/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/array-crafted/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:31:45,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:31:45,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:31:46,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:31:46,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:31:46,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:31:46,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:31:46,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:31:46,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:31:46,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:31:46,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:31:46,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:31:46,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:31:46,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:31:46,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:31:46,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:31:46,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:31:46,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:31:46,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:31:46,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:31:46,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 19:31:46,080 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:31:46,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:31:46,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:31:46,082 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:31:46,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:31:46,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:31:46,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:31:46,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:31:46,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:31:46,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:31:46,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:31:46,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:31:46,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:31:46,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:31:46,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:31:46,084 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:31:46,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:31:46,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:31:46,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:31:46,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:31:46,269 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:31:46,270 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:31:46,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-31 19:31:46,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b597415/0352bdd0aba94b7f89d3ea2d2f5c0c82/FLAGd3735c954 [2022-01-31 19:31:46,728 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:31:46,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2022-01-31 19:31:46,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b597415/0352bdd0aba94b7f89d3ea2d2f5c0c82/FLAGd3735c954 [2022-01-31 19:31:46,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b597415/0352bdd0aba94b7f89d3ea2d2f5c0c82 [2022-01-31 19:31:46,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:31:46,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:31:46,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:31:46,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:31:46,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:31:46,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:31:46" (1/1) ... [2022-01-31 19:31:46,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44539135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:46, skipping insertion in model container [2022-01-31 19:31:46,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:31:46" (1/1) ... [2022-01-31 19:31:46,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:31:46,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:31:46,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c[406,419] [2022-01-31 19:31:47,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:31:47,029 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:31:47,050 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c[406,419] [2022-01-31 19:31:47,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:31:47,071 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:31:47,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47 WrapperNode [2022-01-31 19:31:47,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:31:47,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:31:47,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:31:47,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:31:47,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:31:47,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:31:47,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:31:47,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:31:47,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (1/1) ... [2022-01-31 19:31:47,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:31:47,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:31:47,181 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) [2022-01-31 19:31:47,186 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 [2022-01-31 19:31:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:31:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:31:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:31:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:31:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:31:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:31:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:31:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:31:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:31:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:31:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:31:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:31:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-01-31 19:31:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 19:31:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:31:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 19:31:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:31:47,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:31:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:31:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:31:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:31:47,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:31:47,254 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:31:47,255 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:31:47,393 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:31:47,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:31:47,397 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 19:31:47,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:31:47 BoogieIcfgContainer [2022-01-31 19:31:47,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:31:47,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:31:47,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:31:47,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:31:47,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:31:46" (1/3) ... [2022-01-31 19:31:47,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f29d869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:31:47, skipping insertion in model container [2022-01-31 19:31:47,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:31:47" (2/3) ... [2022-01-31 19:31:47,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f29d869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:31:47, skipping insertion in model container [2022-01-31 19:31:47,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:31:47" (3/3) ... [2022-01-31 19:31:47,403 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2022-01-31 19:31:47,406 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:31:47,406 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:31:47,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:31:47,434 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 [2022-01-31 19:31:47,434 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:31:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 19:31:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 19:31:47,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:47,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:47,447 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:47,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1258601833, now seen corresponding path program 1 times [2022-01-31 19:31:47,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:47,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269715833] [2022-01-31 19:31:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:47,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:47,507 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:47,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269715833] [2022-01-31 19:31:47,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269715833] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:47,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:47,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:31:47,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087335979] [2022-01-31 19:31:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:47,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:31:47,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:31:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:31:47,684 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:47,753 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-01-31 19:31:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:31:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 19:31:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:47,759 INFO L225 Difference]: With dead ends: 47 [2022-01-31 19:31:47,759 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 19:31:47,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:31:47,766 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:47,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:31:47,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 19:31:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-31 19:31:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 19:31:47,789 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-01-31 19:31:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:47,789 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 19:31:47,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 19:31:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 19:31:47,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:47,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:47,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:31:47,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash -890444607, now seen corresponding path program 1 times [2022-01-31 19:31:47,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:47,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930899093] [2022-01-31 19:31:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:47,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:47,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:47,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:47,807 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:47,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:47,869 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:47,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930899093] [2022-01-31 19:31:47,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930899093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:47,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:47,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:31:47,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425783108] [2022-01-31 19:31:47,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:47,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:31:47,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:47,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:31:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:31:47,872 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:47,924 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-31 19:31:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:31:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 19:31:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:47,925 INFO L225 Difference]: With dead ends: 34 [2022-01-31 19:31:47,926 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 19:31:47,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:31:47,927 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:47,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:31:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 19:31:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-01-31 19:31:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-31 19:31:47,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2022-01-31 19:31:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:47,932 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-31 19:31:47,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-31 19:31:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 19:31:47,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:47,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:47,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:31:47,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 176586301, now seen corresponding path program 1 times [2022-01-31 19:31:47,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:47,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567516280] [2022-01-31 19:31:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:47,936 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:47,936 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:47,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:47,937 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:47,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567516280] [2022-01-31 19:31:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [567516280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:47,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:31:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604428897] [2022-01-31 19:31:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:31:47,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:31:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:31:47,996 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:48,027 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-01-31 19:31:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:31:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 19:31:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:48,028 INFO L225 Difference]: With dead ends: 38 [2022-01-31 19:31:48,028 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 19:31:48,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:31:48,029 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:48,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 25 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:31:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 19:31:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 19:31:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-31 19:31:48,034 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2022-01-31 19:31:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:48,035 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-31 19:31:48,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-31 19:31:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 19:31:48,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:48,036 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] [2022-01-31 19:31:48,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:31:48,036 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1141509093, now seen corresponding path program 2 times [2022-01-31 19:31:48,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:48,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853329241] [2022-01-31 19:31:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:48,038 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:48,038 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:48,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:48,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:48,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:48,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853329241] [2022-01-31 19:31:48,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1853329241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:48,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:48,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:31:48,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036272958] [2022-01-31 19:31:48,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:48,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:31:48,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:31:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:31:48,093 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:48,150 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-01-31 19:31:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:31:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 19:31:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:48,151 INFO L225 Difference]: With dead ends: 38 [2022-01-31 19:31:48,151 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 19:31:48,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:31:48,152 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:48,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:31:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 19:31:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 19:31:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 19:31:48,159 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-01-31 19:31:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:48,159 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 19:31:48,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 19:31:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 19:31:48,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:48,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:48,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:31:48,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:48,161 INFO L85 PathProgramCache]: Analyzing trace with hash 115949719, now seen corresponding path program 3 times [2022-01-31 19:31:48,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:48,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765590944] [2022-01-31 19:31:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:48,163 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:48,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:48,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:48,164 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:48,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:48,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:48,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765590944] [2022-01-31 19:31:48,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765590944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:48,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:48,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:31:48,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751365704] [2022-01-31 19:31:48,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:48,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:31:48,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:48,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:31:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:31:48,566 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) 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) [2022-01-31 19:31:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:48,758 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-01-31 19:31:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:31:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) 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 [2022-01-31 19:31:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:48,759 INFO L225 Difference]: With dead ends: 43 [2022-01-31 19:31:48,759 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 19:31:48,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:31:48,760 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:48,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 102 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 19:31:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-01-31 19:31:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-01-31 19:31:48,787 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2022-01-31 19:31:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:48,788 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-01-31 19:31:48,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) 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) [2022-01-31 19:31:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-01-31 19:31:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:31:48,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:48,789 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:48,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:31:48,789 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 771868533, now seen corresponding path program 4 times [2022-01-31 19:31:48,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:48,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103522261] [2022-01-31 19:31:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:48,794 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:48,795 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:48,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:48,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:48,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:48,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103522261] [2022-01-31 19:31:48,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103522261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:48,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:48,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:31:48,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544135664] [2022-01-31 19:31:48,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:48,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:31:48,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:31:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:31:48,872 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:48,974 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-01-31 19:31:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 19:31:48,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 19:31:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:48,976 INFO L225 Difference]: With dead ends: 68 [2022-01-31 19:31:48,976 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 19:31:48,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:31:48,977 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:48,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 19:31:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-01-31 19:31:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-31 19:31:48,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2022-01-31 19:31:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:48,985 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-31 19:31:48,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-31 19:31:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:31:48,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:48,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:48,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:31:48,986 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1080402029, now seen corresponding path program 5 times [2022-01-31 19:31:48,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:48,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345721475] [2022-01-31 19:31:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:48,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:48,988 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:48,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:48,989 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:49,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:49,062 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:49,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345721475] [2022-01-31 19:31:49,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345721475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:49,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:49,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:31:49,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245245682] [2022-01-31 19:31:49,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:49,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:31:49,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:31:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:31:49,063 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:49,186 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-01-31 19:31:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:31:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 19:31:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:49,188 INFO L225 Difference]: With dead ends: 40 [2022-01-31 19:31:49,188 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 19:31:49,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:31:49,189 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:49,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 49 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 19:31:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 19:31:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 19:31:49,196 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2022-01-31 19:31:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:49,196 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 19:31:49,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 19:31:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 19:31:49,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:49,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:49,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:31:49,197 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2129074033, now seen corresponding path program 6 times [2022-01-31 19:31:49,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:49,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430501950] [2022-01-31 19:31:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:49,199 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:49,199 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:49,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:49,200 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:49,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:49,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430501950] [2022-01-31 19:31:49,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [430501950] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:49,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:49,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:31:49,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015213567] [2022-01-31 19:31:49,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:49,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:31:49,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:31:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:31:49,891 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:50,337 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2022-01-31 19:31:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:31:50,338 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 19:31:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:50,338 INFO L225 Difference]: With dead ends: 51 [2022-01-31 19:31:50,338 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 19:31:50,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:31:50,339 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:50,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:31:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 19:31:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-01-31 19:31:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-01-31 19:31:50,346 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 34 [2022-01-31 19:31:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:50,347 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-01-31 19:31:50,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-01-31 19:31:50,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 19:31:50,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:50,347 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:50,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:31:50,348 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:50,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1645916209, now seen corresponding path program 7 times [2022-01-31 19:31:50,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:50,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280454731] [2022-01-31 19:31:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:50,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:50,350 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:50,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:50,350 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:50,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:50,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:50,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280454731] [2022-01-31 19:31:50,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [280454731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:50,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:50,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:31:50,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190470189] [2022-01-31 19:31:50,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:50,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:31:50,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:31:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:31:50,426 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:50,565 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-01-31 19:31:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:31:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 19:31:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:50,566 INFO L225 Difference]: With dead ends: 80 [2022-01-31 19:31:50,566 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 19:31:50,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:31:50,567 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:50,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 33 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 19:31:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2022-01-31 19:31:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-01-31 19:31:50,573 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2022-01-31 19:31:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:50,573 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-01-31 19:31:50,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-01-31 19:31:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 19:31:50,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:50,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:50,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:31:50,575 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash -871827091, now seen corresponding path program 8 times [2022-01-31 19:31:50,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:50,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553063468] [2022-01-31 19:31:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:50,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:50,576 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:50,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:50,578 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:50,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:50,649 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:50,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553063468] [2022-01-31 19:31:50,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [553063468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:50,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:50,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:31:50,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784643319] [2022-01-31 19:31:50,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:31:50,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:50,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:31:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:31:50,650 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:50,786 