:00,357 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:00,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:00,857 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:00,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040451947] [2022-02-15 01:15:00,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040451947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:00,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:00,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:15:00,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142633885] [2022-02-15 01:15:00,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:00,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:15:00,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:15:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:15:00,858 INFO L87 Difference]: Start difference. First operand 983 states and 1180 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:04,219 INFO L93 Difference]: Finished difference Result 1175 states and 1411 transitions. [2022-02-15 01:15:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:15:04,219 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:04,221 INFO L225 Difference]: With dead ends: 1175 [2022-02-15 01:15:04,221 INFO L226 Difference]: Without dead ends: 1173 [2022-02-15 01:15:04,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=739, Invalid=4811, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:15:04,222 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 312 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:04,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 102 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:15:04,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-02-15 01:15:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 993. [2022-02-15 01:15:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 930 states have (on average 1.1903225806451614) internal successors, (1107), 957 states have internal predecessors, (1107), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 01:15:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1191 transitions. [2022-02-15 01:15:05,467 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1191 transitions. Word has length 66 [2022-02-15 01:15:05,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:05,468 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 1191 transitions. [2022-02-15 01:15:05,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1191 transitions. [2022-02-15 01:15:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:05,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:05,469 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:05,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 01:15:05,469 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:05,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1136950192, now seen corresponding path program 25 times [2022-02-15 01:15:05,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:05,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474081761] [2022-02-15 01:15:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:05,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:05,471 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:05,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:05,472 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:05,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:06,002 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:06,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474081761] [2022-02-15 01:15:06,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474081761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:06,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:06,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:15:06,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616006462] [2022-02-15 01:15:06,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:06,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:15:06,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:15:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:15:06,003 INFO L87 Difference]: Start difference. First operand 993 states and 1191 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:09,692 INFO L93 Difference]: Finished difference Result 1206 states and 1444 transitions. [2022-02-15 01:15:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 01:15:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:09,695 INFO L225 Difference]: With dead ends: 1206 [2022-02-15 01:15:09,695 INFO L226 Difference]: Without dead ends: 1204 [2022-02-15 01:15:09,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=749, Invalid=5257, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:15:09,696 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 339 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:09,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 119 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2232 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:15:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-02-15 01:15:11,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1005. [2022-02-15 01:15:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 942 states have (on average 1.1921443736730362) internal successors, (1123), 969 states have internal predecessors, (1123), 43 states have call successors, (43), 20 states have call predecessors, (43), 19 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 01:15:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1207 transitions. [2022-02-15 01:15:11,034 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1207 transitions. Word has length 66 [2022-02-15 01:15:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:11,034 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1207 transitions. [2022-02-15 01:15:11,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1207 transitions. [2022-02-15 01:15:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:11,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:11,035 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:11,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 01:15:11,035 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1971314326, now seen corresponding path program 26 times [2022-02-15 01:15:11,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:11,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123418100] [2022-02-15 01:15:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:11,037 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:11,037 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:11,038 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:11,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:11,704 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:11,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123418100] [2022-02-15 01:15:11,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123418100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:11,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:11,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:15:11,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64656555] [2022-02-15 01:15:11,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:11,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:15:11,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:15:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:15:11,705 INFO L87 Difference]: Start difference. First operand 1005 states and 1207 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-02-15 01:15:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:14,628 INFO L93 Difference]: Finished difference Result 1114 states and 1330 transitions. [2022-02-15 01:15:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:15:14,629 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 66 [2022-02-15 01:15:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:14,631 INFO L225 Difference]: With dead ends: 1114 [2022-02-15 01:15:14,631 INFO L226 Difference]: Without dead ends: 1112 [2022-02-15 01:15:14,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=552, Invalid=4140, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:15:14,631 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 226 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:14,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 90 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:15:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-02-15 01:15:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1009. [2022-02-15 01:15:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 945 states have (on average 1.1915343915343914) internal successors, (1126), 972 states have internal predecessors, (1126), 43 states have call successors, (43), 21 states have call predecessors, (43), 20 states have return successors, (41), 15 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-15 01:15:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1210 transitions. [2022-02-15 01:15:15,987 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1210 transitions. Word has length 66 [2022-02-15 01:15:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:15,987 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1210 transitions. [2022-02-15 01:15:15,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-02-15 01:15:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1210 transitions. [2022-02-15 01:15:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:15,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:15,989 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:15,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 01:15:15,989 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2061955934, now seen corresponding path program 27 times [2022-02-15 01:15:15,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:15,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382976787] [2022-02-15 01:15:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:15,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:15,991 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:15,992 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:16,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:16,771 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:16,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382976787] [2022-02-15 01:15:16,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [382976787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:16,771 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:16,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:15:16,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697277963] [2022-02-15 01:15:16,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:16,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:15:16,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:16,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:15:16,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:15:16,772 INFO L87 Difference]: Start difference. First operand 1009 states and 1210 transitions. Second operand has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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) [2022-02-15 01:15:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:20,044 INFO L93 Difference]: Finished difference Result 1260 states and 1508 transitions. [2022-02-15 01:15:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:15:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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 66 [2022-02-15 01:15:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:20,047 INFO L225 Difference]: With dead ends: 1260 [2022-02-15 01:15:20,047 INFO L226 Difference]: Without dead ends: 1258 [2022-02-15 01:15:20,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:15:20,047 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:20,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 104 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:15:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-02-15 01:15:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1040. [2022-02-15 01:15:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 978 states have (on average 1.1932515337423313) internal successors, (1167), 1005 states have internal predecessors, (1167), 41 states have call successors, (41), 21 states have call predecessors, (41), 20 states have return successors, (39), 13 states have call predecessors, (39), 39 states have call successors, (39) [2022-02-15 01:15:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1247 transitions. [2022-02-15 01:15:21,477 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1247 transitions. Word has length 66 [2022-02-15 01:15:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:21,477 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1247 transitions. [2022-02-15 01:15:21,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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) [2022-02-15 01:15:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1247 transitions. [2022-02-15 01:15:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:21,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:21,479 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:21,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 01:15:21,479 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:21,479 INFO L85 PathProgramCache]: Analyzing trace with hash -140337438, now seen corresponding path program 28 times [2022-02-15 01:15:21,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:21,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397329106] [2022-02-15 01:15:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:21,481 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:21,481 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:21,482 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:22,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:22,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397329106] [2022-02-15 01:15:22,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397329106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:22,056 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:22,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:15:22,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280367736] [2022-02-15 01:15:22,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:22,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:15:22,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:15:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:15:22,056 INFO L87 Difference]: Start difference. First operand 1040 states and 1247 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:25,525 INFO L93 Difference]: Finished difference Result 1235 states and 1484 transitions. [2022-02-15 01:15:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:15:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:25,528 INFO L225 Difference]: With dead ends: 1235 [2022-02-15 01:15:25,528 INFO L226 Difference]: Without dead ends: 1233 [2022-02-15 01:15:25,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=553, Invalid=4003, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:15:25,528 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 194 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:25,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 86 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:15:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-02-15 01:15:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1107. [2022-02-15 01:15:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1039 states have (on average 1.1944177093358999) internal successors, (1241), 1071 states have internal predecessors, (1241), 46 states have call successors, (46), 22 states have call predecessors, (46), 21 states have return successors, (44), 13 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-15 01:15:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1331 transitions. [2022-02-15 01:15:27,042 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1331 transitions. Word has length 66 [2022-02-15 01:15:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:27,042 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1331 transitions. [2022-02-15 01:15:27,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1331 transitions. [2022-02-15 01:15:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:27,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:27,044 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:27,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 01:15:27,044 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:27,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1333008662, now seen corresponding path program 29 times [2022-02-15 01:15:27,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:27,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303147850] [2022-02-15 01:15:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:27,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:27,046 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:27,048 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:27,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:27,776 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:27,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303147850] [2022-02-15 01:15:27,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [303147850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:27,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:27,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:15:27,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669111043] [2022-02-15 01:15:27,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:27,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:15:27,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:15:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:15:27,777 INFO L87 Difference]: Start difference. First operand 1107 states and 1331 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:31,447 INFO L93 Difference]: Finished difference Result 1266 states and 1515 transitions. [2022-02-15 01:15:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:15:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:31,452 INFO L225 Difference]: With dead ends: 1266 [2022-02-15 01:15:31,452 INFO L226 Difference]: Without dead ends: 1264 [2022-02-15 01:15:31,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=714, Invalid=4836, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:15:31,453 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 179 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:31,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 103 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:15:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-15 01:15:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1114. [2022-02-15 01:15:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1045 states have (on average 1.1933014354066986) internal successors, (1247), 1077 states have internal predecessors, (1247), 46 states have call successors, (46), 23 states have call predecessors, (46), 22 states have return successors, (44), 13 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-15 01:15:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1337 transitions. [2022-02-15 01:15:32,987 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1337 transitions. Word has length 66 [2022-02-15 01:15:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:32,987 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1337 transitions. [2022-02-15 01:15:32,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1337 transitions. [2022-02-15 01:15:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:32,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:32,989 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:32,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 01:15:32,989 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1811130830, now seen corresponding path program 19 times [2022-02-15 01:15:32,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:32,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858445065] [2022-02-15 01:15:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:32,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:32,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:32,992 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:33,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:33,724 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:33,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858445065] [2022-02-15 01:15:33,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [858445065] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:33,725 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:33,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:15:33,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224655939] [2022-02-15 01:15:33,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:33,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:15:33,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:15:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:15:33,726 INFO L87 Difference]: Start difference. First operand 1114 states and 1337 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:37,661 INFO L93 Difference]: Finished difference Result 1344 states and 1617 transitions. [2022-02-15 01:15:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:15:37,662 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:37,664 INFO L225 Difference]: With dead ends: 1344 [2022-02-15 01:15:37,664 INFO L226 Difference]: Without dead ends: 1342 [2022-02-15 01:15:37,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=687, Invalid=5475, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:15:37,665 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 291 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2560 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 2560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:37,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 82 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 2560 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:15:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-02-15 01:15:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1127. [2022-02-15 01:15:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1055 states have (on average 1.1914691943127962) internal successors, (1257), 1089 states have internal predecessors, (1257), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 01:15:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1351 transitions. [2022-02-15 01:15:39,259 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1351 transitions. Word has length 66 [2022-02-15 01:15:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:39,259 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1351 transitions. [2022-02-15 01:15:39,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1351 transitions. [2022-02-15 01:15:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:39,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:39,261 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:39,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 01:15:39,261 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:39,261 INFO L85 PathProgramCache]: Analyzing trace with hash 624428052, now seen corresponding path program 20 times [2022-02-15 01:15:39,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:39,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811946846] [2022-02-15 01:15:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:39,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:39,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:39,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:39,264 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:39,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:39,958 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:39,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811946846] [2022-02-15 01:15:39,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [811946846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:39,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:39,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:15:39,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018152657] [2022-02-15 01:15:39,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:39,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:15:39,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:39,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:15:39,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:15:39,960 INFO L87 Difference]: Start difference. First operand 1127 states and 1351 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:44,134 INFO L93 Difference]: Finished difference Result 1398 states and 1680 transitions. [2022-02-15 01:15:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:15:44,135 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:44,137 INFO L225 Difference]: With dead ends: 1398 [2022-02-15 01:15:44,137 INFO L226 Difference]: Without dead ends: 1396 [2022-02-15 01:15:44,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=743, Invalid=6229, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:15:44,138 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 334 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:44,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 120 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:15:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-02-15 01:15:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1134. [2022-02-15 01:15:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1061 states have (on average 1.1913289349670122) internal successors, (1264), 1095 states have internal predecessors, (1264), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 01:15:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1358 transitions. [2022-02-15 01:15:45,766 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1358 transitions. Word has length 66 [2022-02-15 01:15:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:45,766 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 1358 transitions. [2022-02-15 01:15:45,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1358 transitions. [2022-02-15 01:15:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:45,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:45,767 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:45,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 01:15:45,768 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:45,768 INFO L85 PathProgramCache]: Analyzing trace with hash -337327382, now seen corresponding path program 21 times [2022-02-15 01:15:45,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:45,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570065233] [2022-02-15 01:15:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:45,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:45,769 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:45,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:45,770 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:46,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:46,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:46,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570065233] [2022-02-15 01:15:46,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [570065233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:46,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:46,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:15:46,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174507568] [2022-02-15 01:15:46,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:46,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:15:46,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:15:46,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:15:46,564 