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-01-31 19:31:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:31:50,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 19:31:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:50,788 INFO L225 Difference]: With dead ends: 46 [2022-01-31 19:31:50,788 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 19:31:50,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:31:50,789 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:50,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 41 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 19:31:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 19:31:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-31 19:31:50,805 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2022-01-31 19:31:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:50,810 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-31 19:31:50,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-31 19:31:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 19:31:50,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:50,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:50,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:31:50,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash 706126539, now seen corresponding path program 9 times [2022-01-31 19:31:50,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:50,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476372109] [2022-01-31 19:31:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:50,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:50,812 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:50,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:50,813 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:52,118 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:52,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476372109] [2022-01-31 19:31:52,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1476372109] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:52,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:52,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:31:52,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585985250] [2022-01-31 19:31:52,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:52,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:31:52,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:52,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:31:52,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:31:52,120 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 30 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) [2022-01-31 19:31:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:53,158 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-01-31 19:31:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:31:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 19:31:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:53,159 INFO L225 Difference]: With dead ends: 70 [2022-01-31 19:31:53,159 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 19:31:53,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:31:53,160 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:53,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:31:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 19:31:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-01-31 19:31:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-01-31 19:31:53,170 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 40 [2022-01-31 19:31:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:53,170 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-01-31 19:31:53,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 30 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) [2022-01-31 19:31:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-01-31 19:31:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 19:31:53,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:53,171 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:53,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:31:53,171 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash 996109481, now seen corresponding path program 10 times [2022-01-31 19:31:53,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:53,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539585211] [2022-01-31 19:31:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:53,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:53,173 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:53,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:53,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:53,256 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:53,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539585211] [2022-01-31 19:31:53,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539585211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:53,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:53,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:31:53,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182948784] [2022-01-31 19:31:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:53,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:31:53,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:31:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:31:53,269 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2022-01-31 19:31:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:53,433 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-01-31 19:31:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:31:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 42 [2022-01-31 19:31:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:53,434 INFO L225 Difference]: With dead ends: 102 [2022-01-31 19:31:53,434 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 19:31:53,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:31:53,434 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:53,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 33 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 19:31:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-01-31 19:31:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-01-31 19:31:53,444 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 42 [2022-01-31 19:31:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:53,444 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-01-31 19:31:53,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2022-01-31 19:31:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-01-31 19:31:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 19:31:53,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:53,444 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:53,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:31:53,444 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 909352233, now seen corresponding path program 11 times [2022-01-31 19:31:53,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:53,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455523210] [2022-01-31 19:31:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:53,446 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:53,446 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:53,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:53,447 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:53,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:53,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455523210] [2022-01-31 19:31:53,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [455523210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:53,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:31:53,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894160273] [2022-01-31 19:31:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:53,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:31:53,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:53,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:31:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:31:53,541 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2022-01-31 19:31:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:53,711 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-01-31 19:31:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:31:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 42 [2022-01-31 19:31:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:53,712 INFO L225 Difference]: With dead ends: 62 [2022-01-31 19:31:53,712 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 19:31:53,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:31:53,713 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:53,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 45 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 19:31:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-31 19:31:53,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-01-31 19:31:53,720 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2022-01-31 19:31:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:53,720 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-01-31 19:31:53,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2022-01-31 19:31:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-01-31 19:31:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 19:31:53,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:53,721 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:53,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:31:53,721 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:53,721 INFO L85 PathProgramCache]: Analyzing trace with hash 848724645, now seen corresponding path program 12 times [2022-01-31 19:31:53,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:53,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781632038] [2022-01-31 19:31:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:53,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:53,723 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:53,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:53,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:55,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:55,058 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:55,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781632038] [2022-01-31 19:31:55,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1781632038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:55,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:55,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:31:55,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480833903] [2022-01-31 19:31:55,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:55,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:31:55,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:55,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:31:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:31:55,060 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 35 states, 35 states have (on average 1.2) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:56,038 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-01-31 19:31:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:31:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 19:31:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:56,039 INFO L225 Difference]: With dead ends: 68 [2022-01-31 19:31:56,039 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 19:31:56,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=240, Invalid=2310, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:31:56,040 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:56,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 125 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:31:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 19:31:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2022-01-31 19:31:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-01-31 19:31:56,052 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 46 [2022-01-31 19:31:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:56,053 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-01-31 19:31:56,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:56,053 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-01-31 19:31:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 19:31:56,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:56,055 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:56,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:31:56,055 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:56,055 INFO L85 PathProgramCache]: Analyzing trace with hash 593935875, now seen corresponding path program 13 times [2022-01-31 19:31:56,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:56,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569859717] [2022-01-31 19:31:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:56,056 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:56,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:56,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:56,057 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:56,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:56,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569859717] [2022-01-31 19:31:56,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569859717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:56,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:56,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:31:56,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473145768] [2022-01-31 19:31:56,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:56,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:31:56,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:56,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:31:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:31:56,204 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2022-01-31 19:31:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:56,375 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-01-31 19:31:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:31:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 48 [2022-01-31 19:31:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:56,376 INFO L225 Difference]: With dead ends: 104 [2022-01-31 19:31:56,376 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:31:56,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:31:56,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:56,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 39 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:31:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-01-31 19:31:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-01-31 19:31:56,391 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2022-01-31 19:31:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:56,391 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-01-31 19:31:56,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2022-01-31 19:31:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-01-31 19:31:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 19:31:56,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:56,392 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:56,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:31:56,392 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:56,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1204234913, now seen corresponding path program 14 times [2022-01-31 19:31:56,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:56,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220700026] [2022-01-31 19:31:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:56,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:56,394 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:56,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:56,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:56,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:56,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:56,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220700026] [2022-01-31 19:31:56,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [220700026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:56,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:56,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:31:56,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061436451] [2022-01-31 19:31:56,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:56,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:31:56,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:31:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:31:56,516 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2022-01-31 19:31:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:56,726 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-01-31 19:31:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:31:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 50 [2022-01-31 19:31:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:56,726 INFO L225 Difference]: With dead ends: 58 [2022-01-31 19:31:56,726 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 19:31:56,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:31:56,727 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:56,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 49 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:31:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 19:31:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-01-31 19:31:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-01-31 19:31:56,738 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2022-01-31 19:31:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:56,738 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-01-31 19:31:56,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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) [2022-01-31 19:31:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-01-31 19:31:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 19:31:56,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:56,738 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:56,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:31:56,738 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:56,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1358080257, now seen corresponding path program 15 times [2022-01-31 19:31:56,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:56,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491129900] [2022-01-31 19:31:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:56,740 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:56,740 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:56,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:56,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:58,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:58,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491129900] [2022-01-31 19:31:58,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491129900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:58,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:58,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:31:58,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787617931] [2022-01-31 19:31:58,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:58,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:31:58,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:31:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:31:58,557 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 40 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) [2022-01-31 19:31:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:31:59,803 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-01-31 19:31:59,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:31:59,803 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 40 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 [2022-01-31 19:31:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:31:59,803 INFO L225 Difference]: With dead ends: 75 [2022-01-31 19:31:59,804 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 19:31:59,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=300, Invalid=3006, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:31:59,805 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:31:59,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 149 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:31:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 19:31:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2022-01-31 19:31:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:31:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-01-31 19:31:59,819 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 52 [2022-01-31 19:31:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:31:59,819 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-01-31 19:31:59,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 40 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) [2022-01-31 19:31:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-01-31 19:31:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:31:59,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:31:59,820 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:31:59,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:31:59,820 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:31:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:31:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1568269277, now seen corresponding path program 16 times [2022-01-31 19:31:59,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:31:59,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857210252] [2022-01-31 19:31:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:31:59,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:31:59,822 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:31:59,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:31:59,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:31:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:59,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:31:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:31:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:31:59,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:31:59,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857210252] [2022-01-31 19:31:59,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857210252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:31:59,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:31:59,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:31:59,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61380821] [2022-01-31 19:31:59,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:31:59,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:31:59,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:31:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:31:59,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:31:59,969 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2022-01-31 19:32:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:00,176 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-01-31 19:32:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:32:00,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 54 [2022-01-31 19:32:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:00,177 INFO L225 Difference]: With dead ends: 116 [2022-01-31 19:32:00,177 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 19:32:00,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:32:00,178 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:00,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 47 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:00,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 19:32:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-01-31 19:32:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-01-31 19:32:00,209 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2022-01-31 19:32:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:00,209 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-01-31 19:32:00,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2022-01-31 19:32:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-01-31 19:32:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:32:00,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:00,210 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:00,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:32:00,210 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:00,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897275, now seen corresponding path program 17 times [2022-01-31 19:32:00,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:00,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116012018] [2022-01-31 19:32:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:00,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:00,213 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:00,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:00,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:00,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:00,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:00,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116012018] [2022-01-31 19:32:00,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116012018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:00,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:00,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:32:00,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410520619] [2022-01-31 19:32:00,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:00,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:32:00,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:32:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:32:00,344 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2022-01-31 19:32:00,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:00,589 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-01-31 19:32:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:32:00,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 56 [2022-01-31 19:32:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:00,590 INFO L225 Difference]: With dead ends: 64 [2022-01-31 19:32:00,590 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 19:32:00,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:32:00,591 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:00,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 49 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 19:32:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-01-31 19:32:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-01-31 19:32:00,606 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2022-01-31 19:32:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:00,606 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-01-31 19:32:00,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2022-01-31 19:32:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-01-31 19:32:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 19:32:00,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:00,607 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:00,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:32:00,607 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1666596903, now seen corresponding path program 18 times [2022-01-31 19:32:00,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:00,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822934877] [2022-01-31 19:32:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:00,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:00,610 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:00,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:00,612 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:02,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:02,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:02,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822934877] [2022-01-31 19:32:02,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [822934877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:02,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:02,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 19:32:02,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311391063] [2022-01-31 19:32:02,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:02,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 19:32:02,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 19:32:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1941, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:32:02,908 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 45 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) [2022-01-31 19:32:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:04,824 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-01-31 19:32:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:32:04,824 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 45 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 [2022-01-31 19:32:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:04,825 INFO L225 Difference]: With dead ends: 83 [2022-01-31 19:32:04,825 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 19:32:04,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=420, Invalid=4410, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:32:04,826 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:04,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 164 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:32:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 19:32:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-01-31 19:32:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-01-31 19:32:04,845 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2022-01-31 19:32:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:04,845 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-01-31 19:32:04,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.148936170212766) internal successors, (54), 45 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) [2022-01-31 19:32:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-01-31 19:32:04,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 19:32:04,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:04,846 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:04,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:32:04,846 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:04,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1436515895, now seen corresponding path program 19 times [2022-01-31 19:32:04,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:04,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113433057] [2022-01-31 19:32:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:04,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:04,848 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:04,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:04,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:04,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:04,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:04,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113433057] [2022-01-31 19:32:04,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113433057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:04,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:04,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:32:04,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521696406] [2022-01-31 19:32:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:04,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:32:04,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:32:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:32:04,983 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2022-01-31 19:32:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:05,247 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-01-31 19:32:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:32:05,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 60 [2022-01-31 19:32:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:05,248 INFO L225 Difference]: With dead ends: 128 [2022-01-31 19:32:05,248 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 19:32:05,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:32:05,249 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 123 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:05,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 29 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 19:32:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2022-01-31 19:32:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-01-31 19:32:05,275 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2022-01-31 19:32:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:05,275 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-01-31 19:32:05,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2022-01-31 