INFO L87 Difference]: Start difference. First operand 1134 states and 1358 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:49,759 INFO L93 Difference]: Finished difference Result 1264 states and 1514 transitions. [2022-02-15 01:15:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:15:49,759 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:49,761 INFO L225 Difference]: With dead ends: 1264 [2022-02-15 01:15:49,761 INFO L226 Difference]: Without dead ends: 1262 [2022-02-15 01:15:49,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=714, Invalid=3576, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:15:49,762 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 169 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:49,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 111 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:15:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-02-15 01:15:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1140. [2022-02-15 01:15:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1068 states have (on average 1.1919475655430711) internal successors, (1273), 1101 states have internal predecessors, (1273), 47 states have call successors, (47), 25 states have call predecessors, (47), 24 states have return successors, (45), 13 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-15 01:15:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1365 transitions. [2022-02-15 01:15:51,406 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1365 transitions. Word has length 66 [2022-02-15 01:15:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:51,406 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1365 transitions. [2022-02-15 01:15:51,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1365 transitions. [2022-02-15 01:15:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:15:51,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:51,407 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:51,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 01:15:51,408 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1584291114, now seen corresponding path program 22 times [2022-02-15 01:15:51,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:51,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820709317] [2022-02-15 01:15:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:51,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:51,409 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:51,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:51,411 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:52,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:52,281 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:52,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820709317] [2022-02-15 01:15:52,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820709317] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:52,281 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:52,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:15:52,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415796829] [2022-02-15 01:15:52,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:52,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:15:52,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:15:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:15:52,282 INFO L87 Difference]: Start difference. First operand 1140 states and 1365 transitions. Second operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:56,706 INFO L93 Difference]: Finished difference Result 1446 states and 1736 transitions. [2022-02-15 01:15:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:15:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 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 66 [2022-02-15 01:15:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:56,708 INFO L225 Difference]: With dead ends: 1446 [2022-02-15 01:15:56,708 INFO L226 Difference]: Without dead ends: 1444 [2022-02-15 01:15:56,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=698, Invalid=5622, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:15:56,709 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 288 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:56,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 124 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:15:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-02-15 01:15:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1156. [2022-02-15 01:15:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1081 states have (on average 1.1914893617021276) internal successors, (1288), 1116 states have internal predecessors, (1288), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 13 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-15 01:15:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1384 transitions. [2022-02-15 01:15:58,369 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1384 transitions. Word has length 66 [2022-02-15 01:15:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:58,369 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1384 transitions. [2022-02-15 01:15:58,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1384 transitions. [2022-02-15 01:15:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:15:58,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:58,370 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:58,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 01:15:58,371 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1360968119, now seen corresponding path program 13 times [2022-02-15 01:15:58,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:58,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865777343] [2022-02-15 01:15:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:58,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:15:58,372 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:15:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:58,374 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:15:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:59,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:59,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-15 01:15:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:59,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:15:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:59,283 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:59,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865777343] [2022-02-15 01:15:59,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865777343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:59,283 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:59,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:15:59,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641728720] [2022-02-15 01:15:59,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:59,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:15:59,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:15:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:15:59,284 INFO L87 Difference]: Start difference. First operand 1156 states and 1384 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:16:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:03,678 INFO L93 Difference]: Finished difference Result 1257 states and 1499 transitions. [2022-02-15 01:16:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:16:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 69 [2022-02-15 01:16:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:03,682 INFO L225 Difference]: With dead ends: 1257 [2022-02-15 01:16:03,682 INFO L226 Difference]: Without dead ends: 1208 [2022-02-15 01:16:03,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1186, Invalid=6124, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 01:16:03,683 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 214 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:03,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 117 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:16:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2022-02-15 01:16:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1162. [2022-02-15 01:16:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1087 states have (on average 1.1913523459061637) internal successors, (1295), 1122 states have internal predecessors, (1295), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 13 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-15 01:16:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1391 transitions. [2022-02-15 01:16:05,345 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1391 transitions. Word has length 69 [2022-02-15 01:16:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:05,346 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1391 transitions. [2022-02-15 01:16:05,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:16:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1391 transitions. [2022-02-15 01:16:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:16:05,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:05,347 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:05,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 01:16:05,347 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1755632320, now seen corresponding path program 14 times [2022-02-15 01:16:05,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:05,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781064643] [2022-02-15 01:16:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:05,349 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:05,349 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:05,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:05,351 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:06,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:16:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:06,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:06,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781064643] [2022-02-15 01:16:06,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781064643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:06,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:06,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:16:06,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41039001] [2022-02-15 01:16:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:06,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:16:06,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:16:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:16:06,214 INFO L87 Difference]: Start difference. First operand 1162 states and 1391 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:12,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:12,444 INFO L93 Difference]: Finished difference Result 1450 states and 1741 transitions. [2022-02-15 01:16:12,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:16:12,444 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 01:16:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:12,446 INFO L225 Difference]: With dead ends: 1450 [2022-02-15 01:16:12,446 INFO L226 Difference]: Without dead ends: 1448 [2022-02-15 01:16:12,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1517, Invalid=9613, Unknown=0, NotChecked=0, Total=11130 [2022-02-15 01:16:12,447 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 365 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:12,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 114 Invalid, 2451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:16:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2022-02-15 01:16:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1193. [2022-02-15 01:16:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1121 states have (on average 1.1935771632471008) internal successors, (1338), 1154 states have internal predecessors, (1338), 47 states have call successors, (47), 25 states have call predecessors, (47), 24 states have return successors, (45), 13 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-15 01:16:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1430 transitions. [2022-02-15 01:16:14,217 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1430 transitions. Word has length 69 [2022-02-15 01:16:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:14,217 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 1430 transitions. [2022-02-15 01:16:14,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1430 transitions. [2022-02-15 01:16:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:16:14,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:14,219 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:14,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 01:16:14,219 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1758967990, now seen corresponding path program 15 times [2022-02-15 01:16:14,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:14,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564836675] [2022-02-15 01:16:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:14,221 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:14,221 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:14,222 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:15,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:16:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:15,144 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:15,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564836675] [2022-02-15 01:16:15,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1564836675] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:15,144 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:15,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:16:15,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189988826] [2022-02-15 01:16:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:15,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:16:15,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:16:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:16:15,145 INFO L87 Difference]: Start difference. First operand 1193 states and 1430 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:19,306 INFO L93 Difference]: Finished difference Result 1321 states and 1583 transitions. [2022-02-15 01:16:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 01:16:19,307 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 01:16:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:19,308 INFO L225 Difference]: With dead ends: 1321 [2022-02-15 01:16:19,308 INFO L226 Difference]: Without dead ends: 1319 [2022-02-15 01:16:19,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=789, Invalid=6867, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 01:16:19,309 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 285 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:19,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 76 Invalid, 2374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:16:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-02-15 01:16:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1208. [2022-02-15 01:16:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1135 states have (on average 1.1938325991189427) internal successors, (1355), 1169 states have internal predecessors, (1355), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 01:16:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1449 transitions. [2022-02-15 01:16:21,046 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1449 transitions. Word has length 69 [2022-02-15 01:16:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:21,046 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1449 transitions. [2022-02-15 01:16:21,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1449 transitions. [2022-02-15 01:16:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:16:21,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:21,049 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:21,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 01:16:21,049 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:21,049 INFO L85 PathProgramCache]: Analyzing trace with hash -310743238, now seen corresponding path program 16 times [2022-02-15 01:16:21,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:21,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219371731] [2022-02-15 01:16:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:21,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:21,051 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:21,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:21,053 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:21,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:16:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:21,959 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:21,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219371731] [2022-02-15 01:16:21,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [219371731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:21,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:21,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:16:21,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907051144] [2022-02-15 01:16:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:21,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:16:21,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:16:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:16:21,960 INFO L87 Difference]: Start difference. First operand 1208 states and 1449 transitions. Second operand has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:26,672 INFO L93 Difference]: Finished difference Result 1359 states and 1631 transitions. [2022-02-15 01:16:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:16:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 01:16:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:26,674 INFO L225 Difference]: With dead ends: 1359 [2022-02-15 01:16:26,674 INFO L226 Difference]: Without dead ends: 1357 [2022-02-15 01:16:26,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1018, Invalid=7538, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:16:26,675 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 273 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:26,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 118 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:16:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-02-15 01:16:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1232. [2022-02-15 01:16:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1159 states have (on average 1.193270060396894) internal successors, (1383), 1193 states have internal predecessors, (1383), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 01:16:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1477 transitions. [2022-02-15 01:16:28,474 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1477 transitions. Word has length 69 [2022-02-15 01:16:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:28,474 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1477 transitions. [2022-02-15 01:16:28,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1477 transitions. [2022-02-15 01:16:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:16:28,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:28,476 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:28,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 01:16:28,476 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1053663758, now seen corresponding path program 17 times [2022-02-15 01:16:28,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:28,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278919943] [2022-02-15 01:16:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:28,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:28,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:28,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:28,479 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:16:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:29,258 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:29,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278919943] [2022-02-15 01:16:29,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [278919943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:29,258 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:29,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:16:29,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284588046] [2022-02-15 01:16:29,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:29,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:16:29,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:29,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:16:29,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:16:29,259 INFO L87 Difference]: Start difference. First operand 1232 states and 1477 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:33,666 INFO L93 Difference]: Finished difference Result 1402 states and 1685 transitions. [2022-02-15 01:16:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:16:33,666 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 01:16:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:33,668 INFO L225 Difference]: With dead ends: 1402 [2022-02-15 01:16:33,668 INFO L226 Difference]: Without dead ends: 1400 [2022-02-15 01:16:33,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=826, Invalid=5336, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:16:33,669 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:33,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 101 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:16:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-02-15 01:16:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1232. [2022-02-15 01:16:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1159 states have (on average 1.193270060396894) internal successors, (1383), 1193 states have internal predecessors, (1383), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 13 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 01:16:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1477 transitions. [2022-02-15 01:16:35,508 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1477 transitions. Word has length 69 [2022-02-15 01:16:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:35,508 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1477 transitions. [2022-02-15 01:16:35,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1477 transitions. [2022-02-15 01:16:35,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:16:35,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:35,512 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:35,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 01:16:35,512 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:35,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1944728152, now seen corresponding path program 18 times [2022-02-15 01:16:35,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:35,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872466481] [2022-02-15 01:16:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:35,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:35,513 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:35,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:35,515 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:36,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:36,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-15 01:16:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:36,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:36,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872466481] [2022-02-15 01:16:36,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872466481] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:36,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:36,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:16:36,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383512675] [2022-02-15 01:16:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:36,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:16:36,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:16:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:16:36,290 INFO L87 Difference]: Start difference. First operand 1232 states and 1477 transitions. Second operand has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:40,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:40,379 INFO L93 Difference]: Finished difference Result 1307 states and 1564 transitions. [2022-02-15 01:16:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:16:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 01:16:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:40,381 INFO L225 Difference]: With dead ends: 1307 [2022-02-15 01:16:40,381 INFO L226 Difference]: Without dead ends: 1305 [2022-02-15 01:16:40,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=724, Invalid=6248, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:16:40,382 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 168 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:40,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 107 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:16:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-02-15 01:16:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1226. [2022-02-15 01:16:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1154 states have (on average 1.194107452339688) internal successors, (1378), 1187 states have internal predecessors, (1378), 47 states have call successors, (47), 25 states have call predecessors, (47), 24 states have return successors, (45), 13 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-15 01:16:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1470 transitions. [2022-02-15 01:16:42,103 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1470 transitions. Word has length 69 [2022-02-15 01:16:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:42,103 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1470 transitions. [2022-02-15 01:16:42,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:16:42,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1470 transitions. [2022-02-15 01:16:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:16:42,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:42,105 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:42,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 01:16:42,105 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1004222264, now seen corresponding path program 17 times [2022-02-15 01:16:42,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:42,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882300124] [2022-02-15 01:16:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:42,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:42,106 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:42,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:42,108 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:42,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:42,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:16:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:42,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 01:16:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:42,474 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:42,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882300124] [2022-02-15 01:16:42,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [882300124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:42,474 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:42,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:16:42,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376303772] [2022-02-15 01:16:42,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:42,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:16:42,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:16:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:16:42,475 INFO L87 Difference]: Start difference. First operand 1226 states and 1470 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:16:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:45,817 INFO L93 Difference]: Finished difference Result 1369 states and 1643 transitions. [2022-02-15 01:16:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:16:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-15 01:16:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:45,819 INFO L225 Difference]: With dead ends: 1369 [2022-02-15 01:16:45,819 INFO L226 Difference]: Without dead ends: 1367 [2022-02-15 01:16:45,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=373, Invalid=2819, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:16:45,820 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 253 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:45,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 118 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:16:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-02-15 01:16:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1167. [2022-02-15 01:16:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1102 states have (on average 1.1978221415607986) internal successors, (1320), 1130 states have internal predecessors, (1320), 42 states have call successors, (42), 23 states have call predecessors, (42), 22 states have return successors, (40), 13 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-15 01:16:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1402 transitions. [2022-02-15 01:16:47,510 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1402 transitions. Word has length 71 [2022-02-15 01:16:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:47,510 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1402 transitions. [2022-02-15 01:16:47,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:16:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1402 transitions. [2022-02-15 01:16:47,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:16:47,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:47,511 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:47,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 01:16:47,511 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2022160008, now seen corresponding path program 18 times [2022-02-15 01:16:47,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:47,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921583707] [2022-02-15 01:16:47,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:47,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:47,513 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:47,514 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:48,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:48,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-02-15 01:16:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:48,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 01:16:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:48,117 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:48,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921583707] [2022-02-15 01:16:48,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1921583707] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:48,118 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:48,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:16:48,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124898026] [2022-02-15 01:16:48,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:48,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:16:48,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:16:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:16:48,119 INFO L87 Difference]: Start difference. First operand 1167 states and 1402 transitions. Second operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:16:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:51,968 INFO L93 Difference]: Finished difference Result 1271 states and 1525 transitions. [2022-02-15 01:16:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:16:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2022-02-15 01:16:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:51,971 INFO L225 Difference]: With dead ends: 1271 [2022-02-15 01:16:51,971 INFO L226 Difference]: Without dead ends: 1269 [2022-02-15 01:16:51,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=531, Invalid=4299, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:16:51,972 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 251 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:51,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 106 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:16:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-02-15 01:16:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1237. [2022-02-15 01:16:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1166 states have (on average 1.1938250428816466) internal successors, (1392), 1196 states have internal predecessors, (1392), 47 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (45), 16 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-15 01:16:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1484 transitions. [2022-02-15 01:16:53,795 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1484 transitions. Word has length 71 [2022-02-15 01:16:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:53,796 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1484 transitions. [2022-02-15 01:16:53,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:16:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1484 transitions. [2022-02-15 01:16:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:16:53,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:53,797 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:53,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 01:16:53,797 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:53,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1795844299, now seen corresponding path program 30 times [2022-02-15 01:16:53,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:53,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906079488] [2022-02-15 01:16:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:53,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:16:53,799 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:16:53,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:53,801 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:16:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:54,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:54,186 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:54,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906079488] [2022-02-15 01:16:54,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [906079488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:54,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:54,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:16:54,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486837920] [2022-02-15 01:16:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:54,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:16:54,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:16:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:16:54,187 INFO L87 Difference]: Start difference. First operand 1237 states and 1484 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:01,744 INFO L93 Difference]: Finished difference Result 1993 states and 2427 transitions. [2022-02-15 01:17:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-15 01:17:01,745 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 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 69 [2022-02-15 01:17:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:01,748 INFO L225 Difference]: With dead ends: 1993 [2022-02-15 01:17:01,748 INFO L226 Difference]: Without dead ends: 1991 [2022-02-15 01:17:01,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8041 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1654, Invalid=20102, Unknown=0, NotChecked=0, Total=21756 [2022-02-15 01:17:01,750 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 540 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:01,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 81 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:17:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-02-15 01:17:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1369. [2022-02-15 01:17:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1294 states have (on average 1.206336939721793) internal successors, (1561), 1326 states have internal predecessors, (1561), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 16 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-15 01:17:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1657 transitions. [2022-02-15 01:17:03,854 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1657 transitions. Word has length 69 [2022-02-15 01:17:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:03,854 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 1657 transitions. [2022-02-15 01:17:03,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1657 transitions. [2022-02-15 01:17:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:17:03,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:03,856 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:03,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 01:17:03,856 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1094779721, now seen corresponding path program 23 times [2022-02-15 01:17:03,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:03,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121001304] [2022-02-15 01:17:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:03,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:03,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:03,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:03,859 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:03,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:03,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:03,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121001304] [2022-02-15 01:17:03,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [121001304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:03,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:03,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:17:03,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081593946] [2022-02-15 01:17:03,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:03,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:17:03,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:17:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:17:03,951 INFO L87 Difference]: Start difference. First operand 1369 states and 1657 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2022-02-15 01:17:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:07,530 INFO L93 Difference]: Finished difference Result 1618 states and 1973 transitions. [2022-02-15 01:17:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:17:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 69 [2022-02-15 01:17:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:07,533 INFO L225 Difference]: With dead ends: 1618 [2022-02-15 01:17:07,533 INFO L226 Difference]: Without dead ends: 1589 [2022-02-15 01:17:07,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=655, Invalid=1697, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:17:07,547 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 222 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:07,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 62 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:17:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-02-15 01:17:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1372. [2022-02-15 01:17:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1297 states have (on average 1.2058596761757903) internal successors, (1564), 1329 states have internal predecessors, (1564), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (47), 16 states have call predecessors, (47), 47 states have call successors, (47) [2022-02-15 01:17:09,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1660 transitions. [2022-02-15 01:17:09,710 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1660 transitions. Word has length 69 [2022-02-15 01:17:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:09,710 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 1660 transitions. [2022-02-15 01:17:09,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2022-02-15 01:17:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1660 transitions. [2022-02-15 01:17:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:17:09,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:09,712 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:09,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 01:17:09,712 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash -671758409, now seen corresponding path program 24 times [2022-02-15 01:17:09,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:09,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344483609] [2022-02-15 01:17:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:09,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:09,716 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:09,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:09,718 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:10,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:10,276 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:10,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344483609] [2022-02-15 01:17:10,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [344483609] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:10,276 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:10,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:17:10,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590070777] [2022-02-15 01:17:10,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:10,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:17:10,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:17:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:17:10,277 INFO L87 Difference]: Start difference. First operand 1372 states and 1660 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:17,278 INFO L93 Difference]: Finished difference Result 1713 states and 2060 transitions. [2022-02-15 01:17:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 01:17:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2022-02-15 01:17:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:17,281 INFO L225 Difference]: With dead ends: 1713 [2022-02-15 01:17:17,281 INFO L226 Difference]: Without dead ends: 1711 [2022-02-15 01:17:17,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 4 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1039, Invalid=9673, Unknown=0, NotChecked=0, Total=10712 [2022-02-15 01:17:17,282 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 388 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4672 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 4977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 4672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:17,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 172 Invalid, 4977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 4672 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:17:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2022-02-15 01:17:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1334. [2022-02-15 01:17:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1264 states have (on average 1.2080696202531647) internal successors, (1527), 1295 states have internal predecessors, (1527), 46 states have call successors, (46), 24 states have call predecessors, (46), 23 states have return successors, (44), 14 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-15 01:17:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1617 transitions. [2022-02-15 01:17:19,356 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1617 transitions. Word has length 69 [2022-02-15 01:17:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:19,356 INFO L470 AbstractCegarLoop]: Abstraction has 1334 states and 1617 transitions. [2022-02-15 01:17:19,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1617 transitions. [2022-02-15 01:17:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:17:19,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:19,358 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:19,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 01:17:19,358 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash -643408281, now seen corresponding path program 25 times [2022-02-15 01:17:19,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:19,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50163717] [2022-02-15 01:17:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:19,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:19,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:19,361 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:19,986 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:19,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50163717] [2022-02-15 01:17:19,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [50163717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:19,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:19,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:17:19,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795517190] [2022-02-15 01:17:19,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:19,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:17:19,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:17:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:17:19,988 INFO L87 Difference]: Start difference. First operand 1334 states and 1617 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:24,865 INFO L93 Difference]: Finished difference Result 1527 states and 1842 transitions. [2022-02-15 01:17:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:17:24,865 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2022-02-15 01:17:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:24,867 INFO L225 Difference]: With dead ends: 1527 [2022-02-15 01:17:24,867 INFO L226 Difference]: Without dead ends: 1525 [2022-02-15 01:17:24,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=764, Invalid=5716, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:17:24,868 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 349 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2817 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:24,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 140 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2817 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:17:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-02-15 01:17:26,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1368. [2022-02-15 01:17:26,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1297 states have (on average 1.210485736314572) internal successors, (1570), 1328 states have internal predecessors, (1570), 46 states have call successors, (46), 25 states have call predecessors, (46), 24 states have return successors, (44), 14 states have call predecessors, (44), 44 states have call successors, (44) [2022-02-15 01:17:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1660 transitions. [2022-02-15 01:17:26,932 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1660 transitions. Word has length 69 [2022-02-15 01:17:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:26,932 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1660 transitions. [2022-02-15 01:17:26,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1660 transitions. [2022-02-15 01:17:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:17:26,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:26,934 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:26,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 01:17:26,934 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1309954697, now seen corresponding path program 26 times [2022-02-15 01:17:26,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:26,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116103106] [2022-02-15 01:17:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:26,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:26,935 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:26,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:26,937 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:27,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:27,770 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:27,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116103106] [2022-02-15 01:17:27,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [116103106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:27,770 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:27,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:17:27,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313171337] [2022-02-15 01:17:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:27,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:17:27,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:17:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:17:27,771 INFO L87 Difference]: Start difference. First operand 1368 states and 1660 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:33,450 INFO L93 Difference]: Finished difference Result 1625 states and 1966 transitions. [2022-02-15 01:17:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 01:17:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2022-02-15 01:17:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:33,452 INFO L225 Difference]: With dead ends: 1625 [2022-02-15 01:17:33,452 INFO L226 Difference]: Without dead ends: 1623 [2022-02-15 01:17:33,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=709, Invalid=6601, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 01:17:33,453 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 313 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3071 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:33,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 111 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3071 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:17:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-02-15 01:17:35,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1402. [2022-02-15 01:17:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1328 states have (on average 1.2115963855421688) internal successors, (1609), 1361 states have internal predecessors, (1609), 48 states have call successors, (48), 26 states have call predecessors, (48), 25 states have return successors, (46), 14 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-15 01:17:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1703 transitions. [2022-02-15 01:17:35,543 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1703 transitions. Word has length 69 [2022-02-15 01:17:35,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:35,543 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 1703 transitions. [2022-02-15 01:17:35,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:35,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1703 transitions. [2022-02-15 01:17:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:17:35,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:35,545 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:35,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 01:17:35,545 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1869063899, now seen corresponding path program 27 times [2022-02-15 01:17:35,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:35,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916630129] [2022-02-15 01:17:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:35,554 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:35,554 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:35,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:35,556 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:36,431 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:36,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916630129] [2022-02-15 01:17:36,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1916630129] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:36,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:36,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:17:36,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039108603] [2022-02-15 01:17:36,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:36,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:17:36,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:17:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:17:36,432 INFO L87 Difference]: Start difference. First operand 1402 states and 1703 transitions. Second operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:42,098 INFO L93 Difference]: Finished difference Result 1701 states and 2063 transitions. [2022-02-15 01:17:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:17:42,099 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2022-02-15 01:17:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:42,116 INFO L225 Difference]: With dead ends: 1701 [2022-02-15 01:17:42,117 INFO L226 Difference]: Without dead ends: 1699 [2022-02-15 01:17:42,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=816, Invalid=6494, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 01:17:42,117 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 329 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:42,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 103 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:17:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-02-15 01:17:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1409. [2022-02-15 01:17:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1332 states have (on average 1.2102102102102101) internal successors, (1612), 1367 states have internal predecessors, (1612), 50 states have call successors, (50), 27 states have call predecessors, (50), 26 states have return successors, (48), 14 states have call predecessors, (48), 48 states have call successors, (48) [2022-02-15 01:17:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1710 transitions. [2022-02-15 01:17:44,370 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1710 transitions. Word has length 69 [2022-02-15 01:17:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:44,370 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 1710 transitions. [2022-02-15 01:17:44,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1710 transitions. [2022-02-15 01:17:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:17:44,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:44,371 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:44,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-15 01:17:44,372 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1475670698, now seen corresponding path program 19 times [2022-02-15 01:17:44,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:44,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029896505] [2022-02-15 01:17:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:44,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:44,376 