19:32:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-01-31 19:32:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:32:05,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:05,276 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:05,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:32:05,276 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:05,277 INFO L85 PathProgramCache]: Analyzing trace with hash -535810603, now seen corresponding path program 20 times [2022-01-31 19:32:05,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:05,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753803999] [2022-01-31 19:32:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:05,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:05,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:05,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:05,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:05,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:05,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:05,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753803999] [2022-01-31 19:32:05,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753803999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:05,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:05,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:32:05,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346796974] [2022-01-31 19:32:05,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:05,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:32:05,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:05,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:32:05,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:32:05,450 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2022-01-31 19:32:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:05,802 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-01-31 19:32:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:32:05,804 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 62 [2022-01-31 19:32:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:05,805 INFO L225 Difference]: With dead ends: 70 [2022-01-31 19:32:05,805 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 19:32:05,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:32:05,806 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 77 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:05,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 55 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:05,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 19:32:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-01-31 19:32:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-01-31 19:32:05,836 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2022-01-31 19:32:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:05,836 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-01-31 19:32:05,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2022-01-31 19:32:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-01-31 19:32:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 19:32:05,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:05,837 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:05,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:32:05,837 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:05,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1495424307, now seen corresponding path program 21 times [2022-01-31 19:32:05,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:05,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718949840] [2022-01-31 19:32:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:05,839 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:05,839 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:05,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:05,840 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:08,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:08,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718949840] [2022-01-31 19:32:08,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [718949840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:08,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:08,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:32:08,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3513496] [2022-01-31 19:32:08,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:08,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:32:08,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:32:08,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:32:08,857 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 52 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) [2022-01-31 19:32:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:12,387 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2022-01-31 19:32:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:32:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 52 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 [2022-01-31 19:32:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:12,388 INFO L225 Difference]: With dead ends: 91 [2022-01-31 19:32:12,388 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 19:32:12,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=757, Invalid=7985, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:32:12,390 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:12,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 181 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:32:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 19:32:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2022-01-31 19:32:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-01-31 19:32:12,420 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 64 [2022-01-31 19:32:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:12,420 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-01-31 19:32:12,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 52 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) [2022-01-31 19:32:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-01-31 19:32:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 19:32:12,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:12,420 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:12,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:32:12,421 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:12,421 INFO L85 PathProgramCache]: Analyzing trace with hash -697946863, now seen corresponding path program 22 times [2022-01-31 19:32:12,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434530414] [2022-01-31 19:32:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:12,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:12,422 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:12,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:12,423 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:12,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:12,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:12,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434530414] [2022-01-31 19:32:12,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434530414] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:12,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:12,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:32:12,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41877830] [2022-01-31 19:32:12,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:12,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:32:12,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:12,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:32:12,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:32:12,590 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2022-01-31 19:32:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:12,874 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2022-01-31 19:32:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:32:12,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 66 [2022-01-31 19:32:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:12,875 INFO L225 Difference]: With dead ends: 140 [2022-01-31 19:32:12,875 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 19:32:12,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:32:12,876 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:12,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 41 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 19:32:12,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-01-31 19:32:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-01-31 19:32:12,899 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2022-01-31 19:32:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:12,899 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-01-31 19:32:12,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2022-01-31 19:32:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-01-31 19:32:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 19:32:12,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:12,900 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:12,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:32:12,900 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:12,900 INFO L85 PathProgramCache]: Analyzing trace with hash 564809263, now seen corresponding path program 23 times [2022-01-31 19:32:12,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:12,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317544221] [2022-01-31 19:32:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:12,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:12,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:12,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:12,902 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:13,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:13,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:13,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317544221] [2022-01-31 19:32:13,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [317544221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:13,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:13,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:32:13,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045934219] [2022-01-31 19:32:13,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:13,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:32:13,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:13,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:32:13,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:32:13,087 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2022-01-31 19:32:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:13,439 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-01-31 19:32:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:32:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 68 [2022-01-31 19:32:13,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:13,440 INFO L225 Difference]: With dead ends: 76 [2022-01-31 19:32:13,440 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 19:32:13,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1230, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:32:13,441 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:13,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 51 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 19:32:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-31 19:32:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-01-31 19:32:13,468 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2022-01-31 19:32:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:13,468 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-01-31 19:32:13,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2022-01-31 19:32:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-01-31 19:32:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 19:32:13,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:13,469 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:13,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:32:13,469 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:13,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1665806579, now seen corresponding path program 24 times [2022-01-31 19:32:13,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:13,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448507063] [2022-01-31 19:32:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:13,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:13,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:13,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:13,471 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:16,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:16,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:16,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448507063] [2022-01-31 19:32:16,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448507063] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:16,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:16,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 19:32:16,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294837038] [2022-01-31 19:32:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:16,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 19:32:16,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 19:32:16,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:32:16,827 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:19,505 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-01-31 19:32:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 19:32:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 19:32:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:19,506 INFO L225 Difference]: With dead ends: 98 [2022-01-31 19:32:19,506 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 19:32:19,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=649, Invalid=7007, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:32:19,508 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:19,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 153 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:32:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 19:32:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2022-01-31 19:32:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-01-31 19:32:19,538 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 70 [2022-01-31 19:32:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:19,538 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-01-31 19:32:19,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.11864406779661) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:19,538 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-01-31 19:32:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 19:32:19,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:19,539 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:19,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:32:19,539 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:19,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2098950037, now seen corresponding path program 25 times [2022-01-31 19:32:19,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:19,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596119952] [2022-01-31 19:32:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:19,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:19,540 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:19,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:19,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:19,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:19,727 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:19,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596119952] [2022-01-31 19:32:19,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596119952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:19,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:19,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:32:19,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107947702] [2022-01-31 19:32:19,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:19,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:32:19,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:32:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:32:19,729 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-01-31 19:32:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:20,045 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2022-01-31 19:32:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:32:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 72 [2022-01-31 19:32:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:20,046 INFO L225 Difference]: With dead ends: 152 [2022-01-31 19:32:20,046 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 19:32:20,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:32:20,047 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:20,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 39 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 19:32:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2022-01-31 19:32:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-01-31 19:32:20,076 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2022-01-31 19:32:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:20,077 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-01-31 19:32:20,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-01-31 19:32:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-01-31 19:32:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 19:32:20,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:20,077 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:20,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:32:20,077 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1375273737, now seen corresponding path program 26 times [2022-01-31 19:32:20,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:20,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835827646] [2022-01-31 19:32:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:20,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:20,079 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:20,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:20,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:20,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:20,234 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835827646] [2022-01-31 19:32:20,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [835827646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:20,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:20,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:32:20,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392940638] [2022-01-31 19:32:20,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:20,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:32:20,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:32:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:32:20,235 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-01-31 19:32:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:20,517 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-01-31 19:32:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:32:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 74 [2022-01-31 19:32:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:20,518 INFO L225 Difference]: With dead ends: 82 [2022-01-31 19:32:20,518 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:32:20,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:32:20,519 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:20,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 45 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:32:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:32:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-01-31 19:32:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-01-31 19:32:20,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2022-01-31 19:32:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:20,548 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-01-31 19:32:20,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2022-01-31 19:32:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-01-31 19:32:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 19:32:20,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:20,549 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:20,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:32:20,549 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash -198527641, now seen corresponding path program 27 times [2022-01-31 19:32:20,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:20,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614564478] [2022-01-31 19:32:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:20,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:20,551 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:20,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:20,552 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:24,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:24,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:24,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614564478] [2022-01-31 19:32:24,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [614564478] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:24,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:24,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 19:32:24,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230634064] [2022-01-31 19:32:24,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:24,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 19:32:24,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 19:32:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:32:24,593 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:27,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:27,853 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-01-31 19:32:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 19:32:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 19:32:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:27,856 INFO L225 Difference]: With dead ends: 107 [2022-01-31 19:32:27,856 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 19:32:27,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=777, Invalid=8535, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:32:27,862 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:27,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 154 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:32:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 19:32:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2022-01-31 19:32:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-01-31 19:32:27,910 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2022-01-31 19:32:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:27,910 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-01-31 19:32:27,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-01-31 19:32:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:32:27,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:27,911 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:27,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:32:27,911 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:27,911 INFO L85 PathProgramCache]: Analyzing trace with hash -793163707, now seen corresponding path program 28 times [2022-01-31 19:32:27,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:27,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304236462] [2022-01-31 19:32:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:27,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:27,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:27,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:27,920 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:28,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:28,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304236462] [2022-01-31 19:32:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [304236462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:28,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:28,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:32:28,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346594928] [2022-01-31 19:32:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:28,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:32:28,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:32:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:32:28,203 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-01-31 19:32:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:28,752 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2022-01-31 19:32:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:32:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 78 [2022-01-31 19:32:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:28,753 INFO L225 Difference]: With dead ends: 164 [2022-01-31 19:32:28,753 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 19:32:28,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:32:28,753 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:28,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 57 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:32:28,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 19:32:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-01-31 19:32:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-01-31 19:32:28,797 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2022-01-31 19:32:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:28,797 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-01-31 19:32:28,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-01-31 19:32:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-01-31 19:32:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:32:28,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:28,798 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:28,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:32:28,798 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1888293789, now seen corresponding path program 29 times [2022-01-31 19:32:28,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:28,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397001310] [2022-01-31 19:32:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:28,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:28,800 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:28,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:28,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:29,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:29,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397001310] [2022-01-31 19:32:29,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1397001310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:29,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:29,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:32:29,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119914074] [2022-01-31 19:32:29,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:29,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:32:29,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:32:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:32:29,040 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-01-31 19:32:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:29,525 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-01-31 19:32:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:32:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 80 [2022-01-31 19:32:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:29,526 INFO L225 Difference]: With dead ends: 88 [2022-01-31 19:32:29,526 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 19:32:29,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:32:29,526 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 141 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:29,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 45 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 19:32:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-31 19:32:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-01-31 19:32:29,564 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2022-01-31 19:32:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:29,564 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-01-31 19:32:29,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-01-31 19:32:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-01-31 19:32:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:32:29,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:29,564 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:29,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:32:29,564 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1160794047, now seen corresponding path program 30 times [2022-01-31 19:32:29,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623003435] [2022-01-31 19:32:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:29,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:29,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:29,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:29,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:34,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623003435] [2022-01-31 19:32:34,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623003435] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:34,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:34,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 19:32:34,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861157692] [2022-01-31 19:32:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:34,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 19:32:34,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 19:32:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=4258, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:32:34,190 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:38,125 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2022-01-31 19:32:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 19:32:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 19:32:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:38,127 INFO L225 Difference]: With dead ends: 115 [2022-01-31 19:32:38,127 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 19:32:38,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=771, Invalid=9531, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:32:38,128 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:38,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 241 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2418 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:32:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 19:32:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2022-01-31 19:32:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-01-31 19:32:38,181 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 82 [2022-01-31 19:32:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:38,181 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-01-31 19:32:38,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-01-31 19:32:38,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:32:38,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:38,181 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:38,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:32:38,181 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2113211233, now seen corresponding path program 31 times [2022-01-31 19:32:38,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:38,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403054133] [2022-01-31 19:32:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:38,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:38,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:38,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:38,184 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:38,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:38,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403054133] [2022-01-31 19:32:38,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [403054133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:38,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:38,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:32:38,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082508142] [2022-01-31 19:32:38,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:38,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:32:38,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:32:38,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:32:38,381 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 28 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) [2022-01-31 19:32:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:38,776 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2022-01-31 