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:44,378 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:45,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-02-15 01:17:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:45,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:17:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:45,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:45,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029896505] [2022-02-15 01:17:45,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029896505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:45,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:45,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:17:45,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600101795] [2022-02-15 01:17:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:45,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:17:45,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:17:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:17:45,363 INFO L87 Difference]: Start difference. First operand 1409 states and 1710 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:17:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:48,983 INFO L93 Difference]: Finished difference Result 1443 states and 1747 transitions. [2022-02-15 01:17:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:17:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-02-15 01:17:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:48,985 INFO L225 Difference]: With dead ends: 1443 [2022-02-15 01:17:48,985 INFO L226 Difference]: Without dead ends: 1423 [2022-02-15 01:17:48,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=486, Invalid=4626, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:17:48,986 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 141 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:48,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 94 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:17:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-02-15 01:17:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1403. [2022-02-15 01:17:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1326 states have (on average 1.2088989441930618) internal successors, (1603), 1361 states have internal predecessors, (1603), 50 states have call successors, (50), 27 states have call predecessors, (50), 26 states have return successors, (48), 14 states have call predecessors, (48), 48 states have call successors, (48) [2022-02-15 01:17:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1701 transitions. [2022-02-15 01:17:51,182 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1701 transitions. Word has length 72 [2022-02-15 01:17:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:51,183 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 1701 transitions. [2022-02-15 01:17:51,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:17:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1701 transitions. [2022-02-15 01:17:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:17:51,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:51,185 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:51,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-15 01:17:51,185 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -501669198, now seen corresponding path program 8 times [2022-02-15 01:17:51,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:51,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121393522] [2022-02-15 01:17:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:51,186 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:51,186 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:51,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:51,188 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:51,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-02-15 01:17:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:51,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:17:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:51,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 01:17:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:51,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:51,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121393522] [2022-02-15 01:17:51,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [121393522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:51,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:51,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:17:51,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901564687] [2022-02-15 01:17:51,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:51,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:17:51,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:51,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:17:51,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:17:51,576 INFO L87 Difference]: Start difference. First operand 1403 states and 1701 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:17:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:55,066 INFO L93 Difference]: Finished difference Result 1488 states and 1801 transitions. [2022-02-15 01:17:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:17:55,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 73 [2022-02-15 01:17:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:55,069 INFO L225 Difference]: With dead ends: 1488 [2022-02-15 01:17:55,069 INFO L226 Difference]: Without dead ends: 1486 [2022-02-15 01:17:55,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:17:55,070 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 172 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:55,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 110 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:17:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-02-15 01:17:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1465. [2022-02-15 01:17:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1374 states have (on average 1.2023289665211063) internal successors, (1652), 1414 states have internal predecessors, (1652), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (61), 22 states have call predecessors, (61), 61 states have call successors, (61) [2022-02-15 01:17:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1776 transitions. [2022-02-15 01:17:57,565 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1776 transitions. Word has length 73 [2022-02-15 01:17:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:57,565 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 1776 transitions. [2022-02-15 01:17:57,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:17:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1776 transitions. [2022-02-15 01:17:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:17:57,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:57,567 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:57,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-15 01:17:57,567 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:57,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1791898001, now seen corresponding path program 19 times [2022-02-15 01:17:57,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:57,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399949433] [2022-02-15 01:17:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:57,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:17:57,569 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:17:57,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:57,571 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:17:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:58,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 01:17:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:58,156 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:58,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399949433] [2022-02-15 01:17:58,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399949433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:58,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:58,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:17:58,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80469747] [2022-02-15 01:17:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:58,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:17:58,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:17:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:17:58,165 INFO L87 Difference]: Start difference. First operand 1465 states and 1776 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:03,228 INFO L93 Difference]: Finished difference Result 1653 states and 2000 transitions. [2022-02-15 01:18:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:18:03,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 01:18:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:03,230 INFO L225 Difference]: With dead ends: 1653 [2022-02-15 01:18:03,230 INFO L226 Difference]: Without dead ends: 1651 [2022-02-15 01:18:03,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=549, Invalid=4421, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:18:03,231 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 338 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:03,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 118 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:18:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-02-15 01:18:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1490. [2022-02-15 01:18:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1396 states have (on average 1.2020057306590257) internal successors, (1678), 1439 states have internal predecessors, (1678), 66 states have call successors, (66), 28 states have call predecessors, (66), 27 states have return successors, (64), 22 states have call predecessors, (64), 64 states have call successors, (64) [2022-02-15 01:18:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 1808 transitions. [2022-02-15 01:18:05,848 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 1808 transitions. Word has length 71 [2022-02-15 01:18:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:05,848 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 1808 transitions. [2022-02-15 01:18:05,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 1808 transitions. [2022-02-15 01:18:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:18:05,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:05,850 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:05,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-15 01:18:05,850 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:05,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2027609937, now seen corresponding path program 20 times [2022-02-15 01:18:05,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:05,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243237416] [2022-02-15 01:18:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:05,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:05,852 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:05,854 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:06,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:06,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 01:18:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:06,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:06,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243237416] [2022-02-15 01:18:06,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1243237416] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:06,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:06,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:18:06,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947084581] [2022-02-15 01:18:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:06,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:18:06,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:18:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:18:06,365 INFO L87 Difference]: Start difference. First operand 1490 states and 1808 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:13,736 INFO L93 Difference]: Finished difference Result 2107 states and 2584 transitions. [2022-02-15 01:18:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:18:13,737 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 01:18:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:13,740 INFO L225 Difference]: With dead ends: 2107 [2022-02-15 01:18:13,740 INFO L226 Difference]: Without dead ends: 2105 [2022-02-15 01:18:13,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 8 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=930, Invalid=8970, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 01:18:13,741 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 570 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 3261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:13,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 135 Invalid, 3261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2765 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:18:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2022-02-15 01:18:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1702. [2022-02-15 01:18:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1596 states have (on average 1.2117794486215538) internal successors, (1934), 1648 states have internal predecessors, (1934), 77 states have call successors, (77), 29 states have call predecessors, (77), 28 states have return successors, (75), 24 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-15 01:18:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 2086 transitions. [2022-02-15 01:18:16,880 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 2086 transitions. Word has length 71 [2022-02-15 01:18:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:16,880 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 2086 transitions. [2022-02-15 01:18:16,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 2086 transitions. [2022-02-15 01:18:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:18:16,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:16,882 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:16,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-15 01:18:16,882 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash 952313571, now seen corresponding path program 21 times [2022-02-15 01:18:16,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:16,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801420038] [2022-02-15 01:18:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:16,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:16,883 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:16,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:16,885 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:17,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:17,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 01:18:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:17,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:17,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801420038] [2022-02-15 01:18:17,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801420038] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:17,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:17,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:18:17,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995542264] [2022-02-15 01:18:17,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:17,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:18:17,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:18:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:18:17,178 INFO L87 Difference]: Start difference. First operand 1702 states and 2086 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:21,837 INFO L93 Difference]: Finished difference Result 1840 states and 2253 transitions. [2022-02-15 01:18:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:18:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 01:18:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:21,840 INFO L225 Difference]: With dead ends: 1840 [2022-02-15 01:18:21,840 INFO L226 Difference]: Without dead ends: 1838 [2022-02-15 01:18:21,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=2333, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:18:21,841 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 153 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:21,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 118 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:18:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2022-02-15 01:18:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1664. [2022-02-15 01:18:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1561 states have (on average 1.2101217168481742) internal successors, (1889), 1609 states have internal predecessors, (1889), 73 states have call successors, (73), 30 states have call predecessors, (73), 29 states have return successors, (71), 24 states have call predecessors, (71), 71 states have call successors, (71) [2022-02-15 01:18:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2033 transitions. [2022-02-15 01:18:24,885 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2033 transitions. Word has length 71 [2022-02-15 01:18:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:24,885 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 2033 transitions. [2022-02-15 01:18:24,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2033 transitions. [2022-02-15 01:18:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:18:24,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:24,889 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:24,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-15 01:18:24,889 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -945381923, now seen corresponding path program 22 times [2022-02-15 01:18:24,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:24,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549296464] [2022-02-15 01:18:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:24,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:24,890 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:24,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:24,892 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:25,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 01:18:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:25,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:25,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549296464] [2022-02-15 01:18:25,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549296464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:25,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:25,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:18:25,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955835964] [2022-02-15 01:18:25,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:25,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:18:25,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:25,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:18:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:18:25,376 INFO L87 Difference]: Start difference. First operand 1664 states and 2033 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:30,269 INFO L93 Difference]: Finished difference Result 1774 states and 2167 transitions. [2022-02-15 01:18:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:18:30,269 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 01:18:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:30,272 INFO L225 Difference]: With dead ends: 1774 [2022-02-15 01:18:30,272 INFO L226 Difference]: Without dead ends: 1772 [2022-02-15 01:18:30,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=398, Invalid=3384, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:18:30,272 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 224 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:30,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 127 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:18:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-02-15 01:18:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1669. [2022-02-15 01:18:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1568 states have (on average 1.2123724489795917) internal successors, (1901), 1615 states have internal predecessors, (1901), 71 states have call successors, (71), 30 states have call predecessors, (71), 29 states have return successors, (69), 23 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-15 01:18:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2041 transitions. [2022-02-15 01:18:33,281 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2041 transitions. Word has length 71 [2022-02-15 01:18:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:33,282 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 2041 transitions. [2022-02-15 01:18:33,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2041 transitions. [2022-02-15 01:18:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:18:33,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:33,284 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:33,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-15 01:18:33,285 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1767419357, now seen corresponding path program 23 times [2022-02-15 01:18:33,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:33,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521757322] [2022-02-15 01:18:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:33,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:33,286 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:33,288 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:33,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:33,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-02-15 01:18:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:33,752 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:33,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521757322] [2022-02-15 01:18:33,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521757322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:33,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:33,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:18:33,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958224902] [2022-02-15 01:18:33,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:33,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:18:33,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:33,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:18:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:18:33,753 INFO L87 Difference]: Start difference. First operand 1669 states and 2041 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:38,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:38,301 INFO L93 Difference]: Finished difference Result 1774 states and 2163 transitions. [2022-02-15 01:18:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:18:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 01:18:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:38,304 INFO L225 Difference]: With dead ends: 1774 [2022-02-15 01:18:38,304 INFO L226 Difference]: Without dead ends: 1772 [2022-02-15 01:18:38,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=3059, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:18:38,304 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 153 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:38,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 117 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:18:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-02-15 01:18:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1669. [2022-02-15 01:18:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1568 states have (on average 1.2123724489795917) internal successors, (1901), 1615 states have internal predecessors, (1901), 71 states have call successors, (71), 30 states have call predecessors, (71), 29 states have return successors, (69), 23 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-15 01:18:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2041 transitions. [2022-02-15 01:18:41,149 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2041 transitions. Word has length 71 [2022-02-15 01:18:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:41,149 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 2041 transitions. [2022-02-15 01:18:41,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2041 transitions. [2022-02-15 01:18:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:18:41,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:41,151 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:41,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-15 01:18:41,151 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2062115907, now seen corresponding path program 20 times [2022-02-15 01:18:41,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:41,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162958688] [2022-02-15 01:18:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:41,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:41,153 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:41,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:41,155 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:42,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:18:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:42,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:42,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162958688] [2022-02-15 01:18:42,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162958688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:42,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:42,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:18:42,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164910150] [2022-02-15 01:18:42,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:42,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:18:42,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:18:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:18:42,133 INFO L87 Difference]: Start difference. First operand 1669 states and 2041 transitions. Second operand has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:49,803 INFO L93 Difference]: Finished difference Result 1912 states and 2334 transitions. [2022-02-15 01:18:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 01:18:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 01:18:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:49,806 INFO L225 Difference]: With dead ends: 1912 [2022-02-15 01:18:49,806 INFO L226 Difference]: Without dead ends: 1910 [2022-02-15 01:18:49,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5421 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1881, Invalid=13869, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 01:18:49,807 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 340 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:49,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 133 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:18:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-02-15 01:18:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1723. [2022-02-15 01:18:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1616 states have (on average 1.2097772277227723) internal successors, (1955), 1666 states have internal predecessors, (1955), 76 states have call successors, (76), 31 states have call predecessors, (76), 30 states have return successors, (74), 25 states have call predecessors, (74), 74 states have call successors, (74) [2022-02-15 01:18:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2105 transitions. [2022-02-15 01:18:52,835 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2105 transitions. Word has length 72 [2022-02-15 01:18:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:52,835 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 2105 transitions. [2022-02-15 01:18:52,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:18:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2105 transitions. [2022-02-15 01:18:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:18:52,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:52,837 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:52,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-15 01:18:52,837 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1824795895, now seen corresponding path program 21 times [2022-02-15 01:18:52,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:52,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946526773] [2022-02-15 01:18:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:52,838 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:18:52,839 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:18:52,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:52,840 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:18:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:53,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:53,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:18:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:53,847 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:53,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946526773] [2022-02-15 01:18:53,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946526773] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:53,847 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:53,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:18:53,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014905208] [2022-02-15 01:18:53,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:53,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:18:53,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:53,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:18:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:18:53,848 INFO L87 Difference]: Start difference. First operand 1723 states and 2105 transitions. Second operand has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:01,385 INFO L93 Difference]: Finished difference Result 2020 states and 2476 transitions. [2022-02-15 01:19:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:19:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 01:19:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:01,388 INFO L225 Difference]: With dead ends: 2020 [2022-02-15 01:19:01,388 INFO L226 Difference]: Without dead ends: 2018 [2022-02-15 01:19:01,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1282, Invalid=7838, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 01:19:01,389 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 274 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2364 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 2364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:01,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 118 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 2364 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:19:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-02-15 01:19:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1767. [2022-02-15 01:19:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1657 states have (on average 1.2106216053108028) internal successors, (2006), 1708 states have internal predecessors, (2006), 78 states have call successors, (78), 32 states have call predecessors, (78), 31 states have return successors, (76), 26 states have call predecessors, (76), 76 states have call successors, (76) [2022-02-15 01:19:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2160 transitions. [2022-02-15 01:19:04,461 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2160 transitions. Word has length 72 [2022-02-15 01:19:04,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:04,461 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 2160 transitions. [2022-02-15 01:19:04,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 35 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:04,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2160 transitions. [2022-02-15 01:19:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:19:04,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:04,463 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:04,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-15 01:19:04,463 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:04,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1689804415, now seen corresponding path program 22 times [2022-02-15 01:19:04,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:04,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350615921] [2022-02-15 01:19:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:04,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:04,465 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:04,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:04,467 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:05,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:19:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:05,385 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:05,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350615921] [2022-02-15 01:19:05,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350615921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:05,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:05,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:19:05,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788763825] [2022-02-15 01:19:05,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:05,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:19:05,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:19:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:19:05,386 INFO L87 Difference]: Start difference. First operand 1767 states and 2160 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:12,167 INFO L93 Difference]: Finished difference Result 1910 states and 2333 transitions. [2022-02-15 01:19:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:19:12,168 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 01:19:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:12,170 INFO L225 Difference]: With dead ends: 1910 [2022-02-15 01:19:12,170 INFO L226 Difference]: Without dead ends: 1908 [2022-02-15 01:19:12,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1123, Invalid=9383, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:19:12,171 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 294 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 3118 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 3118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:12,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 132 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 3118 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:19:12,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2022-02-15 01:19:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1775. [2022-02-15 01:19:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1666 states have (on average 1.2112845138055222) internal successors, (2018), 1717 states have internal predecessors, (2018), 77 states have call successors, (77), 32 states have call predecessors, (77), 31 states have return successors, (75), 25 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-15 01:19:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2170 transitions. [2022-02-15 01:19:15,381 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2170 transitions. Word has length 72 [2022-02-15 01:19:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:15,381 INFO L470 AbstractCegarLoop]: Abstraction has 1775 states and 2170 transitions. [2022-02-15 01:19:15,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2170 transitions. [2022-02-15 01:19:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:19:15,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:15,383 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:15,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-15 01:19:15,383 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1751714111, now seen corresponding path program 23 times [2022-02-15 01:19:15,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:15,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140074239] [2022-02-15 01:19:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:15,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:15,387 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:15,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:15,388 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:16,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:19:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:16,351 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:16,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140074239] [2022-02-15 01:19:16,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140074239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:16,352 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:16,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:19:16,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599050603] [2022-02-15 01:19:16,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:16,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:19:16,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:19:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:19:16,352 INFO L87 Difference]: Start difference. First operand 1775 states and 2170 transitions. Second operand has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:22,560 INFO L93 Difference]: Finished difference Result 1853 states and 2265 transitions. [2022-02-15 01:19:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 01:19:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 01:19:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:22,563 INFO L225 Difference]: With dead ends: 1853 [2022-02-15 01:19:22,563 INFO L226 Difference]: Without dead ends: 1851 [2022-02-15 01:19:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1046, Invalid=8074, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 01:19:22,564 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 316 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2458 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 2458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:22,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 101 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 2458 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:19:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2022-02-15 01:19:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1786. [2022-02-15 01:19:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1674 states have (on average 1.2102747909199523) internal successors, (2026), 1726 states have internal predecessors, (2026), 79 states have call successors, (79), 33 states have call predecessors, (79), 32 states have return successors, (77), 26 states have call predecessors, (77), 77 states have call successors, (77) [2022-02-15 01:19:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2182 transitions. [2022-02-15 01:19:25,676 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2182 transitions. Word has length 72 [2022-02-15 01:19:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:25,676 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 2182 transitions. [2022-02-15 01:19:25,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2182 transitions. [2022-02-15 01:19:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:19:25,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:25,679 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:25,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-15 01:19:25,679 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:25,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2091436369, now seen corresponding path program 24 times [2022-02-15 01:19:25,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:25,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940227540] [2022-02-15 01:19:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:25,680 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:25,680 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:25,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:25,682 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:26,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:26,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:19:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:26,603 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:26,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940227540] [2022-02-15 01:19:26,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940227540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:26,603 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:26,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:19:26,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769925607] [2022-02-15 01:19:26,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:26,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:19:26,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:19:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:19:26,604 INFO L87 Difference]: Start difference. First operand 1786 states and 2182 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:34,216 INFO L93 Difference]: Finished difference Result 2010 states and 2448 transitions. [2022-02-15 01:19:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 01:19:34,216 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 01:19:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:34,219 INFO L225 Difference]: With dead ends: 2010 [2022-02-15 01:19:34,219 INFO L226 Difference]: Without dead ends: 2008 [2022-02-15 01:19:34,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4413 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1186, Invalid=11924, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:19:34,220 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 278 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 4428 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 4428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:34,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 111 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 4428 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:19:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2022-02-15 01:19:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1695. [2022-02-15 01:19:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1591 states have (on average 1.2099308610936519) internal successors, (1925), 1638 states have internal predecessors, (1925), 72 states have call successors, (72), 32 states have call predecessors, (72), 31 states have return successors, (70), 24 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-15 01:19:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2067 transitions. [2022-02-15 01:19:37,255 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2067 transitions. Word has length 72 [2022-02-15 01:19:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:37,256 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 2067 transitions. [2022-02-15 01:19:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2067 transitions. [2022-02-15 01:19:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:19:37,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:37,258 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:37,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-15 01:19:37,258 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1311069383, now seen corresponding path program 25 times [2022-02-15 01:19:37,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:37,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587458828] [2022-02-15 01:19:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:37,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:37,259 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:37,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:37,261 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:38,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-02-15 01:19:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:38,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:38,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587458828] [2022-02-15 01:19:38,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587458828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:38,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:38,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:19:38,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649975056] [2022-02-15 01:19:38,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:38,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:19:38,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:19:38,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:19:38,200 INFO L87 Difference]: Start difference. First operand 1695 states and 2067 transitions. Second operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:45,239 INFO L93 Difference]: Finished difference Result 1847 states and 2250 transitions. [2022-02-15 01:19:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:19:45,239 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 01:19:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:45,241 INFO L225 Difference]: With dead ends: 1847 [2022-02-15 01:19:45,241 INFO L226 Difference]: Without dead ends: 1845 [2022-02-15 01:19:45,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3362 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1012, Invalid=9290, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 01:19:45,242 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 253 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:45,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 132 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:19:45,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2022-02-15 01:19:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1695. [2022-02-15 01:19:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1591 states have (on average 1.2099308610936519) internal successors, (1925), 1638 states have internal predecessors, (1925), 72 states have call successors, (72), 32 states have call predecessors, (72), 31 states have return successors, (70), 24 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-15 01:19:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2067 transitions. [2022-02-15 01:19:48,115 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2067 transitions. Word has length 72 [2022-02-15 01:19:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:48,115 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 2067 transitions. [2022-02-15 01:19:48,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:19:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2067 transitions. [2022-02-15 01:19:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:19:48,117 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:48,117 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:48,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-15 01:19:48,117 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash 935343017, now seen corresponding path program 9 times [2022-02-15 01:19:48,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:48,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035405561] [2022-02-15 01:19:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:48,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:48,119 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:48,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:48,121 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:48,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:48,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-15 01:19:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:48,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-02-15 01:19:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:48,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:48,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035405561] [2022-02-15 01:19:48,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1035405561] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:48,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:48,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:19:48,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070697243] [2022-02-15 01:19:48,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:48,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:19:48,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:19:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:19:48,642 INFO L87 Difference]: Start difference. First operand 1695 states and 2067 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:19:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:55,351 INFO L93 Difference]: Finished difference Result 2158 states and 2647 transitions. [2022-02-15 01:19:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:19:55,351 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2022-02-15 01:19:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:55,354 INFO L225 Difference]: With dead ends: 2158 [2022-02-15 01:19:55,354 INFO L226 Difference]: Without dead ends: 2156 [2022-02-15 01:19:55,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=930, Invalid=5712, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 01:19:55,355 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 544 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:55,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 86 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:19:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2022-02-15 01:19:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1875. [2022-02-15 01:19:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1754 states have (on average 1.2126567844925884) internal successors, (2127), 1809 states have internal predecessors, (2127), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-15 01:19:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2299 transitions. [2022-02-15 01:19:58,786 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2299 transitions. Word has length 73 [2022-02-15 01:19:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:58,786 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 2299 transitions. [2022-02-15 01:19:58,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:19:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2299 transitions. [2022-02-15 01:19:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:19:58,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:58,805 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:58,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-15 01:19:58,805 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash 218298293, now seen corresponding path program 24 times [2022-02-15 01:19:58,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:58,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532677173] [2022-02-15 01:19:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:58,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:19:58,806 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:19:58,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:58,808 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:19:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:59,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:59,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 01:19:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:19:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:59,407 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:59,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532677173] [2022-02-15 01:19:59,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532677173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:59,407 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:59,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:19:59,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773811729] [2022-02-15 01:19:59,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:59,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:19:59,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:19:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:19:59,408 INFO L87 Difference]: Start difference. First operand 1875 states and 2299 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:20:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:04,757 INFO L93 Difference]: Finished difference Result 2006 states and 2456 transitions. [2022-02-15 01:20:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:20:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-15 01:20:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:04,760 INFO L225 Difference]: With dead ends: 2006 [2022-02-15 01:20:04,760 INFO L226 Difference]: Without dead ends: 2004 [2022-02-15 01:20:04,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:20:04,761 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 265 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:04,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 116 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:20:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2022-02-15 01:20:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1893. [2022-02-15 01:20:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1772 states have (on average 1.2133182844243793) internal successors, (2150), 1827 states have internal predecessors, (2150), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-15 01:20:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2322 transitions. [2022-02-15 01:20:08,406 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2322 transitions. Word has length 74 [2022-02-15 01:20:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:08,406 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2322 transitions. [2022-02-15 01:20:08,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:20:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2322 transitions. [2022-02-15 01:20:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:20:08,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:08,409 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:08,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-15 01:20:08,409 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:08,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:08,409 INFO L85 PathProgramCache]: Analyzing trace with hash 231121153, now seen corresponding path program 25 times [2022-02-15 01:20:08,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:08,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328219642] [2022-02-15 01:20:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:08,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:08,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:08,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:08,413 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:09,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-02-15 01:20:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:09,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:20:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:09,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:09,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328219642] [2022-02-15 