19:32:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:32:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 28 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 84 [2022-01-31 19:32:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:38,777 INFO L225 Difference]: With dead ends: 176 [2022-01-31 19:32:38,777 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 19:32:38,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:32:38,777 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 189 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:38,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 41 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 19:32:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2022-01-31 19:32:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-01-31 19:32:38,820 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2022-01-31 19:32:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:38,820 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-01-31 19:32:38,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 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) [2022-01-31 19:32:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-01-31 19:32:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 19:32:38,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:38,820 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:38,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:32:38,821 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:38,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1021924803, now seen corresponding path program 32 times [2022-01-31 19:32:38,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:38,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933371490] [2022-01-31 19:32:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:38,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:38,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:38,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:38,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:39,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933371490] [2022-01-31 19:32:39,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [933371490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:39,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:39,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:32:39,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962298534] [2022-01-31 19:32:39,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:39,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:32:39,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:32:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:32:39,070 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 28 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) [2022-01-31 19:32:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:39,554 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-01-31 19:32:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:32:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 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 86 [2022-01-31 19:32:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:39,555 INFO L225 Difference]: With dead ends: 94 [2022-01-31 19:32:39,555 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 19:32:39,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=2091, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:32:39,556 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 140 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:39,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 41 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:32:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 19:32:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-01-31 19:32:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-01-31 19:32:39,599 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2022-01-31 19:32:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:39,599 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-01-31 19:32:39,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 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) [2022-01-31 19:32:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-01-31 19:32:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 19:32:39,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:39,600 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:39,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:32:39,600 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1803853925, now seen corresponding path program 33 times [2022-01-31 19:32:39,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:39,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658858248] [2022-01-31 19:32:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:39,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:39,601 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:39,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:39,602 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:45,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:45,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658858248] [2022-01-31 19:32:45,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1658858248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:45,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:45,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 19:32:45,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975032493] [2022-01-31 19:32:45,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:45,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 19:32:45,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 19:32:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=5351, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:32:45,984 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 77 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:51,065 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2022-01-31 19:32:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 19:32:51,065 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-01-31 19:32:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:51,066 INFO L225 Difference]: With dead ends: 123 [2022-01-31 19:32:51,066 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 19:32:51,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2529 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=823, Invalid=11387, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 19:32:51,067 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2202 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:51,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 197 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2202 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:32:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 19:32:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2022-01-31 19:32:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-01-31 19:32:51,120 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 88 [2022-01-31 19:32:51,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:51,120 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-01-31 19:32:51,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:51,120 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-01-31 19:32:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 19:32:51,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:51,120 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:51,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:32:51,121 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1618463367, now seen corresponding path program 34 times [2022-01-31 19:32:51,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:51,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401476301] [2022-01-31 19:32:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:51,122 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:51,122 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:51,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:51,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:51,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:51,377 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401476301] [2022-01-31 19:32:51,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1401476301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:51,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:51,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:32:51,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545182478] [2022-01-31 19:32:51,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:51,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:32:51,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:32:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:32:51,379 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:51,900 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2022-01-31 19:32:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:32:51,900 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 19:32:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:51,901 INFO L225 Difference]: With dead ends: 188 [2022-01-31 19:32:51,901 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 19:32:51,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:32:51,901 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:51,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 35 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:32:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 19:32:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2022-01-31 19:32:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-01-31 19:32:51,953 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2022-01-31 19:32:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:51,953 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-01-31 19:32:51,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-01-31 19:32:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 19:32:51,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:51,954 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:51,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:32:51,954 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 443210903, now seen corresponding path program 35 times [2022-01-31 19:32:51,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:51,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975987433] [2022-01-31 19:32:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:51,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:51,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:51,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:51,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:52,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:32:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:32:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:32:52,239 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:32:52,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975987433] [2022-01-31 19:32:52,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975987433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:32:52,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:32:52,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:32:52,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860076436] [2022-01-31 19:32:52,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:32:52,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:32:52,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:32:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:32:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:32:52,240 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:32:52,873 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-01-31 19:32:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:32:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-01-31 19:32:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:32:52,874 INFO L225 Difference]: With dead ends: 100 [2022-01-31 19:32:52,874 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 19:32:52,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=652, Invalid=2428, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:32:52,875 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 134 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:32:52,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 81 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:32:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 19:32:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-01-31 19:32:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-01-31 19:32:52,927 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2022-01-31 19:32:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:32:52,927 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-01-31 19:32:52,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:32:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-01-31 19:32:52,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 19:32:52,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:32:52,928 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:32:52,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:32:52,928 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:32:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:32:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1737253749, now seen corresponding path program 36 times [2022-01-31 19:32:52,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:32:52,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838474862] [2022-01-31 19:32:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:32:52,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:32:52,931 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:32:52,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:32:52,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:32:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:00,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:00,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:00,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838474862] [2022-01-31 19:33:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1838474862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:00,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:00,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 19:33:00,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169534995] [2022-01-31 19:33:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:00,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 19:33:00,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 19:33:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=5998, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:33:00,588 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 83 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:06,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:06,364 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-01-31 19:33:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 19:33:06,364 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 19:33:06,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:06,365 INFO L225 Difference]: With dead ends: 134 [2022-01-31 19:33:06,366 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 19:33:06,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3528 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1472, Invalid=13780, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 19:33:06,367 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:06,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 126 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:33:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 19:33:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2022-01-31 19:33:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-01-31 19:33:06,437 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 94 [2022-01-31 19:33:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:06,437 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-01-31 19:33:06,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-01-31 19:33:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 19:33:06,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:06,437 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:06,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:33:06,438 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:06,438 INFO L85 PathProgramCache]: Analyzing trace with hash -228087085, now seen corresponding path program 37 times [2022-01-31 19:33:06,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:06,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778828519] [2022-01-31 19:33:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:06,439 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:06,439 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:06,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:06,440 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:06,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:06,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:06,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778828519] [2022-01-31 19:33:06,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1778828519] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:06,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:06,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:33:06,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821522127] [2022-01-31 19:33:06,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:06,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:33:06,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:06,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:33:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:33:06,754 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:07,118 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2022-01-31 19:33:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:33:07,119 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 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 96 [2022-01-31 19:33:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:07,119 INFO L225 Difference]: With dead ends: 200 [2022-01-31 19:33:07,119 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 19:33:07,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:33:07,120 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 244 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:07,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 39 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 19:33:07,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2022-01-31 19:33:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-01-31 19:33:07,181 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2022-01-31 19:33:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:07,181 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-01-31 19:33:07,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-01-31 19:33:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:33:07,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:07,182 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:07,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:33:07,182 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash 25043825, now seen corresponding path program 38 times [2022-01-31 19:33:07,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:07,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193793330] [2022-01-31 19:33:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:07,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:07,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:07,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:07,184 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:07,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:07,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193793330] [2022-01-31 19:33:07,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [193793330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:07,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:07,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:33:07,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338436046] [2022-01-31 19:33:07,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:07,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:33:07,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:33:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:33:07,384 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:07,821 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-01-31 19:33:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:33:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-01-31 19:33:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:07,838 INFO L225 Difference]: With dead ends: 106 [2022-01-31 19:33:07,838 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:33:07,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=750, Invalid=2790, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:33:07,839 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 162 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:07,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 61 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:33:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-31 19:33:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-01-31 19:33:07,911 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2022-01-31 19:33:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:07,911 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-01-31 19:33:07,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-01-31 19:33:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:33:07,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:07,918 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:07,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:33:07,919 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:07,919 INFO L85 PathProgramCache]: Analyzing trace with hash -689349681, now seen corresponding path program 39 times [2022-01-31 19:33:07,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:07,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582760425] [2022-01-31 19:33:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:07,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:07,920 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:07,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:07,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:13,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:13,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:13,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582760425] [2022-01-31 19:33:13,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582760425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:13,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:13,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 19:33:13,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856737170] [2022-01-31 19:33:13,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:13,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 19:33:13,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 19:33:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=5594, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:33:13,050 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 79 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 77 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:17,764 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2022-01-31 19:33:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 19:33:17,764 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 77 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 19:33:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:17,765 INFO L225 Difference]: With dead ends: 140 [2022-01-31 19:33:17,765 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 19:33:17,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=756, Invalid=11234, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 19:33:17,766 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 3578 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:17,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 270 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3578 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:33:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 19:33:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2022-01-31 19:33:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-01-31 19:33:17,855 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 100 [2022-01-31 19:33:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:17,855 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-01-31 19:33:17,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 77 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-01-31 19:33:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:33:17,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:17,856 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:17,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:33:17,856 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash -26741587, now seen corresponding path program 40 times [2022-01-31 19:33:17,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:17,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755871918] [2022-01-31 19:33:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:17,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:17,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:17,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:17,862 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:18,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:18,115 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:18,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755871918] [2022-01-31 19:33:18,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755871918] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:18,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:18,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:33:18,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968138118] [2022-01-31 19:33:18,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:18,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:33:18,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:33:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=845, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:33:18,116 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:18,539 INFO L93 Difference]: Finished difference Result 212 states and 218 transitions. [2022-01-31 19:33:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:33:18,539 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-31 19:33:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:18,540 INFO L225 Difference]: With dead ends: 212 [2022-01-31 19:33:18,540 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 19:33:18,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=533, Invalid=1819, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:33:18,540 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 198 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:18,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 43 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 19:33:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-01-31 19:33:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:18,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-01-31 19:33:18,674 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2022-01-31 19:33:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:18,674 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-01-31 19:33:18,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-01-31 19:33:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:33:18,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:18,674 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:18,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:33:18,675 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:18,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1662574901, now seen corresponding path program 41 times [2022-01-31 19:33:18,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:18,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659114721] [2022-01-31 19:33:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:18,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:18,677 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:18,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:18,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:18,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:18,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:18,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659114721] [2022-01-31 19:33:18,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [659114721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:18,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:18,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:33:18,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353735292] [2022-01-31 19:33:18,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:18,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:33:18,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:18,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:33:18,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:33:18,937 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:19,413 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2022-01-31 19:33:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:33:19,431 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-01-31 19:33:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:19,432 INFO L225 Difference]: With dead ends: 112 [2022-01-31 19:33:19,432 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 19:33:19,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=855, Invalid=3177, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:33:19,439 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 176 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:19,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 53 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:33:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 19:33:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-01-31 19:33:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2022-01-31 19:33:19,527 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2022-01-31 19:33:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:19,527 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2022-01-31 19:33:19,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:19,527 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2022-01-31 19:33:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 19:33:19,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:19,528 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:19,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:33:19,528 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1006692521, now seen corresponding path program 42 times [2022-01-31 19:33:19,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:19,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776491693] [2022-01-31 19:33:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:19,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:19,529 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:19,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:19,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:25,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:25,755 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:25,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776491693] [2022-01-31 19:33:25,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776491693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:25,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:25,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:33:25,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693835017] [2022-01-31 19:33:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:25,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:33:25,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:25,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:33:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=6335, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:33:25,757 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 82 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:31,041 INFO L93 Difference]: Finished difference Result 148 states and 151 transitions. [2022-01-31 19:33:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 19:33:31,041 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 82 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-01-31 19:33:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:31,047 INFO L225 Difference]: With dead ends: 148 [2022-01-31 19:33:31,047 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:33:31,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=837, Invalid=12735, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 