01:20:09,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1328219642] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:09,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:09,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:20:09,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819335950] [2022-02-15 01:20:09,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:09,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:20:09,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:09,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:20:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:20:09,093 INFO L87 Difference]: Start difference. First operand 1893 states and 2322 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:20:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:14,535 INFO L93 Difference]: Finished difference Result 1957 states and 2398 transitions. [2022-02-15 01:20:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:20:14,535 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2022-02-15 01:20:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:14,537 INFO L225 Difference]: With dead ends: 1957 [2022-02-15 01:20:14,538 INFO L226 Difference]: Without dead ends: 1955 [2022-02-15 01:20:14,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:20:14,538 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 238 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:14,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 103 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:20:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2022-02-15 01:20:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1893. [2022-02-15 01:20:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1772 states have (on average 1.2133182844243793) internal successors, (2150), 1827 states have internal predecessors, (2150), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-15 01:20:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2322 transitions. [2022-02-15 01:20:17,936 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2322 transitions. Word has length 74 [2022-02-15 01:20:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:17,936 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 2322 transitions. [2022-02-15 01:20:17,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:20:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2322 transitions. [2022-02-15 01:20:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:20:17,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:17,938 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:17,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-15 01:20:17,939 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash 726069085, now seen corresponding path program 31 times [2022-02-15 01:20:17,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:17,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589983296] [2022-02-15 01:20:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:17,941 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:17,941 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:17,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:17,943 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:18,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:18,109 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:18,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589983296] [2022-02-15 01:20:18,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [589983296] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:18,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:18,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:20:18,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086638324] [2022-02-15 01:20:18,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:18,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:20:18,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:20:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:20:18,110 INFO L87 Difference]: Start difference. First operand 1893 states and 2322 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:24,500 INFO L93 Difference]: Finished difference Result 3550 states and 4431 transitions. [2022-02-15 01:20:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:20:24,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:20:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:24,505 INFO L225 Difference]: With dead ends: 3550 [2022-02-15 01:20:24,505 INFO L226 Difference]: Without dead ends: 2952 [2022-02-15 01:20:24,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:20:24,508 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 493 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:24,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 112 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:20:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-02-15 01:20:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2495. [2022-02-15 01:20:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2374 states have (on average 1.2207245155855098) internal successors, (2898), 2429 states have internal predecessors, (2898), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-15 01:20:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3070 transitions. [2022-02-15 01:20:28,836 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3070 transitions. Word has length 72 [2022-02-15 01:20:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:28,837 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 3070 transitions. [2022-02-15 01:20:28,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3070 transitions. [2022-02-15 01:20:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:20:28,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:28,839 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:28,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-15 01:20:28,840 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash -919244112, now seen corresponding path program 32 times [2022-02-15 01:20:28,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:28,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038139320] [2022-02-15 01:20:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:28,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:28,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:28,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:28,844 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:28,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:28,952 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:28,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038139320] [2022-02-15 01:20:28,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2038139320] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:28,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:28,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:20:28,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162647842] [2022-02-15 01:20:28,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:28,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:20:28,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:28,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:20:28,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:20:28,954 INFO L87 Difference]: Start difference. First operand 2495 states and 3070 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-02-15 01:20:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:35,558 INFO L93 Difference]: Finished difference Result 2887 states and 3562 transitions. [2022-02-15 01:20:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:20:35,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 72 [2022-02-15 01:20:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:35,561 INFO L225 Difference]: With dead ends: 2887 [2022-02-15 01:20:35,562 INFO L226 Difference]: Without dead ends: 2848 [2022-02-15 01:20:35,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=830, Invalid=1822, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:20:35,562 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 226 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:35,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 74 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:20:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2022-02-15 01:20:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2496. [2022-02-15 01:20:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2375 states have (on average 1.2197894736842105) internal successors, (2897), 2430 states have internal predecessors, (2897), 87 states have call successors, (87), 34 states have call predecessors, (87), 33 states have return successors, (85), 31 states have call predecessors, (85), 85 states have call successors, (85) [2022-02-15 01:20:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3069 transitions. [2022-02-15 01:20:40,038 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3069 transitions. Word has length 72 [2022-02-15 01:20:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:40,038 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 3069 transitions. [2022-02-15 01:20:40,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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) [2022-02-15 01:20:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3069 transitions. [2022-02-15 01:20:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:20:40,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:40,041 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:40,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-15 01:20:40,041 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash -218179534, now seen corresponding path program 28 times [2022-02-15 01:20:40,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:40,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986296704] [2022-02-15 01:20:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:40,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:40,042 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:40,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:40,046 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:40,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:40,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:40,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986296704] [2022-02-15 01:20:40,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986296704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:40,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:40,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:20:40,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103363395] [2022-02-15 01:20:40,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:40,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:20:40,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:40,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:20:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:20:40,391 INFO L87 Difference]: Start difference. First operand 2496 states and 3069 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:52,665 INFO L93 Difference]: Finished difference Result 3257 states and 4006 transitions. [2022-02-15 01:20:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-15 01:20:52,666 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 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 72 [2022-02-15 01:20:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:52,670 INFO L225 Difference]: With dead ends: 3257 [2022-02-15 01:20:52,670 INFO L226 Difference]: Without dead ends: 3255 [2022-02-15 01:20:52,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9846 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2688, Invalid=23072, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 01:20:52,671 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 549 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 3953 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 4521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 3953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:52,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 113 Invalid, 4521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 3953 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:20:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-02-15 01:20:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2680. [2022-02-15 01:20:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2540 states have (on average 1.2188976377952756) internal successors, (3096), 2608 states have internal predecessors, (3096), 100 states have call successors, (100), 40 states have call predecessors, (100), 39 states have return successors, (98), 31 states have call predecessors, (98), 98 states have call successors, (98) [2022-02-15 01:20:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3294 transitions. [2022-02-15 01:20:57,580 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3294 transitions. Word has length 72 [2022-02-15 01:20:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:57,580 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 3294 transitions. [2022-02-15 01:20:57,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3294 transitions. [2022-02-15 01:20:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:20:57,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:57,605 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:57,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-15 01:20:57,605 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1382753881, now seen corresponding path program 26 times [2022-02-15 01:20:57,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:57,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90228952] [2022-02-15 01:20:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:57,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:20:57,610 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:20:57,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:57,614 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:20:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:58,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:58,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-15 01:20:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:58,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 01:20:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:58,584 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:58,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90228952] [2022-02-15 01:20:58,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [90228952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:58,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:58,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:20:58,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109822005] [2022-02-15 01:20:58,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:58,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:20:58,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:58,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:20:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:20:58,591 INFO L87 Difference]: Start difference. First operand 2680 states and 3294 transitions. Second operand has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:21:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:05,490 INFO L93 Difference]: Finished difference Result 2731 states and 3350 transitions. [2022-02-15 01:21:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:21:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2022-02-15 01:21:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:05,494 INFO L225 Difference]: With dead ends: 2731 [2022-02-15 01:21:05,495 INFO L226 Difference]: Without dead ends: 2668 [2022-02-15 01:21:05,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=755, Invalid=7255, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 01:21:05,497 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 175 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:05,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 87 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:21:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2022-02-15 01:21:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2587. [2022-02-15 01:21:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2452 states have (on average 1.2226753670473083) internal successors, (2998), 2519 states have internal predecessors, (2998), 97 states have call successors, (97), 38 states have call predecessors, (97), 37 states have return successors, (96), 29 states have call predecessors, (96), 96 states have call successors, (96) [2022-02-15 01:21:10,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 3191 transitions. [2022-02-15 01:21:10,161 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 3191 transitions. Word has length 75 [2022-02-15 01:21:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:10,161 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 3191 transitions. [2022-02-15 01:21:10,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:21:10,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 3191 transitions. [2022-02-15 01:21:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:21:10,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:10,165 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:10,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-15 01:21:10,165 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash 139638767, now seen corresponding path program 26 times [2022-02-15 01:21:10,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:10,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309053997] [2022-02-15 01:21:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:10,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:10,166 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:10,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:10,169 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:10,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:10,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-15 01:21:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:21:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:10,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-15 01:21:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:10,458 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:10,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309053997] [2022-02-15 01:21:10,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [309053997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:10,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:10,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:21:10,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181983854] [2022-02-15 01:21:10,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:10,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:21:10,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:21:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:21:10,459 INFO L87 Difference]: Start difference. First operand 2587 states and 3191 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:21:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:16,553 INFO L93 Difference]: Finished difference Result 2705 states and 3335 transitions. [2022-02-15 01:21:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:21:16,553 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 76 [2022-02-15 01:21:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:16,556 INFO L225 Difference]: With dead ends: 2705 [2022-02-15 01:21:16,556 INFO L226 Difference]: Without dead ends: 2703 [2022-02-15 01:21:16,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:21:16,557 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 187 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:16,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 105 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:21:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2022-02-15 01:21:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2633. [2022-02-15 01:21:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2492 states have (on average 1.2215088282504012) internal successors, (3044), 2563 states have internal predecessors, (3044), 103 states have call successors, (103), 38 states have call predecessors, (103), 37 states have return successors, (102), 31 states have call predecessors, (102), 102 states have call successors, (102) [2022-02-15 01:21:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 3249 transitions. [2022-02-15 01:21:21,313 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 3249 transitions. Word has length 76 [2022-02-15 01:21:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 3249 transitions. [2022-02-15 01:21:21,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:21:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 3249 transitions. [2022-02-15 01:21:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:21:21,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:21,317 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:21,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-15 01:21:21,317 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:21,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1192708310, now seen corresponding path program 27 times [2022-02-15 01:21:21,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:21,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108755033] [2022-02-15 01:21:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:21,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:21,319 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:21,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:21,321 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:21:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:21,696 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:21,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108755033] [2022-02-15 01:21:21,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [108755033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:21,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:21,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:21:21,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125846468] [2022-02-15 01:21:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:21,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:21:21,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:21:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:21:21,697 INFO L87 Difference]: Start difference. First operand 2633 states and 3249 transitions. Second operand has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:21:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:32,017 INFO L93 Difference]: Finished difference Result 3223 states and 3971 transitions. [2022-02-15 01:21:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 01:21:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 01:21:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:32,021 INFO L225 Difference]: With dead ends: 3223 [2022-02-15 01:21:32,021 INFO L226 Difference]: Without dead ends: 3221 [2022-02-15 01:21:32,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3738 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=845, Invalid=10285, Unknown=0, NotChecked=0, Total=11130 [2022-02-15 01:21:32,022 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 471 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 3202 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 3202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:32,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 140 Invalid, 3610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 3202 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:21:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2022-02-15 01:21:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 2743. [2022-02-15 01:21:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2590 states have (on average 1.2204633204633204) internal successors, (3161), 2665 states have internal predecessors, (3161), 111 states have call successors, (111), 42 states have call predecessors, (111), 41 states have return successors, (110), 35 states have call predecessors, (110), 110 states have call successors, (110) [2022-02-15 01:21:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 3382 transitions. [2022-02-15 01:21:37,397 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 3382 transitions. Word has length 74 [2022-02-15 01:21:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:37,397 INFO L470 AbstractCegarLoop]: Abstraction has 2743 states and 3382 transitions. [2022-02-15 01:21:37,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:21:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 3382 transitions. [2022-02-15 01:21:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:21:37,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:37,400 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:37,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-15 01:21:37,400 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:37,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1837502160, now seen corresponding path program 28 times [2022-02-15 01:21:37,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:37,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446606533] [2022-02-15 01:21:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:37,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:37,410 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:37,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:37,413 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:37,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:37,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:21:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:37,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:37,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446606533] [2022-02-15 01:21:37,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [446606533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:37,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:37,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:21:37,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105637207] [2022-02-15 01:21:37,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:37,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:21:37,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:21:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:21:37,874 INFO L87 Difference]: Start difference. First operand 2743 states and 3382 transitions. Second operand has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:21:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:47,232 INFO L93 Difference]: Finished difference Result 3054 states and 3759 transitions. [2022-02-15 01:21:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 01:21:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 01:21:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:47,236 INFO L225 Difference]: With dead ends: 3054 [2022-02-15 01:21:47,236 INFO L226 Difference]: Without dead ends: 3052 [2022-02-15 01:21:47,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1074, Invalid=8432, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 01:21:47,237 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 375 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:47,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 133 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:21:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2022-02-15 01:21:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2795. [2022-02-15 01:21:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2635 states have (on average 1.220493358633776) internal successors, (3216), 2713 states have internal predecessors, (3216), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (115), 37 states have call predecessors, (115), 115 states have call successors, (115) [2022-02-15 01:21:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3447 transitions. [2022-02-15 01:21:52,575 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3447 transitions. Word has length 74 [2022-02-15 01:21:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:52,575 INFO L470 AbstractCegarLoop]: Abstraction has 2795 states and 3447 transitions. [2022-02-15 01:21:52,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:21:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3447 transitions. [2022-02-15 01:21:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:21:52,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:52,578 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:52,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-15 01:21:52,578 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:52,578 INFO L85 PathProgramCache]: Analyzing trace with hash -344034646, now seen corresponding path program 29 times [2022-02-15 01:21:52,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:52,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89882636] [2022-02-15 01:21:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:52,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:21:52,580 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:21:52,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:52,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:21:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:52,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:52,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:21:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:52,949 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:52,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89882636] [2022-02-15 01:21:52,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [89882636] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:52,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:52,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:21:52,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592723856] [2022-02-15 01:21:52,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:52,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:21:52,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:21:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:21:52,950 INFO L87 Difference]: Start difference. First operand 2795 states and 3447 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:00,542 INFO L93 Difference]: Finished difference Result 2948 states and 3630 transitions. [2022-02-15 01:22:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:22:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 01:22:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:00,546 INFO L225 Difference]: With dead ends: 2948 [2022-02-15 01:22:00,546 INFO L226 Difference]: Without dead ends: 2946 [2022-02-15 01:22:00,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:22:00,547 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 293 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:00,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 146 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:22:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-02-15 01:22:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2810. [2022-02-15 01:22:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2650 states have (on average 1.221132075471698) internal successors, (3236), 2728 states have internal predecessors, (3236), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (115), 37 states have call predecessors, (115), 115 states have call successors, (115) [2022-02-15 01:22:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 3467 transitions. [2022-02-15 01:22:06,030 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 3467 transitions. Word has length 74 [2022-02-15 01:22:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:06,031 INFO L470 AbstractCegarLoop]: Abstraction has 2810 states and 3467 transitions. [2022-02-15 01:22:06,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 3467 transitions. [2022-02-15 01:22:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:22:06,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:06,034 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:06,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-15 01:22:06,034 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1166072080, now seen corresponding path program 30 times [2022-02-15 01:22:06,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:06,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571224295] [2022-02-15 01:22:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:06,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:06,036 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:06,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:06,038 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:06,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:06,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:22:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:06,556 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:06,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571224295] [2022-02-15 01:22:06,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [571224295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:06,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:06,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:22:06,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256723139] [2022-02-15 01:22:06,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:06,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:22:06,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:06,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:22:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:22:06,557 INFO L87 Difference]: Start difference. First operand 2810 states and 3467 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:14,297 INFO L93 Difference]: Finished difference Result 2959 states and 3641 transitions. [2022-02-15 01:22:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:22:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 01:22:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:14,301 INFO L225 Difference]: With dead ends: 2959 [2022-02-15 01:22:14,301 INFO L226 Difference]: Without dead ends: 2957 [2022-02-15 01:22:14,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=512, Invalid=3778, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:22:14,302 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 286 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:14,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 130 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:22:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-02-15 01:22:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2809. [2022-02-15 01:22:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2650 states have (on average 1.221509433962264) internal successors, (3237), 2728 states have internal predecessors, (3237), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (114), 36 states have call predecessors, (114), 114 states have call successors, (114) [2022-02-15 01:22:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3466 transitions. [2022-02-15 01:22:19,617 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3466 transitions. Word has length 74 [2022-02-15 01:22:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:19,618 INFO L470 AbstractCegarLoop]: Abstraction has 2809 states and 3466 transitions. [2022-02-15 01:22:19,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3466 transitions. [2022-02-15 01:22:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:22:19,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:19,620 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:19,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-15 01:22:19,620 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:19,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1614776572, now seen corresponding path program 31 times [2022-02-15 01:22:19,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:19,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080582811] [2022-02-15 01:22:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:19,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:19,622 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:19,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:19,624 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:20,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:20,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:22:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:20,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:20,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080582811] [2022-02-15 01:22:20,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080582811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:20,157 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:20,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:22:20,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918299527] [2022-02-15 01:22:20,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:20,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:22:20,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:22:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:22:20,158 INFO L87 Difference]: Start difference. First operand 2809 states and 3466 transitions. Second operand has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:28,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:28,280 INFO L93 Difference]: Finished difference Result 2995 states and 3685 transitions. [2022-02-15 01:22:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:22:28,280 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 01:22:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:28,284 INFO L225 Difference]: With dead ends: 2995 [2022-02-15 01:22:28,284 INFO L226 Difference]: Without dead ends: 2993 [2022-02-15 01:22:28,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=496, Invalid=5510, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:22:28,284 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 244 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:28,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 141 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:22:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-02-15 01:22:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2815. [2022-02-15 01:22:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2656 states have (on average 1.2217620481927711) internal successors, (3245), 2734 states have internal predecessors, (3245), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (114), 36 states have call predecessors, (114), 114 states have call successors, (114) [2022-02-15 01:22:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 3474 transitions. [2022-02-15 01:22:33,696 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 3474 transitions. Word has length 74 [2022-02-15 01:22:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:33,696 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 3474 transitions. [2022-02-15 01:22:33,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 3474 transitions. [2022-02-15 01:22:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:22:33,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:33,699 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:33,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-15 01:22:33,700 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1089485352, now seen corresponding path program 27 times [2022-02-15 01:22:33,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:33,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309590375] [2022-02-15 01:22:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:33,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:33,701 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:33,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:33,703 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:33,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:34,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:34,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:34,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:22:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:34,606 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:34,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309590375] [2022-02-15 01:22:34,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309590375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:34,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:34,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:22:34,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811578880] [2022-02-15 01:22:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:34,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:22:34,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:22:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:22:34,607 INFO L87 Difference]: Start difference. First operand 2815 states and 3474 transitions. Second operand has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:43,405 INFO L93 Difference]: Finished difference Result 2974 states and 3663 transitions. [2022-02-15 01:22:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:22:43,406 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 01:22:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:43,409 INFO L225 Difference]: With dead ends: 2974 [2022-02-15 01:22:43,410 INFO L226 Difference]: Without dead ends: 2972 [2022-02-15 01:22:43,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=951, Invalid=8361, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:22:43,411 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 225 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:43,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 124 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:22:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2022-02-15 01:22:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2830. [2022-02-15 01:22:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2670 states have (on average 1.2217228464419476) internal successors, (3262), 2749 states have internal predecessors, (3262), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (115), 36 states have call predecessors, (115), 115 states have call successors, (115) [2022-02-15 01:22:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3493 transitions. [2022-02-15 01:22:48,931 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3493 transitions. Word has length 74 [2022-02-15 01:22:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:48,931 INFO L470 AbstractCegarLoop]: Abstraction has 2830 states and 3493 transitions. [2022-02-15 01:22:48,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3493 transitions. [2022-02-15 01:22:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:22:48,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:48,934 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:48,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-15 01:22:48,934 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash 267447918, now seen corresponding path program 28 times [2022-02-15 01:22:48,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:48,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067804924] [2022-02-15 01:22:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:48,935 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:22:48,935 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:22:48,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:48,937 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:22:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:49,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:49,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-02-15 01:22:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:49,783 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:49,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067804924] [2022-02-15 01:22:49,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067804924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:49,783 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:49,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:22:49,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350787986] [2022-02-15 01:22:49,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:22:49,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:22:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:22:49,784 INFO L87 Difference]: Start difference. First operand 2830 states and 3493 transitions. Second operand has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:22:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:59,104 INFO L93 Difference]: Finished difference Result 3047 states and 3753 transitions. [2022-02-15 01:22:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:22:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 01:22:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:59,109 INFO L225 Difference]: With dead ends: 3047 [2022-02-15 01:22:59,109 INFO L226 Difference]: Without dead ends: 3045 [2022-02-15 01:22:59,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3284 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=996, Invalid=9510, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:22:59,110 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 278 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:59,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 125 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:22:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2022-02-15 01:23:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2832. [2022-02-15 01:23:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2674 states have (on average 1.2228870605833957) internal successors, (3270), 2752 states have internal predecessors, (3270), 114 states have call successors, (114), 44 states have call predecessors, (114), 43 states have return successors, (113), 35 states have call predecessors, (113), 113 states have call successors, (113) [2022-02-15 01:23:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3497 transitions. [2022-02-15 01:23:04,602 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3497 transitions. Word has length 74 [2022-02-15 01:23:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:04,602 INFO L470 AbstractCegarLoop]: Abstraction has 2832 states and 3497 transitions. [2022-02-15 01:23:04,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:23:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3497 transitions. [2022-02-15 01:23:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:23:04,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:04,605 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:04,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-15 01:23:04,605 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1570581088, now seen corresponding path program 29 times [2022-02-15 01:23:04,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:04,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713849457] [2022-02-15 01:23:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:04,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:04,606 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:04,608 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 01:23:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:05,649 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:05,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713849457] [2022-02-15 01:23:05,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713849457] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:05,649 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:05,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:23:05,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629706972] [2022-02-15 01:23:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:05,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:23:05,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:05,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:23:05,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:23:05,650 INFO L87 Difference]: Start difference. First operand 2832 states and 3497 transitions. Second operand has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:23:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:15,224 INFO L93 Difference]: Finished difference Result 2984 states and 3682 transitions. [2022-02-15 01:23:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:23:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-15 01:23:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:15,228 INFO L225 Difference]: With dead ends: 2984 [2022-02-15 01:23:15,228 INFO L226 Difference]: Without dead ends: 2982 [2022-02-15 01:23:15,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2687 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1275, Invalid=8037, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:23:15,229 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 282 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:15,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 107 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:23:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-02-15 01:23:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2862. [2022-02-15 01:23:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2703 states have (on average 1.222345541990381) internal successors, (3304), 2782 states have internal predecessors, (3304), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (114), 35 states have call predecessors, (114), 114 states have call successors, (114) [2022-02-15 01:23:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 3533 transitions. [2022-02-15 01:23:20,887 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 3533 transitions. Word has length 75 [2022-02-15 01:23:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:20,887 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 3533 transitions. [2022-02-15 01:23:20,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:23:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 3533 transitions. [2022-02-15 01:23:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:23:20,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:20,890 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:20,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-15 01:23:20,890 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1100612134, now seen corresponding path program 30 times [2022-02-15 01:23:20,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:20,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705902498] [2022-02-15 01:23:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:20,894 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:20,894 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:20,900 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:21,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:21,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 01:23:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:21,823 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:21,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705902498] [2022-02-15 01:23:21,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [705902498] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:21,823 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:21,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:23:21,824 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864124251] [2022-02-15 01:23:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:21,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:23:21,824 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:23:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:23:21,824 INFO L87 Difference]: Start difference. First operand 2862 states and 3533 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:23:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:31,583 INFO L93 Difference]: Finished difference Result 3117 states and 3834 transitions. [2022-02-15 01:23:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 01:23:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-15 01:23:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:31,587 INFO L225 Difference]: With dead ends: 3117 [2022-02-15 01:23:31,587 INFO L226 Difference]: Without dead ends: 3115 [2022-02-15 01:23:31,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1098, Invalid=11112, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:23:31,588 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 278 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3944 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 4217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 3944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:31,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 156 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 3944 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:23:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-02-15 01:23:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2837. [2022-02-15 01:23:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2679 states have (on average 1.2228443449048152) internal successors, (3276), 2755 states have internal predecessors, (3276), 112 states have call successors, (112), 46 states have call predecessors, (112), 45 states have return successors, (111), 35 states have call predecessors, (111), 111 states have call successors, (111) [2022-02-15 01:23:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 3499 transitions. [2022-02-15 01:23:37,217 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 3499 transitions. Word has length 75 [2022-02-15 01:23:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:37,217 INFO L470 AbstractCegarLoop]: Abstraction has 2837 states and 3499 transitions. [2022-02-15 01:23:37,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:23:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 3499 transitions. [2022-02-15 01:23:37,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:23:37,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:37,220 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:37,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-15 01:23:37,220 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1589949918, now seen corresponding path program 31 times [2022-02-15 01:23:37,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:37,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293183617] [2022-02-15 01:23:37,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:37,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:37,222 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:37,224 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:38,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:38,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 01:23:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:38,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:38,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293183617] [2022-02-15 01:23:38,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [293183617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:38,126 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:38,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:23:38,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250004782] [2022-02-15 01:23:38,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:38,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:23:38,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:23:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:23:38,127 INFO L87 Difference]: Start difference. First operand 2837 states and 3499 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:23:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:48,630 INFO L93 Difference]: Finished difference Result 3017 states and 3717 transitions. [2022-02-15 01:23:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 01:23:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-15 01:23:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:48,634 INFO L225 Difference]: With dead ends: 3017 [2022-02-15 01:23:48,635 INFO L226 Difference]: Without dead ends: 3015 [2022-02-15 01:23:48,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1513, Invalid=10697, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:23:48,638 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 285 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 3457 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 3774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 3457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:48,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 134 Invalid, 3774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 3457 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:23:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2022-02-15 01:23:54,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2827. [2022-02-15 01:23:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2671 states have (on average 1.2235117933358293) internal successors, (3268), 2746 states have internal predecessors, (3268), 110 states have call successors, (110), 46 states have call predecessors, (110), 45 states have return successors, (109), 34 states have call predecessors, (109), 109 states have call successors, (109) [2022-02-15 01:23:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 3487 transitions. [2022-02-15 01:23:54,438 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 3487 transitions. Word has length 75 [2022-02-15 01:23:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:54,438 INFO L470 AbstractCegarLoop]: Abstraction has 2827 states and 3487 transitions. [2022-02-15 01:23:54,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:23:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 3487 transitions. [2022-02-15 01:23:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:23:54,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:54,440 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:54,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-15 01:23:54,440 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1924650392, now seen corresponding path program 32 times [2022-02-15 01:23:54,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:54,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479367690] [2022-02-15 01:23:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:54,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:23:54,442 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:23:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:54,444 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:23:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:55,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:55,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-15 01:23:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:55,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:55,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479367690] [2022-02-15 01:23:55,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479367690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:55,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:55,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:23:55,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037507227] [2022-02-15 01:23:55,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:55,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:23:55,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:55,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:23:55,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:23:55,405 INFO L87 Difference]: Start difference. First operand 2827 states and 3487 transitions. Second operand has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:24:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:04,040 INFO L93 Difference]: Finished difference Result 2935 states and 3617 transitions. [2022-02-15 01:24:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:24:04,041 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-15 01:24:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:04,044 INFO L225 Difference]: With dead ends: 2935 [2022-02-15 01:24:04,045 INFO L226 Difference]: Without dead ends: 2933 [2022-02-15 01:24:04,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=887, Invalid=6595, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:24:04,045 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 221 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:04,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 103 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:24:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2022-02-15 01:24:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2802. [2022-02-15 01:24:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2648 states have (on average 1.2235649546827794) internal successors, (3240), 2722 states have internal predecessors, (3240), 108 states have call successors, (108), 46 states have call predecessors, (108), 45 states have return successors, (107), 33 states have call predecessors, (107), 107 states have call successors, (107) [2022-02-15 01:24:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3455 transitions. [2022-02-15 01:24:09,793 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3455 transitions. Word has length 75 [2022-02-15 01:24:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:09,793 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 3455 transitions. [2022-02-15 01:24:09,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:24:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3455 transitions. [2022-02-15 01:24:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:24:09,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:09,796 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-15 01:24:09,796 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:09,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1231018404, now seen corresponding path program 32 times [2022-02-15 01:24:09,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:09,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697989754] [2022-02-15 01:24:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:09,798 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:09,798 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:09,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:09,800 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:24:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:10,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:10,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:24:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:10,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-15 01:24:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:10,351 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:10,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697989754] [2022-02-15 01:24:10,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697989754] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:10,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:10,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:24:10,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812030518] [2022-02-15 01:24:10,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:10,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:24:10,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:24:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:24:10,352 INFO L87 Difference]: Start difference. First operand 2802 states and 3455 transitions. Second operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:24:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:18,540 INFO L93 Difference]: Finished difference Result 3000 states and 3695 transitions. [2022-02-15 01:24:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:24:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2022-02-15 01:24:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:18,544 INFO L225 Difference]: With dead ends: 3000 [2022-02-15 01:24:18,544 INFO L226 Difference]: Without dead ends: 2998 [2022-02-15 01:24:18,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=404, Invalid=3018, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:24:18,545 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 217 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:18,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 78 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:24:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2022-02-15 01:24:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2887. [2022-02-15 01:24:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2720 states have (on average 1.2209558823529412) internal successors, (3321), 2800 states have internal predecessors, (3321), 120 states have call successors, (120), 47 states have call predecessors, (120), 46 states have return successors, (119), 39 states have call predecessors, (119), 119 states have call successors, (119) [2022-02-15 01:24:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3560 transitions. [2022-02-15 01:24:24,864 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3560 transitions. Word has length 76 [2022-02-15 01:24:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:24,864 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 3560 transitions. [2022-02-15 01:24:24,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:24:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3560 transitions. [2022-02-15 01:24:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:24:24,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:24,866 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:24,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-15 01:24:24,867 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1054677014, now seen corresponding path program 33 times [2022-02-15 01:24:24,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:24,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910509753] [2022-02-15 01:24:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:24,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:24,868 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:24,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:24,870 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:24:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:25,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:25,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-02-15 01:24:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-02-15 01:24:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:25,343 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:25,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910509753] [2022-02-15 01:24:25,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910509753] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:25,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:25,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:24:25,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546412134] [2022-02-15 01:24:25,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:25,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:24:25,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:24:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:24:25,344 INFO L87 Difference]: Start difference. First operand 2887 states and 3560 transitions. Second operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:24:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:33,441 INFO L93 Difference]: Finished difference Result 3160 states and 3899 transitions. [2022-02-15 01:24:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:24:33,441 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 76 [2022-02-15 01:24:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:33,445 INFO L225 Difference]: With dead ends: 3160 [2022-02-15 01:24:33,445 INFO L226 Difference]: Without dead ends: 3158 [2022-02-15 01:24:33,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=2512, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:24:33,446 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 261 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:33,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 66 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:24:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2022-02-15 01:24:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 2903. [2022-02-15 01:24:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2734 states have (on average 1.2216532553035846) internal successors, (3340), 2815 states have internal predecessors, (3340), 122 states have call successors, (122), 47 states have call predecessors, (122), 46 states have return successors, (121), 40 states have call predecessors, (121), 121 states have call successors, (121) [2022-02-15 01:24:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 3583 transitions. [2022-02-15 01:24:39,495 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 3583 transitions. Word has length 76 [2022-02-15 01:24:39,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:39,495 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 3583 transitions. [2022-02-15 01:24:39,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:24:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 3583 transitions. [2022-02-15 01:24:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:24:39,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:39,498 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:39,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-15 01:24:39,498 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:39,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1829961377, now seen corresponding path program 33 times [2022-02-15 01:24:39,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:39,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195755921] [2022-02-15 01:24:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:39,499 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:39,500 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:39,502 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:24:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:40,469 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:40,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195755921] [2022-02-15 01:24:40,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [195755921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:40,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:40,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:24:40,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307132400] [2022-02-15 01:24:40,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:40,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:24:40,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:24:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:24:40,470 INFO L87 Difference]: Start difference. First operand 2903 states and 3583 transitions. Second operand has 33 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2022-02-15 01:24:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:52,784 INFO L93 Difference]: Finished difference Result 3628 states and 4481 transitions. [2022-02-15 01:24:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 01:24:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 [2022-02-15 01:24:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:52,795 INFO L225 Difference]: With dead ends: 3628 [2022-02-15 01:24:52,796 INFO L226 Difference]: Without dead ends: 3626 [2022-02-15 01:24:52,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2817 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=850, Invalid=7892, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 01:24:52,797 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 625 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 3105 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:52,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 103 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3105 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:24:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2022-02-15 01:24:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3053. [2022-02-15 01:24:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 2870 states have (on average 1.221254355400697) internal successors, (3505), 2961 states have internal predecessors, (3505), 132 states have call successors, (132), 51 states have call predecessors, (132), 50 states have return successors, (131), 40 states have call predecessors, (131), 131 states have call successors, (131) [2022-02-15 01:24:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 3768 transitions. [2022-02-15 01:24:59,451 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 3768 transitions. Word has length 74 [2022-02-15 01:24:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:59,451 INFO L470 AbstractCegarLoop]: Abstraction has 3053 states and 3768 transitions. [2022-02-15 01:24:59,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 31 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) [2022-02-15 01:24:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 3768 transitions. [2022-02-15 01:24:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:24:59,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:59,454 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:59,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-02-15 01:24:59,454 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:59,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:59,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2140390705, now seen corresponding path program 34 times [2022-02-15 01:24:59,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:59,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833981012] [2022-02-15 01:24:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:59,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:24:59,455 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:24:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:59,457 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:24:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:00,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:00,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:00,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833981012] [2022-02-15 01:25:00,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [833981012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:00,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:00,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:25:00,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420942917] [2022-02-15 01:25:00,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:00,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:25:00,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:25:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:25:00,274 INFO L87 Difference]: Start difference. First operand 3053 states and 3768 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2022-02-15 01:25:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:09,800 INFO L93 Difference]: Finished difference Result 3369 states and 4150 transitions. [2022-02-15 01:25:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:25:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 [2022-02-15 01:25:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:09,806 INFO L225 Difference]: With dead ends: 3369 [2022-02-15 01:25:09,806 INFO L226 Difference]: Without dead ends: 3367 [2022-02-15 01:25:09,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=927, Invalid=4773, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:25:09,807 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 255 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:09,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 71 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:25:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2022-02-15 01:25:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 3137. [2022-02-15 01:25:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 2946 states have (on average 1.221317040054311) internal successors, (3598), 3042 states have internal predecessors, (3598), 137 states have call successors, (137), 54 states have call predecessors, (137), 53 states have return successors, (136), 40 states have call predecessors, (136), 136 states have call successors, (136) [2022-02-15 01:25:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 3871 transitions. [2022-02-15 01:25:16,774 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 3871 transitions. Word has length 74 [2022-02-15 01:25:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:16,775 INFO L470 AbstractCegarLoop]: Abstraction has 3137 states and 3871 transitions. [2022-02-15 01:25:16,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2022-02-15 01:25:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 3871 transitions. [2022-02-15 01:25:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:25:16,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:16,778 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:16,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-02-15 01:25:16,778 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash -232958095, now seen corresponding path program 35 times [2022-02-15 01:25:16,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:16,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123183267] [2022-02-15 01:25:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:16,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:16,779 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:16,782 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:17,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:17,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:17,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123183267] [2022-02-15 01:25:17,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [123183267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:17,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:17,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:25:17,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417435971] [2022-02-15 01:25:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:17,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:25:17,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:25:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:25:17,764 INFO L87 Difference]: Start difference. First operand 3137 states and 3871 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2022-02-15 01:25:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:28,254 INFO L93 Difference]: Finished difference Result 3457 states and 4255 transitions. [2022-02-15 01:25:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:25:28,254 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 [2022-02-15 01:25:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:28,259 INFO L225 Difference]: With dead ends: 3457 [2022-02-15 01:25:28,259 INFO L226 Difference]: Without dead ends: 3455 [2022-02-15 01:25:28,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=727, Invalid=6079, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:25:28,260 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 402 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:28,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 105 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:25:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2022-02-15 01:25:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3164. [2022-02-15 01:25:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 2974 states have (on average 1.222595830531271) internal successors, (3636), 3069 states have internal predecessors, (3636), 136 states have call successors, (136), 54 states have call predecessors, (136), 53 states have return successors, (135), 40 states have call predecessors, (135), 135 states have call successors, (135) [2022-02-15 01:25:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 3907 transitions. [2022-02-15 01:25:34,943 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 3907 transitions. Word has length 74 [2022-02-15 01:25:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 3164 states and 3907 transitions. [2022-02-15 01:25:34,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2022-02-15 01:25:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 3907 transitions. [2022-02-15 01:25:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:25:34,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:34,946 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 6, 6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:34,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-02-15 01:25:34,946 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1240388005, now seen corresponding path program 36 times [2022-02-15 01:25:34,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:34,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6287956] [2022-02-15 01:25:34,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:34,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:25:34,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:25:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:34,950 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:25:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:35,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:35,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:35,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6287956] [2022-02-15 01:25:35,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [6287956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:35,751 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:35,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:25:35,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269889366] [2022-02-15 01:25:35,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:35,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:25:35,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:25:35,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:25:35,752 INFO L87 Difference]: Start difference. First operand 3164 states and 3907 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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) [2022-02-15 01:25:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:46,086 INFO L93 Difference]: Finished difference Result 3550 states and 4374 transitions. [2022-02-15 01:25:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:25:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 [2022-02-15 01:25:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:46,091 INFO L225 Difference]: With dead ends: 3550 [2022-02-15 01:25:46,091 INFO L226 Difference]: Without dead ends: 3548 [2022-02-15 01:25:46,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1010, Invalid=4996, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:25:46,092 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 259 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:46,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 76 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:25:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states.