19:33:31,049 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 4263 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 4390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:31,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 322 Invalid, 4390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4263 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 19:33:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:33:31,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2022-01-31 19:33:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-01-31 19:33:31,155 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 106 [2022-01-31 19:33:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:31,155 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-01-31 19:33:31,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 82 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-01-31 19:33:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 19:33:31,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:31,155 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:31,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:33:31,156 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2077209351, now seen corresponding path program 43 times [2022-01-31 19:33:31,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:31,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049164022] [2022-01-31 19:33:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:31,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:31,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:31,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:31,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:31,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:31,510 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:31,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049164022] [2022-01-31 19:33:31,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049164022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:31,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:31,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:33:31,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749699958] [2022-01-31 19:33:31,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:31,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:33:31,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:31,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:33:31,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:33:31,511 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:32,074 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2022-01-31 19:33:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:33:32,074 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-01-31 19:33:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:32,075 INFO L225 Difference]: With dead ends: 224 [2022-01-31 19:33:32,075 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:33:32,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:33:32,076 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 226 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:32,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 55 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:33:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2022-01-31 19:33:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.028301886792453) internal successors, (109), 106 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-01-31 19:33:32,175 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2022-01-31 19:33:32,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:32,175 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-01-31 19:33:32,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-01-31 19:33:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:33:32,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:32,176 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:32,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:33:32,176 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1010536795, now seen corresponding path program 44 times [2022-01-31 19:33:32,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:32,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788352556] [2022-01-31 19:33:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:32,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:32,177 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:32,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:32,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:32,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:32,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:32,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788352556] [2022-01-31 19:33:32,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [788352556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:32,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:32,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:33:32,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742889666] [2022-01-31 19:33:32,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:32,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:33:32,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:33:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:33:32,543 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:33,279 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2022-01-31 19:33:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:33:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 19:33:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:33,280 INFO L225 Difference]: With dead ends: 118 [2022-01-31 19:33:33,280 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 19:33:33,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=967, Invalid=3589, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:33:33,287 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 202 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:33,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 43 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 19:33:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-01-31 19:33:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-01-31 19:33:33,392 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2022-01-31 19:33:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:33,393 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-01-31 19:33:33,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-01-31 19:33:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 19:33:33,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:33,393 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:33,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:33:33,393 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:33,394 INFO L85 PathProgramCache]: Analyzing trace with hash 550087171, now seen corresponding path program 45 times [2022-01-31 19:33:33,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:33,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427638100] [2022-01-31 19:33:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:33,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:33,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:33,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:33,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:40,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:40,491 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:40,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427638100] [2022-01-31 19:33:40,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [427638100] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:40,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:40,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 19:33:40,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394354007] [2022-01-31 19:33:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:40,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 19:33:40,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:40,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 19:33:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=7294, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:33:40,493 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 90 states, 90 states have (on average 1.2) internal successors, (108), 88 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:46,226 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2022-01-31 19:33:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 19:33:46,226 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.2) internal successors, (108), 88 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-01-31 19:33:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:46,227 INFO L225 Difference]: With dead ends: 158 [2022-01-31 19:33:46,227 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 19:33:46,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=929, Invalid=14571, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 19:33:46,228 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 3773 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 3773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:46,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 213 Invalid, 3951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 3773 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:33:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 19:33:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 118. [2022-01-31 19:33:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-01-31 19:33:46,333 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 112 [2022-01-31 19:33:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:46,334 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-01-31 19:33:46,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.2) internal successors, (108), 88 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-01-31 19:33:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:33:46,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:46,334 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:46,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:33:46,334 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1366132193, now seen corresponding path program 46 times [2022-01-31 19:33:46,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404794891] [2022-01-31 19:33:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:46,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:46,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:46,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:46,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:46,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:46,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404794891] [2022-01-31 19:33:46,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [404794891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:46,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:46,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:33:46,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353600674] [2022-01-31 19:33:46,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:46,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:33:46,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:46,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:33:46,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:33:46,754 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:47,413 INFO L93 Difference]: Finished difference Result 236 states and 242 transitions. [2022-01-31 19:33:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:33:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 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 114 [2022-01-31 19:33:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:47,414 INFO L225 Difference]: With dead ends: 236 [2022-01-31 19:33:47,414 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 19:33:47,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 19:33:47,414 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 287 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:47,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 41 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 19:33:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-01-31 19:33:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-01-31 19:33:47,515 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2022-01-31 19:33:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:47,515 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-01-31 19:33:47,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:47,516 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-01-31 19:33:47,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:33:47,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:47,516 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:47,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:33:47,516 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2042409727, now seen corresponding path program 47 times [2022-01-31 19:33:47,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:47,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527423721] [2022-01-31 19:33:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:47,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:47,518 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:47,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:47,519 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:47,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:33:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:33:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:33:47,921 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:33:47,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527423721] [2022-01-31 19:33:47,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527423721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:33:47,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:33:47,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:33:47,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894247210] [2022-01-31 19:33:47,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:33:47,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:33:47,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:33:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:33:47,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:33:47,922 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:33:48,711 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2022-01-31 19:33:48,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:33:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 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 116 [2022-01-31 19:33:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:33:48,712 INFO L225 Difference]: With dead ends: 124 [2022-01-31 19:33:48,712 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 19:33:48,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1086, Invalid=4026, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:33:48,712 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:33:48,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 81 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:33:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 19:33:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-01-31 19:33:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-01-31 19:33:48,815 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2022-01-31 19:33:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:33:48,815 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-01-31 19:33:48,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:33:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-01-31 19:33:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 19:33:48,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:33:48,816 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:33:48,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:33:48,816 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:33:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:33:48,816 INFO L85 PathProgramCache]: Analyzing trace with hash 969031645, now seen corresponding path program 48 times [2022-01-31 19:33:48,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:33:48,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412862794] [2022-01-31 19:33:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:33:48,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:33:48,817 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:33:48,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:33:48,818 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:33:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:02,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:02,585 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412862794] [2022-01-31 19:34:02,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412862794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:02,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:02,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 19:34:02,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142188507] [2022-01-31 19:34:02,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:02,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 19:34:02,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:02,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 19:34:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1321, Invalid=10235, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 19:34:02,587 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 108 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 106 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:14,086 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2022-01-31 19:34:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 19:34:14,086 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 106 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 19:34:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:14,087 INFO L225 Difference]: With dead ends: 165 [2022-01-31 19:34:14,087 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 19:34:14,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6930 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=2745, Invalid=25985, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 19:34:14,088 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3787 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 3787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:14,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 174 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 3787 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 19:34:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 19:34:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2022-01-31 19:34:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-01-31 19:34:14,226 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 118 [2022-01-31 19:34:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:14,226 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-01-31 19:34:14,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0555555555555556) internal successors, (114), 106 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-01-31 19:34:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:34:14,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:14,227 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:14,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:34:14,227 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash 244845883, now seen corresponding path program 49 times [2022-01-31 19:34:14,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:14,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678981949] [2022-01-31 19:34:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:14,228 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:14,228 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:14,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:14,230 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:14,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:14,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:14,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678981949] [2022-01-31 19:34:14,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678981949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:14,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:14,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:34:14,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064268755] [2022-01-31 19:34:14,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:14,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:34:14,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:34:14,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:34:14,698 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:15,433 INFO L93 Difference]: Finished difference Result 248 states and 254 transitions. [2022-01-31 19:34:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:34:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 19:34:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:15,434 INFO L225 Difference]: With dead ends: 248 [2022-01-31 19:34:15,434 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 19:34:15,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:34:15,435 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:15,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 45 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:34:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 19:34:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2022-01-31 19:34:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2022-01-31 19:34:15,563 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2022-01-31 19:34:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:15,563 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2022-01-31 19:34:15,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2022-01-31 19:34:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:34:15,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:15,564 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:15,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:34:15,564 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash -385971239, now seen corresponding path program 50 times [2022-01-31 19:34:15,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:15,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086478738] [2022-01-31 19:34:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:15,566 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:15,566 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:15,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:15,567 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:16,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:16,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:16,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086478738] [2022-01-31 19:34:16,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086478738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:16,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:16,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:34:16,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436804639] [2022-01-31 19:34:16,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:16,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:34:16,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:34:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:34:16,029 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:16,933 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2022-01-31 19:34:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:34:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-01-31 19:34:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:16,934 INFO L225 Difference]: With dead ends: 130 [2022-01-31 19:34:16,934 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 19:34:16,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1212, Invalid=4488, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:34:16,936 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 193 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:16,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 59 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:34:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 19:34:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-01-31 19:34:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-01-31 19:34:17,134 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2022-01-31 19:34:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:17,134 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-01-31 19:34:17,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-01-31 19:34:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:34:17,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:17,135 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:17,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:34:17,135 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash -537834953, now seen corresponding path program 51 times [2022-01-31 19:34:17,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:17,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156572179] [2022-01-31 19:34:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:17,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:17,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:17,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:17,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:30,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:30,465 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:30,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156572179] [2022-01-31 19:34:30,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [156572179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:30,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:30,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 19:34:30,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074855415] [2022-01-31 19:34:30,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:30,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 19:34:30,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 19:34:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=11013, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 19:34:30,467 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 110 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:42,982 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2022-01-31 19:34:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 19:34:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 110 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-01-31 19:34:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:42,983 INFO L225 Difference]: With dead ends: 174 [2022-01-31 19:34:42,983 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 19:34:42,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7151 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=2948, Invalid=27852, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 19:34:42,984 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3747 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 4073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 3747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:42,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 134 Invalid, 4073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 3747 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 19:34:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 19:34:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 130. [2022-01-31 19:34:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.032) internal successors, (129), 125 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-01-31 19:34:43,135 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 124 [2022-01-31 19:34:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:43,135 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-01-31 19:34:43,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 110 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-01-31 19:34:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 19:34:43,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:43,136 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:43,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:34:43,136 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash -449976043, now seen corresponding path program 52 times [2022-01-31 19:34:43,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742471912] [2022-01-31 19:34:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:43,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:43,137 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:43,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:43,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:43,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:43,559 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742471912] [2022-01-31 19:34:43,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1742471912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:43,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:43,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:34:43,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515631552] [2022-01-31 19:34:43,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:43,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:34:43,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:34:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:34:43,560 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:44,166 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2022-01-31 19:34:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:34:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 19:34:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:44,167 INFO L225 Difference]: With dead ends: 260 [2022-01-31 19:34:44,167 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 19:34:44,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=825, Invalid=2835, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:34:44,168 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 313 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:44,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 37 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:34:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 19:34:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2022-01-31 19:34:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:44,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-01-31 19:34:44,318 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2022-01-31 19:34:44,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:44,320 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-01-31 19:34:44,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-01-31 19:34:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 19:34:44,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:44,321 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:44,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:34:44,321 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:44,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash -599746253, now seen corresponding path program 53 times [2022-01-31 19:34:44,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:44,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102493235] [2022-01-31 19:34:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:44,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:44,323 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:44,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:44,324 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:44,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:34:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:34:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:34:44,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:34:44,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102493235] [2022-01-31 19:34:44,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102493235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:34:44,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:34:44,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:34:44,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363918545] [2022-01-31 19:34:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:34:44,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:34:44,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:34:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:34:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:34:44,808 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:34:45,619 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2022-01-31 19:34:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:34:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-01-31 19:34:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:34:45,620 INFO L225 Difference]: With dead ends: 136 [2022-01-31 19:34:45,620 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 19:34:45,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1345, Invalid=4975, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:34:45,621 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 203 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:34:45,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 65 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:34:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 19:34:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-31 19:34:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2022-01-31 19:34:45,775 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2022-01-31 19:34:45,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:34:45,775 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2022-01-31 19:34:45,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 41 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:34:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2022-01-31 19:34:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 19:34:45,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:34:45,776 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:34:45,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:34:45,776 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:34:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:34:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash 182806801, now seen corresponding path program 54 times [2022-01-31 19:34:45,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:34:45,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905926456] [2022-01-31 19:34:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:34:45,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:34:45,778 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:34:45,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:34:45,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:34:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:03,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:03,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:03,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905926456] [2022-01-31 19:35:03,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [905926456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:03,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:03,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 19:35:03,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970099548] [2022-01-31 19:35:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:03,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 19:35:03,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 19:35:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=12677, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 19:35:03,701 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 120 states, 120 states have (on average 1.05) internal successors, (126), 118 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:19,310 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2022-01-31 19:35:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 19:35:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.05) internal successors, (126), 118 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 19:35:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:19,311 INFO L225 Difference]: With dead ends: 181 [2022-01-31 19:35:19,311 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 19:35:19,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8215 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=3455, Invalid=32077, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 19:35:19,313 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 4603 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 4825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 4603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:19,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 202 Invalid, 4825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 4603 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 19:35:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 19:35:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2022-01-31 19:35:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 131 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-01-31 19:35:19,483 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 130 [2022-01-31 19:35:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:19,483 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-01-31 19:35:19,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.05) internal successors, (126), 118 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-01-31 19:35:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:35:19,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:19,484 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:19,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:35:19,484 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:19,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash 597014895, now seen corresponding path program 55 times [2022-01-31 19:35:19,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:19,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876143274] [2022-01-31 19:35:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:19,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:19,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:19,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:19,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:20,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:20,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:20,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876143274] [2022-01-31 19:35:20,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [876143274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:20,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:20,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:35:20,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026054777] [2022-01-31 19:35:20,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:20,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:35:20,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:35:20,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:35:20,005 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:20,856 INFO L93 Difference]: Finished difference Result 272 states and 278 transitions. [2022-01-31 19:35:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:35:20,857 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 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 132 [2022-01-31 19:35:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:20,857 INFO L225 Difference]: With dead ends: 272 [2022-01-31 19:35:20,857 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 19:35:20,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=908, Invalid=3124, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 19:35:20,862 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 328 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:20,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 45 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:35:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 19:35:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 135. [2022-01-31 19:35:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-01-31 19:35:21,048 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2022-01-31 19:35:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:21,048 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-01-31 19:35:21,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-01-31 19:35:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:35:21,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:21,049 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:21,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:35:21,049 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:21,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1195279603, now seen corresponding path program 56 times [2022-01-31 19:35:21,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:21,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359233746] [2022-01-31 19:35:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:21,052 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:21,052 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:21,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:21,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:21,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:21,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359233746] [2022-01-31 19:35:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [359233746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:21,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:21,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:35:21,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748645064] [2022-01-31 19:35:21,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:21,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:35:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:35:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:35:21,519 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:35:22,580 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-01-31 19:35:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:35:22,580 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 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 134 [2022-01-31 19:35:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:35:22,581 INFO L225 Difference]: With dead ends: 142 [2022-01-31 19:35:22,581 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 19:35:22,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1485, Invalid=5487, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:35:22,582 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 216 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:35:22,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 79 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:35:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 19:35:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-01-31 19:35:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-01-31 19:35:22,741 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2022-01-31 19:35:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:35:22,741 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-01-31 19:35:22,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 43 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:35:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-01-31 19:35:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 19:35:22,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:35:22,741 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:35:22,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:35:22,742 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:35:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:35:22,742 INFO L85 PathProgramCache]: Analyzing trace with hash -894092181, now seen corresponding path program 57 times [2022-01-31 19:35:22,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:35:22,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845392320] [2022-01-31 19:35:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:35:22,748 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:35:22,748 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:35:22,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:35:22,749 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:35:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:35:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:35:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:35:42,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:35:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845392320] [2022-01-31 19:35:42,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [845392320] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:35:42,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:35:42,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 19:35:42,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103257493] [2022-01-31 19:35:42,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:35:42,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 19:35:42,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:35:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 19:35:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1919, Invalid=13831, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 19:35:42,266 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 126 states, 126 states have (on average 1.0476190476190477) internal successors, (132), 124 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:03,929 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2022-01-31 19:36:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 19:36:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.0476190476190477) internal successors, (132), 124 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-01-31 19:36:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:03,930 INFO L225 Difference]: With dead ends: 231 [2022-01-31 19:36:03,930 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 19:36:03,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13486 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=3009, Invalid=37191, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 19:36:03,932 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5906 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 6752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 5906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:03,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 274 Invalid, 6752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 5906 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-31 19:36:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 19:36:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 184. [2022-01-31 19:36:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-01-31 19:36:04,169 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 136 [2022-01-31 19:36:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:04,169 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-01-31 19:36:04,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.0476190476190477) internal successors, (132), 124 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-01-31 19:36:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 19:36:04,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:04,170 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:04,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:36:04,170 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash 784211529, now seen corresponding path program 58 times [2022-01-31 19:36:04,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:04,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760420057] [2022-01-31 19:36:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:04,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:04,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:04,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:04,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:04,742 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:04,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760420057] [2022-01-31 19:36:04,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [760420057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:04,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:04,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:36:04,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791615540] [2022-01-31 19:36:04,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:04,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:36:04,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:04,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:36:04,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1559, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:36:04,743 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:05,755 INFO L93 Difference]: Finished difference Result 326 states and 333 transitions. [2022-01-31 19:36:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:36:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 19:36:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:05,756 INFO L225 Difference]: With dead ends: 326 [2022-01-31 19:36:05,756 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 19:36:05,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=995, Invalid=3427, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:36:05,757 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 348 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:05,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 41 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:36:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 19:36:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2022-01-31 19:36:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-01-31 19:36:06,025 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 138 [2022-01-31 19:36:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:06,025 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-01-31 19:36:06,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-01-31 19:36:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 19:36:06,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:06,026 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:06,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:36:06,026 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:06,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:06,026 INFO L85 PathProgramCache]: Analyzing trace with hash -186691895, now seen corresponding path program 59 times [2022-01-31 19:36:06,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:06,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129954752] [2022-01-31 19:36:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:06,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:06,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:06,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:06,029 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:06,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:06,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:06,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129954752] [2022-01-31 19:36:06,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129954752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:06,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:06,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:36:06,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298754882] [2022-01-31 19:36:06,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:06,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:36:06,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:06,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:36:06,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:36:06,612 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:07,685 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2022-01-31 19:36:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 19:36:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-01-31 19:36:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:07,686 INFO L225 Difference]: With dead ends: 190 [2022-01-31 19:36:07,686 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 19:36:07,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1632, Invalid=6024, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:36:07,687 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 239 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:07,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 69 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:36:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 19:36:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-01-31 19:36:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2022-01-31 19:36:07,874 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2022-01-31 19:36:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:07,874 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2022-01-31 19:36:07,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0869565217391304) internal successors, (96), 45 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2022-01-31 19:36:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:36:07,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:07,875 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:07,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:36:07,875 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1107256389, now seen corresponding path program 60 times [2022-01-31 19:36:07,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:07,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106691972] [2022-01-31 19:36:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:07,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:07,877 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:07,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:07,879 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:28,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:28,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:28,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106691972] [2022-01-31 19:36:28,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [106691972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:28,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:28,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 19:36:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263190860] [2022-01-31 19:36:28,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:28,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 19:36:28,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 19:36:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1808, Invalid=14962, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 19:36:28,807 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 130 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 128 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:48,585 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2022-01-31 19:36:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 19:36:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 128 states have internal predecessors, (138), 2 states have call successors, (3), 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 142 [2022-01-31 19:36:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:48,587 INFO L225 Difference]: With dead ends: 197 [2022-01-31 19:36:48,587 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 19:36:48,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9913 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=3909, Invalid=38733, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 19:36:48,588 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 5104 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 5485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 5104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:48,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 196 Invalid, 5485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 5104 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 19:36:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 19:36:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2022-01-31 19:36:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.027972027972028) internal successors, (147), 143 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-01-31 19:36:48,856 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 142 [2022-01-31 19:36:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:48,856 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-01-31 19:36:48,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 128 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-01-31 19:36:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:36:48,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:48,857 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:48,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:36:48,857 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -65161309, now seen corresponding path program 61 times [2022-01-31 19:36:48,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:48,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786922276] [2022-01-31 19:36:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:48,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:48,859 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:48,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:48,863 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:49,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:49,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:49,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786922276] [2022-01-31 19:36:49,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [786922276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:49,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:49,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:36:49,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793406609] [2022-01-31 19:36:49,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:49,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:36:49,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:36:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:36:49,437 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:50,431 INFO L93 Difference]: Finished difference Result 296 states and 302 transitions. [2022-01-31 19:36:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:36:50,431 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-01-31 19:36:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:50,432 INFO L225 Difference]: With dead ends: 296 [2022-01-31 19:36:50,432 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 19:36:50,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1086, Invalid=3744, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:36:50,432 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 392 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:50,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 37 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:36:50,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 19:36:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2022-01-31 19:36:50,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2022-01-31 19:36:50,643 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2022-01-31 19:36:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:50,644 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2022-01-31 19:36:50,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2022-01-31 19:36:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:36:50,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:50,644 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:50,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:36:50,644 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash 589446209, now seen corresponding path program 62 times [2022-01-31 19:36:50,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:50,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264970227] [2022-01-31 19:36:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:50,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:50,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:50,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:50,647 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:51,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:36:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:36:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:36:51,227 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:36:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264970227] [2022-01-31 19:36:51,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [264970227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:36:51,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:36:51,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:36:51,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778625968] [2022-01-31 19:36:51,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:36:51,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:36:51,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:36:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:36:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=1720, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:36:51,229 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:36:52,557 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2022-01-31 19:36:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:36:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-01-31 19:36:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:36:52,558 INFO L225 Difference]: With dead ends: 154 [2022-01-31 19:36:52,558 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:36:52,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1786, Invalid=6586, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:36:52,559 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 257 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:36:52,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 63 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:36:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:36:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-01-31 19:36:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-01-31 19:36:52,788 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2022-01-31 19:36:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:36:52,788 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-01-31 19:36:52,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 47 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:36:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-01-31 19:36:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 19:36:52,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:36:52,789 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:36:52,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:36:52,789 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:36:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:36:52,790 INFO L85 PathProgramCache]: Analyzing trace with hash 535462047, now seen corresponding path program 63 times [2022-01-31 19:36:52,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:36:52,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249414900] [2022-01-31 19:36:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:36:52,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:36:52,791 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:36:52,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:36:52,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:36:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:16,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:16,489 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:16,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249414900] [2022-01-31 19:37:16,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249414900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:16,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:16,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 19:37:16,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98558400] [2022-01-31 19:37:16,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:16,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 19:37:16,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:16,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 19:37:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2002, Invalid=16088, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 19:37:16,491 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 135 states, 135 states have (on average 1.0666666666666667) internal successors, (144), 133 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:37,711 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2022-01-31 19:37:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 19:37:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.0666666666666667) internal successors, (144), 133 states have internal predecessors, (144), 2 states have call successors, (3), 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 148 [2022-01-31 19:37:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:37,712 INFO L225 Difference]: With dead ends: 206 [2022-01-31 19:37:37,712 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 19:37:37,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10684 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=4246, Invalid=41764, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 19:37:37,714 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 5839 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 6148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 5839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:37,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 238 Invalid, 6148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 5839 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 19:37:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 19:37:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2022-01-31 19:37:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-01-31 19:37:37,956 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 148 [2022-01-31 19:37:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:37,957 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-01-31 19:37:37,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.0666666666666667) internal successors, (144), 133 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-01-31 19:37:37,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:37:37,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:37,957 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:37,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:37:37,958 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash 196289917, now seen corresponding path program 64 times [2022-01-31 19:37:37,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409766630] [2022-01-31 19:37:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:37,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:37,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:37,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:37,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:38,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:38,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409766630] [2022-01-31 19:37:38,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [409766630] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:38,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:38,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:37:38,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296788924] [2022-01-31 19:37:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:38,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:37:38,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:37:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=1845, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:37:38,547 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:39,652 INFO L93 Difference]: Finished difference Result 308 states and 314 transitions. [2022-01-31 19:37:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:37:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 19:37:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:39,662 INFO L225 Difference]: With dead ends: 308 [2022-01-31 19:37:39,662 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 19:37:39,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1181, Invalid=4075, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:37:39,662 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 360 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:39,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 51 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:37:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 19:37:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2022-01-31 19:37:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-01-31 19:37:39,910 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2022-01-31 19:37:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:39,911 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-01-31 19:37:39,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-01-31 19:37:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:37:39,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:39,911 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:39,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:37:39,912 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1244093339, now seen corresponding path program 65 times [2022-01-31 19:37:39,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:39,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623812369] [2022-01-31 19:37:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:39,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:39,914 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:39,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:39,916 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:40,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:37:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:37:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:37:40,661 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:37:40,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623812369] [2022-01-31 19:37:40,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623812369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:37:40,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:37:40,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:37:40,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055176599] [2022-01-31 19:37:40,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:37:40,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:37:40,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:37:40,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:37:40,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:37:40,662 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:37:42,006 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2022-01-31 19:37:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 19:37:42,006 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 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 152 [2022-01-31 19:37:42,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:37:42,007 INFO L225 Difference]: With dead ends: 160 [2022-01-31 19:37:42,007 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 19:37:42,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1947, Invalid=7173, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 19:37:42,010 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 273 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:37:42,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 59 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:37:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 19:37:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-01-31 19:37:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2022-01-31 19:37:42,254 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2022-01-31 19:37:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:37:42,254 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2022-01-31 19:37:42,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.08) internal successors, (104), 49 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:37:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2022-01-31 19:37:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:37:42,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:37:42,255 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:37:42,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:37:42,255 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:37:42,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:37:42,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1708838535, now seen corresponding path program 66 times [2022-01-31 19:37:42,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:37:42,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918648172] [2022-01-31 19:37:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:37:42,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:37:42,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:37:42,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:37:42,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:37:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:09,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:09,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:09,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918648172] [2022-01-31 19:38:09,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [918648172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:09,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:09,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 19:38:09,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894871283] [2022-01-31 19:38:09,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:09,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 19:38:09,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:09,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 19:38:09,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2263, Invalid=18043, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 19:38:09,303 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 143 states, 143 states have (on average 1.048951048951049) internal successors, (150), 141 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:33,272 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-01-31 19:38:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 19:38:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.048951048951049) internal successors, (150), 141 states have internal predecessors, (150), 2 states have call successors, (3), 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 154 [2022-01-31 19:38:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:33,273 INFO L225 Difference]: With dead ends: 214 [2022-01-31 19:38:33,273 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:38:33,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11958 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=4936, Invalid=46366, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 19:38:33,276 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 5573 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 5946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 5573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:33,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 206 Invalid, 5946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 5573 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 19:38:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:38:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 160. [2022-01-31 19:38:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-01-31 19:38:33,556 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 154 [2022-01-31 19:38:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:33,556 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-01-31 19:38:33,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.048951048951049) internal successors, (150), 141 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-01-31 19:38:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:38:33,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:33,557 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:33,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:38:33,557 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash -502986793, now seen corresponding path program 67 times [2022-01-31 19:38:33,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:33,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6178936] [2022-01-31 19:38:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:33,559 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:33,559 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:33,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:33,560 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:34,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:34,206 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6178936] [2022-01-31 19:38:34,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [6178936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:34,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:34,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:38:34,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917289510] [2022-01-31 19:38:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:34,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:38:34,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:34,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:38:34,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=1997, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:38:34,207 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:35,323 INFO L93 Difference]: Finished difference Result 320 states and 326 transitions. [2022-01-31 19:38:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 19:38:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-01-31 19:38:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:35,324 INFO L225 Difference]: With dead ends: 320 [2022-01-31 19:38:35,324 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 19:38:35,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1280, Invalid=4420, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:38:35,325 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 403 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:35,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 39 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:38:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 19:38:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2022-01-31 19:38:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2022-01-31 19:38:35,580 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2022-01-31 19:38:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:35,580 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2022-01-31 19:38:35,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2022-01-31 19:38:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 19:38:35,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:35,581 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:35,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:38:35,581 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash 11915125, now seen corresponding path program 68 times [2022-01-31 19:38:35,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382434751] [2022-01-31 19:38:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:35,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:35,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:35,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:35,585 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:36,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:38:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:38:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:38:36,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:38:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382434751] [2022-01-31 19:38:36,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382434751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:38:36,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:38:36,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 19:38:36,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443895033] [2022-01-31 19:38:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:38:36,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 19:38:36,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:38:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 19:38:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 19:38:36,303 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:38:37,378 INFO L93 Difference]: Finished difference Result 166 states and 168 transitions. [2022-01-31 19:38:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 19:38:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 19:38:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:38:37,379 INFO L225 Difference]: With dead ends: 166 [2022-01-31 19:38:37,379 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 19:38:37,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2115, Invalid=7785, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 19:38:37,381 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 295 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:38:37,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 75 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:38:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 19:38:37,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-01-31 19:38:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-01-31 19:38:37,712 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2022-01-31 19:38:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:38:37,712 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-01-31 19:38:37,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.076923076923077) internal successors, (108), 51 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:38:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-01-31 19:38:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 19:38:37,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:38:37,713 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:38:37,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:38:37,713 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:38:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:38:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash -421128493, now seen corresponding path program 69 times [2022-01-31 19:38:37,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:38:37,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462987693] [2022-01-31 19:38:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:38:37,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:38:37,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:38:37,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:38:37,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:38:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:11,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:11,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:11,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462987693] [2022-01-31 19:39:11,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [462987693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:11,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:11,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 19:39:11,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821966568] [2022-01-31 19:39:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:11,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 19:39:11,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 19:39:11,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2499, Invalid=20151, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 19:39:11,978 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 151 states, 151 states have (on average 1.033112582781457) internal successors, (156), 149 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:52,331 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2022-01-31 19:39:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 19:39:52,332 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.033112582781457) internal successors, (156), 149 states have internal predecessors, (156), 2 states have call successors, (3), 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 160 [2022-01-31 19:39:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:52,332 INFO L225 Difference]: With dead ends: 222 [2022-01-31 19:39:52,332 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 19:39:52,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21248 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=7857, Invalid=72515, Unknown=0, NotChecked=0, Total=80372 [2022-01-31 19:39:52,336 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 6396 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 6396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:52,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 218 Invalid, 6884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 6396 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-01-31 19:39:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 19:39:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 166. [2022-01-31 19:39:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-01-31 19:39:52,739 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 160 [2022-01-31 19:39:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:52,739 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-01-31 19:39:52,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.033112582781457) internal successors, (156), 149 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-01-31 19:39:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:39:52,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:52,760 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:52,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:39:52,760 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 35782321, now seen corresponding path program 70 times [2022-01-31 19:39:52,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451090355] [2022-01-31 19:39:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:52,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:52,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:52,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:52,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:53,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:53,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451090355] [2022-01-31 19:39:53,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1451090355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:53,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:53,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:39:53,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357585168] [2022-01-31 19:39:53,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:53,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:39:53,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:53,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:39:53,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:39:53,775 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:55,160 INFO L93 Difference]: Finished difference Result 332 states and 338 transitions. [2022-01-31 19:39:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:39:55,160 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-01-31 19:39:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:55,161 INFO L225 Difference]: With dead ends: 332 [2022-01-31 19:39:55,161 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 19:39:55,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1383, Invalid=4779, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:39:55,161 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 363 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:55,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 61 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:39:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 19:39:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-01-31 19:39:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-01-31 19:39:55,483 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2022-01-31 19:39:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:55,483 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-01-31 19:39:55,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-01-31 19:39:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:39:55,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:55,485 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:55,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:39:55,485 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -692832305, now seen corresponding path program 71 times [2022-01-31 19:39:55,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:55,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311711224] [2022-01-31 19:39:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:55,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:55,487 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:55,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:55,488 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:56,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:39:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:39:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:39:56,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:39:56,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311711224] [2022-01-31 19:39:56,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311711224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:39:56,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:39:56,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 19:39:56,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621982938] [2022-01-31 19:39:56,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:39:56,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 19:39:56,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:39:56,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 19:39:56,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:39:56,080 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:39:57,609 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2022-01-31 19:39:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:39:57,609 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 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 164 [2022-01-31 19:39:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:39:57,610 INFO L225 Difference]: With dead ends: 172 [2022-01-31 19:39:57,610 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 19:39:57,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2290, Invalid=8422, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 19:39:57,612 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 272 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:39:57,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 69 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:39:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 19:39:57,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-01-31 19:39:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2022-01-31 19:39:57,966 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2022-01-31 19:39:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:39:57,966 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2022-01-31 19:39:57,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.074074074074074) internal successors, (112), 53 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:39:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2022-01-31 19:39:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:39:57,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:39:57,967 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:39:57,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:39:57,967 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:39:57,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:39:57,967 INFO L85 PathProgramCache]: Analyzing trace with hash 921424045, now seen corresponding path program 72 times [2022-01-31 19:39:57,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:39:57,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216554396] [2022-01-31 19:39:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:39:57,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:39:57,971 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:39:57,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:39:57,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:39:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:34,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216554396] [2022-01-31 19:40:34,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216554396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:34,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:34,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 19:40:34,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770343690] [2022-01-31 19:40:34,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:34,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 19:40:34,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:34,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 19:40:34,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2253, Invalid=21617, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 19:40:34,024 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 155 states, 155 states have (on average 1.0451612903225806) internal successors, (162), 153 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:05,713 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2022-01-31 19:41:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 19:41:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.0451612903225806) internal successors, (162), 153 states have internal predecessors, (162), 2 states have call successors, (3), 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 166 [2022-01-31 19:41:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:05,714 INFO L225 Difference]: With dead ends: 229 [2022-01-31 19:41:05,714 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 19:41:05,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14510 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=5483, Invalid=55773, Unknown=0, NotChecked=0, Total=61256 [2022-01-31 19:41:05,717 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 6992 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 7472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 6992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:05,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 228 Invalid, 7472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 6992 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 19:41:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 19:41:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 172. [2022-01-31 19:41:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 167 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-01-31 19:41:06,039 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 166 [2022-01-31 19:41:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-01-31 19:41:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.0451612903225806) internal successors, (162), 153 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-01-31 19:41:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 19:41:06,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:06,040 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:06,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:41:06,040 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:06,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1738582539, now seen corresponding path program 73 times [2022-01-31 19:41:06,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:06,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527331951] [2022-01-31 19:41:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:06,042 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:06,042 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:06,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:06,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:06,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:06,774 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527331951] [2022-01-31 19:41:06,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527331951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:06,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:06,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:41:06,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329380330] [2022-01-31 19:41:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:06,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:41:06,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:41:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=2319, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:41:06,775 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:08,019 INFO L93 Difference]: Finished difference Result 344 states and 350 transitions. [2022-01-31 19:41:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:41:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 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 168 [2022-01-31 19:41:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:08,020 INFO L225 Difference]: With dead ends: 344 [2022-01-31 19:41:08,020 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 19:41:08,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1490, Invalid=5152, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:41:08,020 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 534 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:08,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 35 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:41:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 19:41:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 171. [2022-01-31 19:41:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2022-01-31 19:41:08,334 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2022-01-31 19:41:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:08,334 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2022-01-31 19:41:08,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2022-01-31 19:41:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:41:08,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:08,335 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:08,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:41:08,335 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1385247913, now seen corresponding path program 74 times [2022-01-31 19:41:08,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:08,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186889124] [2022-01-31 19:41:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:08,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:08,337 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:08,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:08,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:08,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:08,917 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:08,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186889124] [2022-01-31 19:41:08,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [186889124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:08,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:08,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:41:08,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590758999] [2022-01-31 19:41:08,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:08,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:41:08,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:41:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=2344, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:41:08,918 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:10,166 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2022-01-31 19:41:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 19:41:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 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 170 [2022-01-31 19:41:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:10,167 INFO L225 Difference]: With dead ends: 178 [2022-01-31 19:41:10,167 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 19:41:10,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2472, Invalid=9084, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 19:41:10,168 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 266 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1643 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:10,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 73 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:41:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 19:41:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-01-31 19:41:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0178571428571428) internal successors, (171), 168 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-01-31 19:41:10,522 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2022-01-31 19:41:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:10,523 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-01-31 19:41:10,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 55 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-01-31 19:41:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:41:10,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:10,523 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:10,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:41:10,524 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 796720903, now seen corresponding path program 75 times [2022-01-31 19:41:10,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392750566] [2022-01-31 19:41:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:10,532 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:10,532 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:10,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:10,534 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:47,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:47,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:47,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392750566] [2022-01-31 19:41:47,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392750566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:47,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:47,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-01-31 19:41:47,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724378796] [2022-01-31 19:41:47,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:47,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 19:41:47,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 19:41:47,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2845, Invalid=22915, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 19:41:47,226 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 161 states, 161 states have (on average 1.0434782608695652) internal successors, (168), 159 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:20,688 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2022-01-31 19:42:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-31 19:42:20,689 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.0434782608695652) internal successors, (168), 159 states have internal predecessors, (168), 2 states have call successors, (3), 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 172 [2022-01-31 19:42:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:20,689 INFO L225 Difference]: With dead ends: 237 [2022-01-31 19:42:20,689 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 19:42:20,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15346 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=6296, Invalid=59496, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 19:42:20,692 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 6913 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 7304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 6913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:20,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 200 Invalid, 7304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 6913 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-01-31 19:42:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 19:42:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 178. [2022-01-31 19:42:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.023121387283237) internal successors, (177), 173 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2022-01-31 19:42:21,081 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 172 [2022-01-31 19:42:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:21,081 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2022-01-31 19:42:21,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.0434782608695652) internal successors, (168), 159 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2022-01-31 19:42:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:42:21,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:21,090 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:21,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:42:21,090 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2137019931, now seen corresponding path program 76 times [2022-01-31 19:42:21,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:21,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301714418] [2022-01-31 19:42:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:21,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:21,092 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:21,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:21,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:21,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:21,859 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:21,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301714418] [2022-01-31 19:42:21,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [301714418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:21,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:21,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:42:21,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598363103] [2022-01-31 19:42:21,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:21,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:42:21,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:42:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=817, Invalid=2489, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:42:21,860 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:23,338 INFO L93 Difference]: Finished difference Result 356 states and 362 transitions. [2022-01-31 19:42:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 19:42:23,338 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 19:42:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:23,339 INFO L225 Difference]: With dead ends: 356 [2022-01-31 19:42:23,339 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:42:23,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1601, Invalid=5539, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:42:23,340 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 414 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:23,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 55 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:42:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:42:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2022-01-31 19:42:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-01-31 19:42:23,695 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2022-01-31 19:42:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:23,695 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-01-31 19:42:23,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-01-31 19:42:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 19:42:23,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:23,696 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:23,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:42:23,696 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1799579139, now seen corresponding path program 77 times [2022-01-31 19:42:23,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:23,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794975438] [2022-01-31 19:42:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:23,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:23,698 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:23,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:23,700 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:24,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:24,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:24,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794975438] [2022-01-31 19:42:24,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [794975438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:24,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:24,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 19:42:24,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146850873] [2022-01-31 19:42:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:24,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 19:42:24,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 19:42:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=2515, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:42:24,529 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:25,966 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-01-31 19:42:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 19:42:25,966 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-01-31 19:42:25,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:25,967 INFO L225 Difference]: With dead ends: 184 [2022-01-31 19:42:25,967 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 19:42:25,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2661, Invalid=9771, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 19:42:25,967 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 322 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:25,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 67 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:42:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 19:42:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-01-31 19:42:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2022-01-31 19:42:26,326 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2022-01-31 19:42:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:26,326 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2022-01-31 19:42:26,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 57 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2022-01-31 19:42:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 19:42:26,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:26,330 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:26,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:42:26,331 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -462929439, now seen corresponding path program 78 times [2022-01-31 19:42:26,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:26,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012864241] [2022-01-31 19:42:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:26,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:26,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:26,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:26,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:07,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:07,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:07,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012864241] [2022-01-31 19:43:07,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012864241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:07,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:07,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-01-31 19:43:07,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613198074] [2022-01-31 19:43:07,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:07,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-01-31 19:43:07,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-01-31 19:43:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2750, Invalid=24972, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 19:43:07,431 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 167 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 165 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:43,567 INFO L93 Difference]: Finished difference Result 246 states and 250 transitions. [2022-01-31 19:43:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-01-31 19:43:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 165 states have internal predecessors, (174), 2 states have call successors, (3), 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 178 [2022-01-31 19:43:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:43,568 INFO L225 Difference]: With dead ends: 246 [2022-01-31 19:43:43,568 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 19:43:43,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16185 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=5445, Invalid=63987, Unknown=0, NotChecked=0, Total=69432 [2022-01-31 19:43:43,572 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 8549 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 8549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:43,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 282 Invalid, 8923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 8549 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 19:43:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 19:43:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 184. [2022-01-31 19:43:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0223463687150838) internal successors, (183), 179 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-01-31 19:43:44,003 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 178 [2022-01-31 19:43:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:44,003 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-01-31 19:43:44,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.0419161676646707) internal successors, (174), 165 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-01-31 19:43:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:43:44,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:44,004 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:44,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:43:44,004 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1480221121, now seen corresponding path program 79 times [2022-01-31 19:43:44,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:44,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603313313] [2022-01-31 19:43:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:44,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:44,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:44,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:44,007 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:44,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:44,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:44,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603313313] [2022-01-31 19:43:44,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603313313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:44,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:44,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:43:44,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143345556] [2022-01-31 19:43:44,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:44,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:43:44,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:44,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:43:44,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=875, Invalid=2665, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:43:44,795 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:46,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:46,362 INFO L93 Difference]: Finished difference Result 368 states and 374 transitions. [2022-01-31 19:43:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:43:46,363 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-01-31 19:43:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:46,363 INFO L225 Difference]: With dead ends: 368 [2022-01-31 19:43:46,364 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 19:43:46,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1716, Invalid=5940, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 19:43:46,364 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 498 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:46,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 53 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:43:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 19:43:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2022-01-31 19:43:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0168539325842696) internal successors, (181), 178 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2022-01-31 19:43:46,772 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2022-01-31 19:43:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:46,772 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2022-01-31 19:43:46,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2022-01-31 19:43:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 19:43:46,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:46,773 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:46,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:43:46,773 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:46,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2109117475, now seen corresponding path program 80 times [2022-01-31 19:43:46,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:46,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667760347] [2022-01-31 19:43:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:46,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:46,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:46,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:46,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:47,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:47,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:47,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667760347] [2022-01-31 19:43:47,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [667760347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:47,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:47,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 19:43:47,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933314329] [2022-01-31 19:43:47,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:47,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 19:43:47,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:47,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 19:43:47,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=848, Invalid=2692, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:43:47,633 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:49,460 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2022-01-31 19:43:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:43:49,461 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 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 182 [2022-01-31 19:43:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:49,461 INFO L225 Difference]: With dead ends: 190 [2022-01-31 19:43:49,461 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 19:43:49,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2857, Invalid=10483, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 19:43:49,462 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 302 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:49,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 75 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1861 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:43:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 19:43:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-01-31 19:43:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0166666666666666) internal successors, (183), 180 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2022-01-31 19:43:49,844 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2022-01-31 19:43:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:49,844 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2022-01-31 19:43:49,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.066666666666667) internal successors, (124), 59 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2022-01-31 19:43:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 19:43:49,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:49,845 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:49,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:43:49,845 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:49,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1376008507, now seen corresponding path program 81 times [2022-01-31 19:43:49,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:49,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400629299] [2022-01-31 19:43:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:49,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:49,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:49,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:49,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:40,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:40,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400629299] [2022-01-31 19:44:40,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [400629299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:40,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:40,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [175] imperfect sequences [] total 175 [2022-01-31 19:44:40,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003728422] [2022-01-31 19:44:40,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:40,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2022-01-31 19:44:40,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2022-01-31 19:44:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2721, Invalid=27729, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 19:44:40,704 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 175 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 173 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:42,252 INFO L93 Difference]: Finished difference Result 254 states and 258 transitions. [2022-01-31 19:45:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-31 19:45:42,253 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 173 states have internal predecessors, (180), 2 states have call successors, (3), 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 184 [2022-01-31 19:45:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:42,253 INFO L225 Difference]: With dead ends: 254 [2022-01-31 19:45:42,254 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 19:45:42,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26858 ImplicationChecksByTransitivity, 84.8s TimeCoverageRelationStatistics Valid=8867, Invalid=99703, Unknown=0, NotChecked=0, Total=108570 [2022-01-31 19:45:42,258 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 8325 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 8875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 8325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:42,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 248 Invalid, 8875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 8325 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-31 19:45:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 19:45:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 190. [2022-01-31 19:45:42,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0216216216216216) internal successors, (189), 185 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 193 transitions. [2022-01-31 19:45:42,724 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 193 transitions. Word has length 184 [2022-01-31 19:45:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:42,724 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 193 transitions. [2022-01-31 19:45:42,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 173 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 193 transitions. [2022-01-31 19:45:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 19:45:42,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:42,725 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:42,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:45:42,725 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash 507586329, now seen corresponding path program 82 times [2022-01-31 19:45:42,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:42,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142153000] [2022-01-31 19:45:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:42,727 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:42,727 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:42,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:42,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:43,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:43,588 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142153000] [2022-01-31 19:45:43,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2142153000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:43,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:43,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:45:43,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793942320] [2022-01-31 19:45:43,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:45:43,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:45:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=935, Invalid=2847, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:45:43,590 INFO L87 Difference]: Start difference. First operand 190 states and 193 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:45,204 INFO L93 Difference]: Finished difference Result 380 states and 386 transitions. [2022-01-31 19:45:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 19:45:45,204 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-01-31 19:45:45,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:45,205 INFO L225 Difference]: With dead ends: 380 [2022-01-31 19:45:45,205 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 19:45:45,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1835, Invalid=6355, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:45:45,206 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 492 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:45,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 65 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:45:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 19:45:45,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 189. [2022-01-31 19:45:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.016304347826087) internal successors, (187), 184 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2022-01-31 19:45:45,654 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2022-01-31 19:45:45,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:45,654 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2022-01-31 19:45:45,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2022-01-31 19:45:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 19:45:45,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:45,656 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:45,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:45:45,657 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -576068041, now seen corresponding path program 83 times [2022-01-31 19:45:45,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395991688] [2022-01-31 19:45:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:45,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:45,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:45,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:45,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:46,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:46,521 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:46,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395991688] [2022-01-31 19:45:46,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395991688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:46,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:46,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:45:46,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982331507] [2022-01-31 19:45:46,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:46,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:45:46,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:45:46,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=2875, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:45:46,523 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:48,385 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2022-01-31 19:45:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 19:45:48,385 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 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 188 [2022-01-31 19:45:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:48,386 INFO L225 Difference]: With dead ends: 196 [2022-01-31 19:45:48,386 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 19:45:48,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3060, Invalid=11220, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 19:45:48,387 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 355 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:48,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 81 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:45:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 19:45:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 19:45:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2022-01-31 19:45:48,806 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2022-01-31 19:45:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:48,806 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2022-01-31 19:45:48,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.064516129032258) internal successors, (128), 61 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2022-01-31 19:45:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:45:48,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:48,807 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:48,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:45:48,807 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1462732053, now seen corresponding path program 84 times [2022-01-31 19:45:48,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:48,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157414664] [2022-01-31 19:45:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:48,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:48,809 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:48,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:48,811 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat