/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_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:42:51,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:42:51,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:42:51,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:42:51,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:42:51,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:42:51,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:42:51,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:42:51,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:42:51,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:42:51,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:42:51,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:42:51,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:42:51,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:42:51,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:42:51,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:42:51,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:42:51,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:42:51,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:42:51,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:42:51,719 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 19:42:51,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:42:51,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:42:51,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:42:51,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:42:51,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:42:51,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:42:51,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:42:51,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:42:51,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:42:51,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:42:51,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:42:51,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:42:51,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:42:51,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:42:51,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:42:51,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:42:51,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:42:51,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:42:51,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:42:51,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:42:51,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:42:51,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:42:51,731 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:42:51,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:42:51,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:42:51,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:42:51,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:42:51,934 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:42:51,935 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:42:51,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2022-01-31 19:42:51,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a60396/fbcb0a5bb39c416987271a003b186b88/FLAG46b40e39f [2022-01-31 19:42:52,369 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:42:52,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2022-01-31 19:42:52,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a60396/fbcb0a5bb39c416987271a003b186b88/FLAG46b40e39f [2022-01-31 19:42:52,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e79a60396/fbcb0a5bb39c416987271a003b186b88 [2022-01-31 19:42:52,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:42:52,393 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:42:52,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:42:52,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:42:52,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:42:52,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e4d7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52, skipping insertion in model container [2022-01-31 19:42:52,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:42:52,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:42:52,563 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_m4.c[402,415] [2022-01-31 19:42:52,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:42:52,604 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:42:52,619 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_m4.c[402,415] [2022-01-31 19:42:52,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:42:52,651 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:42:52,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52 WrapperNode [2022-01-31 19:42:52,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:42:52,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:42:52,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:42:52,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:42:52,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:42:52,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:42:52,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:42:52,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:42:52,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (1/1) ... [2022-01-31 19:42:52,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:42:52,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:42:52,736 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 19:42:52,748 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 19:42:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:42:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:42:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:42:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:42:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:42:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:42:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:42:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:42:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:42:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:42:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:42:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:42:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 19:42:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:42:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:42:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:42:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:42:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:42:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:42:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:42:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:42:52,835 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:42:52,836 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:42:53,028 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:42:53,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:42:53,033 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-31 19:42:53,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:42:53 BoogieIcfgContainer [2022-01-31 19:42:53,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:42:53,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:42:53,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:42:53,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:42:53,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:42:52" (1/3) ... [2022-01-31 19:42:53,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6605cda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:42:53, skipping insertion in model container [2022-01-31 19:42:53,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:42:52" (2/3) ... [2022-01-31 19:42:53,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6605cda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:42:53, skipping insertion in model container [2022-01-31 19:42:53,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:42:53" (3/3) ... [2022-01-31 19:42:53,039 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2022-01-31 19:42:53,042 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:42:53,043 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:42:53,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:42:53,075 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 19:42:53,076 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:42:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 39 states have internal predecessors, (59), 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 19:42:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 19:42:53,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:53,107 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, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:53,108 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1982508196, now seen corresponding path program 1 times [2022-01-31 19:42:53,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:53,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767667598] [2022-01-31 19:42:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:53,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:53,187 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:53,358 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767667598] [2022-01-31 19:42:53,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767667598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:53,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:53,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:42:53,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801882185] [2022-01-31 19:42:53,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:53,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:42:53,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:42:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:42:53,390 INFO L87 Difference]: Start difference. First operand has 46 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 39 states have internal predecessors, (59), 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 6.0) internal successors, (24), 3 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 19:42:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:53,515 INFO L93 Difference]: Finished difference Result 85 states and 123 transitions. [2022-01-31 19:42:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:42:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 19:42:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:53,523 INFO L225 Difference]: With dead ends: 85 [2022-01-31 19:42:53,524 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 19:42:53,526 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 19:42:53,528 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:53,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 83 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:42:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 19:42:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-31 19:42:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-01-31 19:42:53,556 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2022-01-31 19:42:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:53,556 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-01-31 19:42:53,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 19:42:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-01-31 19:42:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:42:53,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:53,557 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:53,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:42:53,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:53,558 INFO L85 PathProgramCache]: Analyzing trace with hash -80624464, now seen corresponding path program 1 times [2022-01-31 19:42:53,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:53,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715289533] [2022-01-31 19:42:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:53,571 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:53,571 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:53,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:53,573 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:53,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:53,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:53,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715289533] [2022-01-31 19:42:53,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [715289533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:53,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:53,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:42:53,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583904164] [2022-01-31 19:42:53,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:53,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:42:53,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:53,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:42:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:42:53,658 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 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 19:42:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:53,783 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2022-01-31 19:42:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:42:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have 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 19:42:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:53,784 INFO L225 Difference]: With dead ends: 81 [2022-01-31 19:42:53,784 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 19:42:53,785 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 19:42:53,785 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:53,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:42:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 19:42:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2022-01-31 19:42:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 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 19:42:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-01-31 19:42:53,794 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2022-01-31 19:42:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:53,795 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-01-31 19:42:53,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 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 19:42:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-01-31 19:42:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 19:42:53,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:53,796 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, 1, 1, 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 19:42:53,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:42:53,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash -74067296, now seen corresponding path program 1 times [2022-01-31 19:42:53,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:53,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69428928] [2022-01-31 19:42:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:53,799 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:53,799 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:53,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:53,800 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:53,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:53,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:53,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69428928] [2022-01-31 19:42:53,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [69428928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:53,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:53,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:42:53,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082655929] [2022-01-31 19:42:53,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:53,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:42:53,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:42:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:42:53,862 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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 19:42:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:53,958 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-01-31 19:42:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:42:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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 19:42:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:53,960 INFO L225 Difference]: With dead ends: 86 [2022-01-31 19:42:53,960 INFO L226 Difference]: Without dead ends: 49 [2022-01-31 19:42:53,961 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 19:42:53,962 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:53,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 88 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:42:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-31 19:42:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-01-31 19:42:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 3 states have call successors, (3), 3 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 19:42:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-01-31 19:42:53,969 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2022-01-31 19:42:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:53,969 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-01-31 19:42:53,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 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 19:42:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-01-31 19:42:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 19:42:53,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:53,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:53,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:42:53,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1671108542, now seen corresponding path program 2 times [2022-01-31 19:42:53,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:53,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26433628] [2022-01-31 19:42:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:53,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:53,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:53,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:53,975 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:54,038 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 19:42:54,039 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:54,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26433628] [2022-01-31 19:42:54,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [26433628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:54,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:54,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:42:54,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047432307] [2022-01-31 19:42:54,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:54,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:42:54,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:42:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:42:54,041 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 19:42:54,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:54,160 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2022-01-31 19:42:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:42:54,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 48 [2022-01-31 19:42:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:54,162 INFO L225 Difference]: With dead ends: 98 [2022-01-31 19:42:54,162 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 19:42:54,163 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 19:42:54,177 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:54,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 32 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:42:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 19:42:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-01-31 19:42:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.15) internal successors, (69), 60 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 19:42:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-01-31 19:42:54,187 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2022-01-31 19:42:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:54,187 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-01-31 19:42:54,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 19:42:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-01-31 19:42:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 19:42:54,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:54,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:54,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:42:54,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash -843970130, now seen corresponding path program 3 times [2022-01-31 19:42:54,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:54,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671411144] [2022-01-31 19:42:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:54,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:54,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:54,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:54,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:56,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:56,125 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671411144] [2022-01-31 19:42:56,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [671411144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:56,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:56,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:42:56,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543413433] [2022-01-31 19:42:56,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:56,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:42:56,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:56,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:42:56,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1318, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:42:56,127 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 36 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 19:42:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:56,990 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2022-01-31 19:42:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:42:56,991 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 36 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 19:42:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:56,992 INFO L225 Difference]: With dead ends: 115 [2022-01-31 19:42:56,992 INFO L226 Difference]: Without dead ends: 110 [2022-01-31 19:42:56,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=1462, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:42:56,993 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:56,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 325 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:42:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-31 19:42:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2022-01-31 19:42:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 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 19:42:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-01-31 19:42:57,006 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2022-01-31 19:42:57,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:57,006 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-01-31 19:42:57,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 36 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 19:42:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-01-31 19:42:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 19:42:57,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:57,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:57,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:42:57,008 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:57,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1460875980, now seen corresponding path program 4 times [2022-01-31 19:42:57,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387437674] [2022-01-31 19:42:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:57,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:57,010 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:57,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:57,011 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:57,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:57,084 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 19:42:57,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:57,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387437674] [2022-01-31 19:42:57,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [387437674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:57,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:57,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:42:57,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325481796] [2022-01-31 19:42:57,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:57,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:42:57,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:42:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:42:57,086 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 19:42:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:57,271 INFO L93 Difference]: Finished difference Result 206 states and 236 transitions. [2022-01-31 19:42:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:42:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 19:42:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:57,274 INFO L225 Difference]: With dead ends: 206 [2022-01-31 19:42:57,275 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 19:42:57,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:42:57,278 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:57,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 88 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:42:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 19:42:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-01-31 19:42:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 103 states have internal predecessors, (119), 3 states have call successors, (3), 3 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 19:42:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2022-01-31 19:42:57,311 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 66 [2022-01-31 19:42:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:57,311 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2022-01-31 19:42:57,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 19:42:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2022-01-31 19:42:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 19:42:57,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:57,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:57,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:42:57,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:57,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1051770090, now seen corresponding path program 5 times [2022-01-31 19:42:57,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:57,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109663800] [2022-01-31 19:42:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:57,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:57,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:57,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:57,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:57,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:57,402 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 19:42:57,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:57,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109663800] [2022-01-31 19:42:57,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109663800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:57,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:57,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:42:57,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588427200] [2022-01-31 19:42:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:57,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:42:57,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:42:57,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:42:57,404 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 19:42:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:57,576 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2022-01-31 19:42:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:42:57,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 19:42:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:57,578 INFO L225 Difference]: With dead ends: 165 [2022-01-31 19:42:57,578 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 19:42:57,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:42:57,579 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 149 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:57,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 55 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:42:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 19:42:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-31 19:42:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 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 19:42:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-01-31 19:42:57,587 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2022-01-31 19:42:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:57,587 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-01-31 19:42:57,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 19:42:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-01-31 19:42:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:42:57,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:57,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 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 19:42:57,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:42:57,588 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:57,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2087691972, now seen corresponding path program 6 times [2022-01-31 19:42:57,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:57,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485094958] [2022-01-31 19:42:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:57,590 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:57,590 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:57,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:57,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:00,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:00,657 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 19:43:00,658 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485094958] [2022-01-31 19:43:00,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485094958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:00,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:00,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 19:43:00,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392600364] [2022-01-31 19:43:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 19:43:00,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 19:43:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3516, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 19:43:00,661 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 62 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 60 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 19:43:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:03,895 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2022-01-31 19:43:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 19:43:03,895 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 60 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 19:43:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:03,896 INFO L225 Difference]: With dead ends: 154 [2022-01-31 19:43:03,896 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:43:03,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=568, Invalid=7442, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:43:03,899 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 3070 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:03,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 325 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3070 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:43:03,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:43:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2022-01-31 19:43:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 131 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 19:43:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2022-01-31 19:43:03,919 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 82 [2022-01-31 19:43:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:03,920 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2022-01-31 19:43:03,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 60 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 19:43:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2022-01-31 19:43:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:43:03,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:03,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 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 19:43:03,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:43:03,927 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash 850101978, now seen corresponding path program 7 times [2022-01-31 19:43:03,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:03,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209247281] [2022-01-31 19:43:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:03,930 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:03,930 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:03,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:03,931 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:04,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:04,015 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 19:43:04,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209247281] [2022-01-31 19:43:04,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209247281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:04,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:04,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:43:04,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104142815] [2022-01-31 19:43:04,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:04,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:43:04,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:04,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:43:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:43:04,017 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 19:43:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:04,279 INFO L93 Difference]: Finished difference Result 266 states and 296 transitions. [2022-01-31 19:43:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:43:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 84 [2022-01-31 19:43:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:04,280 INFO L225 Difference]: With dead ends: 266 [2022-01-31 19:43:04,280 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 19:43:04,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:43:04,283 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:04,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 112 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:43:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 19:43:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-01-31 19:43:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 133 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 153 transitions. [2022-01-31 19:43:04,321 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 153 transitions. Word has length 84 [2022-01-31 19:43:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:04,321 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 153 transitions. [2022-01-31 19:43:04,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 19:43:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 153 transitions. [2022-01-31 19:43:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 19:43:04,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:04,322 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 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 19:43:04,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:43:04,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1068631416, now seen corresponding path program 8 times [2022-01-31 19:43:04,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:04,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095043323] [2022-01-31 19:43:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:04,323 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:04,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:04,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:04,324 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:04,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:04,409 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:04,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095043323] [2022-01-31 19:43:04,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095043323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:04,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:04,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:43:04,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994943033] [2022-01-31 19:43:04,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:04,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:43:04,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:04,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:43:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:43:04,411 INFO L87 Difference]: Start difference. First operand 138 states and 153 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 19:43:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:04,611 INFO L93 Difference]: Finished difference Result 207 states and 235 transitions. [2022-01-31 19:43:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:43:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 86 [2022-01-31 19:43:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:04,612 INFO L225 Difference]: With dead ends: 207 [2022-01-31 19:43:04,612 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:43:04,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:43:04,613 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:04,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 65 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:43:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:43:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-31 19:43:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.09375) internal successors, (105), 96 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 19:43:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2022-01-31 19:43:04,622 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 86 [2022-01-31 19:43:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:04,623 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2022-01-31 19:43:04,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 19:43:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2022-01-31 19:43:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:43:04,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:04,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 19:43:04,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:43:04,624 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash -948199094, now seen corresponding path program 9 times [2022-01-31 19:43:04,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:04,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133636570] [2022-01-31 19:43:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:04,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:04,625 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:04,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:04,626 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:09,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:09,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133636570] [2022-01-31 19:43:09,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133636570] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:09,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:09,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 19:43:09,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683509707] [2022-01-31 19:43:09,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:09,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 19:43:09,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:09,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 19:43:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=5956, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:43:09,699 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 80 states, 80 states have (on average 1.2) internal successors, (96), 78 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 19:43:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:21,752 INFO L93 Difference]: Finished difference Result 275 states and 299 transitions. [2022-01-31 19:43:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 19:43:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2) internal successors, (96), 78 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 19:43:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:21,754 INFO L225 Difference]: With dead ends: 275 [2022-01-31 19:43:21,754 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 19:43:21,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1492, Invalid=19970, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 19:43:21,759 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 8076 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 8855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 8076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:21,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 503 Invalid, 8855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 8076 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-01-31 19:43:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 19:43:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 208. [2022-01-31 19:43:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.103448275862069) internal successors, (224), 203 states have internal predecessors, (224), 3 states have call successors, (3), 3 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 19:43:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 228 transitions. [2022-01-31 19:43:21,820 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 228 transitions. Word has length 100 [2022-01-31 19:43:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:21,821 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 228 transitions. [2022-01-31 19:43:21,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2) internal successors, (96), 78 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 19:43:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 228 transitions. [2022-01-31 19:43:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:43:21,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:21,822 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 19:43:21,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:43:21,822 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash 297525736, now seen corresponding path program 10 times [2022-01-31 19:43:21,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:21,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418550978] [2022-01-31 19:43:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:21,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:21,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:21,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:21,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:21,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:21,930 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 19:43:21,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:21,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418550978] [2022-01-31 19:43:21,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [418550978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:21,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:21,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:43:21,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242859287] [2022-01-31 19:43:21,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:21,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:43:21,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:21,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:43:21,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:43:21,932 INFO L87 Difference]: Start difference. First operand 208 states and 228 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 19:43:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:22,206 INFO L93 Difference]: Finished difference Result 328 states and 359 transitions. [2022-01-31 19:43:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:43:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 102 [2022-01-31 19:43:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:22,207 INFO L225 Difference]: With dead ends: 328 [2022-01-31 19:43:22,207 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 19:43:22,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:43:22,208 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:22,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 94 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:43:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 19:43:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-01-31 19:43:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 98 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-01-31 19:43:22,221 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 102 [2022-01-31 19:43:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:22,221 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-01-31 19:43:22,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 19:43:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-01-31 19:43:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:43:22,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:22,222 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 19:43:22,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:43:22,222 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1822237672, now seen corresponding path program 11 times [2022-01-31 19:43:22,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:22,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652001887] [2022-01-31 19:43:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:22,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:22,224 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:22,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:22,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:22,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:22,316 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 19:43:22,316 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:22,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652001887] [2022-01-31 19:43:22,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [652001887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:22,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:22,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:43:22,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110337708] [2022-01-31 19:43:22,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:22,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:43:22,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:43:22,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:43:22,318 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 19:43:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:22,561 INFO L93 Difference]: Finished difference Result 194 states and 216 transitions. [2022-01-31 19:43:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:43:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 102 [2022-01-31 19:43:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:22,562 INFO L225 Difference]: With dead ends: 194 [2022-01-31 19:43:22,562 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 19:43:22,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:43:22,563 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 269 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:22,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 49 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:43:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 19:43:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-01-31 19:43:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 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 19:43:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2022-01-31 19:43:22,579 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 102 [2022-01-31 19:43:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:22,579 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2022-01-31 19:43:22,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 19:43:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2022-01-31 19:43:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 19:43:22,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:22,581 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 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 19:43:22,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:43:22,581 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:22,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1899576872, now seen corresponding path program 12 times [2022-01-31 19:43:22,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:22,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617755401] [2022-01-31 19:43:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:22,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:22,584 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:22,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:22,586 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:30,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:30,031 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 19:43:30,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:30,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617755401] [2022-01-31 19:43:30,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [617755401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:30,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:30,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 19:43:30,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268049895] [2022-01-31 19:43:30,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:30,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 19:43:30,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:30,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 19:43:30,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=8867, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 19:43:30,034 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 95 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 19:43:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:49,505 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2022-01-31 19:43:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 19:43:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 95 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 19:43:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:49,506 INFO L225 Difference]: With dead ends: 305 [2022-01-31 19:43:49,506 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 19:43:49,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8124 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=2393, Invalid=34279, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 19:43:49,510 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 99 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 10261 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 10991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 10261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:49,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 527 Invalid, 10991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 10261 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-01-31 19:43:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 19:43:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 234. [2022-01-31 19:43:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0873362445414847) internal successors, (249), 229 states have internal predecessors, (249), 3 states have call successors, (3), 3 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 19:43:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 253 transitions. [2022-01-31 19:43:49,575 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 253 transitions. Word has length 118 [2022-01-31 19:43:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:49,576 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 253 transitions. [2022-01-31 19:43:49,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.175257731958763) internal successors, (114), 95 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 19:43:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 253 transitions. [2022-01-31 19:43:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:43:49,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:49,577 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 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 19:43:49,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:43:49,577 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash 851515126, now seen corresponding path program 13 times [2022-01-31 19:43:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487787992] [2022-01-31 19:43:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:49,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:49,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:49,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:49,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:49,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:43:49,683 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:49,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487787992] [2022-01-31 19:43:49,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1487787992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:49,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:49,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:43:49,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471775894] [2022-01-31 19:43:49,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:49,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:43:49,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:49,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:43:49,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:43:49,684 INFO L87 Difference]: Start difference. First operand 234 states and 253 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 19:43:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:50,113 INFO L93 Difference]: Finished difference Result 362 states and 390 transitions. [2022-01-31 19:43:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:43:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 120 [2022-01-31 19:43:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:50,114 INFO L225 Difference]: With dead ends: 362 [2022-01-31 19:43:50,114 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 19:43:50,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:43:50,115 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:50,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 109 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:43:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 19:43:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-01-31 19:43:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0775862068965518) internal successors, (125), 116 states have internal predecessors, (125), 3 states have call successors, (3), 3 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 19:43:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2022-01-31 19:43:50,146 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 120 [2022-01-31 19:43:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:50,146 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2022-01-31 19:43:50,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 19:43:50,146 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2022-01-31 19:43:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:43:50,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:50,147 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 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 19:43:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:43:50,147 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 41162998, now seen corresponding path program 14 times [2022-01-31 19:43:50,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:50,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232110642] [2022-01-31 19:43:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:50,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:50,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:50,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:50,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:50,271 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 19:43:50,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232110642] [2022-01-31 19:43:50,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1232110642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:50,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:50,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:43:50,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257301890] [2022-01-31 19:43:50,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:50,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:43:50,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:43:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:43:50,273 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 19:43:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:50,575 INFO L93 Difference]: Finished difference Result 226 states and 248 transitions. [2022-01-31 19:43:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:43:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 120 [2022-01-31 19:43:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:50,576 INFO L225 Difference]: With dead ends: 226 [2022-01-31 19:43:50,576 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 19:43:50,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:43:50,577 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 280 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:50,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 73 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:43:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 19:43:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-01-31 19:43:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0681818181818181) internal successors, (141), 132 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 19:43:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2022-01-31 19:43:50,608 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 120 [2022-01-31 19:43:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:50,609 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2022-01-31 19:43:50,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 19:43:50,609 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2022-01-31 19:43:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 19:43:50,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:50,610 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 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 19:43:50,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:43:50,610 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1741462246, now seen corresponding path program 15 times [2022-01-31 19:43:50,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:50,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271297619] [2022-01-31 19:43:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:50,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:50,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:50,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:50,613 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:02,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:02,121 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 19:44:02,122 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271297619] [2022-01-31 19:44:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271297619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:02,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:02,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 19:44:02,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891180087] [2022-01-31 19:44:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:02,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 19:44:02,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 19:44:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=12213, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 19:44:02,124 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 114 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 112 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 19:44:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:17,533 INFO L93 Difference]: Finished difference Result 282 states and 300 transitions. [2022-01-31 19:44:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 19:44:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 112 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 19:44:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:17,535 INFO L225 Difference]: With dead ends: 282 [2022-01-31 19:44:17,535 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 19:44:17,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6479 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1621, Invalid=32051, Unknown=0, NotChecked=0, Total=33672 [2022-01-31 19:44:17,537 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 10299 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 10720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 10299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:17,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 631 Invalid, 10720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 10299 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-01-31 19:44:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 19:44:17,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 226. [2022-01-31 19:44:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0723981900452488) internal successors, (237), 221 states have internal predecessors, (237), 3 states have call successors, (3), 3 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 19:44:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 241 transitions. [2022-01-31 19:44:17,617 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 241 transitions. Word has length 136 [2022-01-31 19:44:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:17,617 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 241 transitions. [2022-01-31 19:44:17,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 112 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 19:44:17,618 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 241 transitions. [2022-01-31 19:44:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 19:44:17,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:17,618 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 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 19:44:17,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:44:17,619 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:17,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1399515644, now seen corresponding path program 16 times [2022-01-31 19:44:17,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:17,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387080779] [2022-01-31 19:44:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:17,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:17,620 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:17,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:17,621 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:17,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:17,740 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 19:44:17,740 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:17,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387080779] [2022-01-31 19:44:17,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387080779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:17,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:17,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:44:17,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163825573] [2022-01-31 19:44:17,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:17,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:44:17,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:44:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:44:17,741 INFO L87 Difference]: Start difference. First operand 226 states and 241 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:44:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:18,231 INFO L93 Difference]: Finished difference Result 446 states and 476 transitions. [2022-01-31 19:44:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:44:18,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 138 [2022-01-31 19:44:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:18,232 INFO L225 Difference]: With dead ends: 446 [2022-01-31 19:44:18,232 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 19:44:18,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:44:18,233 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 128 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:18,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 96 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:44:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 19:44:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-01-31 19:44:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0717488789237668) internal successors, (239), 223 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 243 transitions. [2022-01-31 19:44:18,313 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 243 transitions. Word has length 138 [2022-01-31 19:44:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:18,313 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 243 transitions. [2022-01-31 19:44:18,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:44:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 243 transitions. [2022-01-31 19:44:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:44:18,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:18,314 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 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 19:44:18,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:44:18,315 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash -48385502, now seen corresponding path program 17 times [2022-01-31 19:44:18,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:18,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217812757] [2022-01-31 19:44:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:18,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:18,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:18,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:18,317 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:18,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:18,456 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 19:44:18,456 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217812757] [2022-01-31 19:44:18,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217812757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:18,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:18,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:44:18,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749220267] [2022-01-31 19:44:18,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:18,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:44:18,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:44:18,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:44:18,457 INFO L87 Difference]: Start difference. First operand 228 states and 243 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:44:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:18,809 INFO L93 Difference]: Finished difference Result 333 states and 361 transitions. [2022-01-31 19:44:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:44:18,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 140 [2022-01-31 19:44:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:18,810 INFO L225 Difference]: With dead ends: 333 [2022-01-31 19:44:18,810 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 19:44:18,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:44:18,811 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 252 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:18,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 69 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:44:18,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 19:44:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-01-31 19:44:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.06) internal successors, (159), 150 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 19:44:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2022-01-31 19:44:18,862 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 140 [2022-01-31 19:44:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:18,862 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2022-01-31 19:44:18,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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 19:44:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2022-01-31 19:44:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:44:18,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:18,863 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 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 19:44:18,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:44:18,863 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:18,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1206914164, now seen corresponding path program 18 times [2022-01-31 19:44:18,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:18,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805022105] [2022-01-31 19:44:18,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:18,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:18,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:18,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:18,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:44:33,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805022105] [2022-01-31 19:44:33,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [805022105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:33,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:33,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 19:44:33,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542807156] [2022-01-31 19:44:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 19:44:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 19:44:33,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=16474, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 19:44:33,605 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 132 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 130 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 19:44:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:50,640 INFO L93 Difference]: Finished difference Result 281 states and 296 transitions. [2022-01-31 19:44:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 19:44:50,640 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 130 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 19:44:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:50,641 INFO L225 Difference]: With dead ends: 281 [2022-01-31 19:44:50,641 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 19:44:50,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6848 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=2308, Invalid=39104, Unknown=0, NotChecked=0, Total=41412 [2022-01-31 19:44:50,644 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 10737 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 11153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 10737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:50,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 519 Invalid, 11153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 10737 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-31 19:44:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 19:44:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 256. [2022-01-31 19:44:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0637450199203187) internal successors, (267), 251 states have internal predecessors, (267), 3 states have call successors, (3), 3 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 19:44:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 271 transitions. [2022-01-31 19:44:50,754 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 271 transitions. Word has length 154 [2022-01-31 19:44:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:50,754 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 271 transitions. [2022-01-31 19:44:50,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.1363636363636365) internal successors, (150), 130 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 19:44:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 271 transitions. [2022-01-31 19:44:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:44:50,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:50,755 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 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 19:44:50,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:44:50,755 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1197607954, now seen corresponding path program 19 times [2022-01-31 19:44:50,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809910327] [2022-01-31 19:44:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:50,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:50,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:50,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:50,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:50,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:50,912 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 19:44:50,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:50,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809910327] [2022-01-31 19:44:50,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809910327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:50,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:50,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:44:50,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856231087] [2022-01-31 19:44:50,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:50,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:44:50,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:44:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:44:50,913 INFO L87 Difference]: Start difference. First operand 256 states and 271 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 19:44:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:51,571 INFO L93 Difference]: Finished difference Result 506 states and 536 transitions. [2022-01-31 19:44:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:44:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 156 [2022-01-31 19:44:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:51,572 INFO L225 Difference]: With dead ends: 506 [2022-01-31 19:44:51,572 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 19:44:51,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:44:51,573 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:51,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 116 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:44:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 19:44:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-01-31 19:44:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.0632411067193677) internal successors, (269), 253 states have internal predecessors, (269), 3 states have call successors, (3), 3 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 19:44:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 273 transitions. [2022-01-31 19:44:51,679 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 273 transitions. Word has length 156 [2022-01-31 19:44:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:51,679 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 273 transitions. [2022-01-31 19:44:51,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 19:44:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 273 transitions. [2022-01-31 19:44:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 19:44:51,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:51,680 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 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 19:44:51,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:44:51,680 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1936923824, now seen corresponding path program 20 times [2022-01-31 19:44:51,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:51,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266229961] [2022-01-31 19:44:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:51,682 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:51,682 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:51,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:51,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:51,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:51,840 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 19:44:51,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:51,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266229961] [2022-01-31 19:44:51,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [266229961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:51,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:51,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:44:51,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727012414] [2022-01-31 19:44:51,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:51,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:44:51,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:44:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:44:51,842 INFO L87 Difference]: Start difference. First operand 258 states and 273 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 19:44:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:52,249 INFO L93 Difference]: Finished difference Result 375 states and 403 transitions. [2022-01-31 19:44:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:44:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 158 [2022-01-31 19:44:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:52,250 INFO L225 Difference]: With dead ends: 375 [2022-01-31 19:44:52,250 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 19:44:52,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:44:52,251 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 372 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:52,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 65 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:44:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 19:44:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-01-31 19:44:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0535714285714286) internal successors, (177), 168 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 19:44:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 181 transitions. [2022-01-31 19:44:52,324 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 181 transitions. Word has length 158 [2022-01-31 19:44:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:52,324 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 181 transitions. [2022-01-31 19:44:52,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 19:44:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 181 transitions. [2022-01-31 19:44:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:44:52,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:52,325 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 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 19:44:52,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:44:52,325 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash -644090238, now seen corresponding path program 21 times [2022-01-31 19:44:52,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:52,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135961510] [2022-01-31 19:44:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:52,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:52,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:52,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:52,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:07,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:07,970 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 19:45:07,970 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:07,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135961510] [2022-01-31 19:45:07,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2135961510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:07,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:07,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 19:45:07,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199638470] [2022-01-31 19:45:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:07,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 19:45:07,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 19:45:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=21208, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 19:45:07,973 INFO L87 Difference]: Start difference. First operand 173 states and 181 transitions. Second operand has 150 states, 150 states have (on average 1.12) internal successors, (168), 148 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 19:45:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:44,558 INFO L93 Difference]: Finished difference Result 463 states and 487 transitions. [2022-01-31 19:45:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-01-31 19:45:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.12) internal successors, (168), 148 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 19:45:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:44,560 INFO L225 Difference]: With dead ends: 463 [2022-01-31 19:45:44,560 INFO L226 Difference]: Without dead ends: 457 [2022-01-31 19:45:44,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21142 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=4555, Invalid=75251, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 19:45:44,563 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 24848 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 25963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1115 IncrementalHoareTripleChecker+Valid, 24848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:44,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 825 Invalid, 25963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1115 Valid, 24848 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-01-31 19:45:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-01-31 19:45:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 360. [2022-01-31 19:45:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.0591549295774647) internal successors, (376), 355 states have internal predecessors, (376), 3 states have call successors, (3), 3 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 19:45:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 380 transitions. [2022-01-31 19:45:44,754 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 380 transitions. Word has length 172 [2022-01-31 19:45:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:44,754 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 380 transitions. [2022-01-31 19:45:44,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.12) internal successors, (168), 148 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 19:45:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 380 transitions. [2022-01-31 19:45:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:45:44,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:44,755 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 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 19:45:44,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:45:44,755 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash 488360224, now seen corresponding path program 22 times [2022-01-31 19:45:44,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:44,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053069037] [2022-01-31 19:45:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:44,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:44,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:44,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:44,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:44,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:44,940 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 19:45:44,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053069037] [2022-01-31 19:45:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053069037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:44,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:44,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:45:44,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441987034] [2022-01-31 19:45:44,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:44,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:45:44,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:44,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:45:44,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:45:44,942 INFO L87 Difference]: Start difference. First operand 360 states and 380 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:45:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:45,778 INFO L93 Difference]: Finished difference Result 530 states and 558 transitions. [2022-01-31 19:45:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:45:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 174 [2022-01-31 19:45:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:45,780 INFO L225 Difference]: With dead ends: 530 [2022-01-31 19:45:45,780 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 19:45:45,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:45:45,781 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:45,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 135 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:45:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 19:45:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-01-31 19:45:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0529411764705883) internal successors, (179), 170 states have internal predecessors, (179), 3 states have call successors, (3), 3 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 19:45:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 183 transitions. [2022-01-31 19:45:45,852 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 183 transitions. Word has length 174 [2022-01-31 19:45:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:45,852 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 183 transitions. [2022-01-31 19:45:45,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:45:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 183 transitions. [2022-01-31 19:45:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:45:45,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:45,853 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 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 19:45:45,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:45:45,853 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash 711199520, now seen corresponding path program 23 times [2022-01-31 19:45:45,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:45,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339545121] [2022-01-31 19:45:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:45,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:45,854 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:45,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:45,855 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:46,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:46,028 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339545121] [2022-01-31 19:45:46,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [339545121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:46,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:46,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:45:46,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419848061] [2022-01-31 19:45:46,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:46,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:45:46,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:45:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:45:46,029 INFO L87 Difference]: Start difference. First operand 175 states and 183 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:45:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:46,545 INFO L93 Difference]: Finished difference Result 322 states and 344 transitions. [2022-01-31 19:45:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:45:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 174 [2022-01-31 19:45:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:46,546 INFO L225 Difference]: With dead ends: 322 [2022-01-31 19:45:46,547 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 19:45:46,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:45:46,547 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 515 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:46,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 59 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:45:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 19:45:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 19:45:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0483870967741935) internal successors, (195), 186 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 199 transitions. [2022-01-31 19:45:46,641 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 199 transitions. Word has length 174 [2022-01-31 19:45:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:46,641 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 199 transitions. [2022-01-31 19:45:46,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:45:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 199 transitions. [2022-01-31 19:45:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:45:46,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:46,642 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 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 19:45:46,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:45:46,642 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1245919504, now seen corresponding path program 24 times [2022-01-31 19:45:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:46,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509765855] [2022-01-31 19:45:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:46,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:46,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:46,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:46,645 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:09,123 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 19:46:09,123 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509765855] [2022-01-31 19:46:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [509765855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:09,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:09,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-01-31 19:46:09,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28583116] [2022-01-31 19:46:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:09,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 19:46:09,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 19:46:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=25974, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 19:46:09,126 INFO L87 Difference]: Start difference. First operand 191 states and 199 transitions. Second operand has 165 states, 165 states have (on average 1.1272727272727272) internal successors, (186), 163 states have internal predecessors, (186), 2 states have call successors, (3), 3 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 19:47:08,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-31 19:47:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:40,879 INFO L93 Difference]: Finished difference Result 565 states and 598 transitions. [2022-01-31 19:47:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 310 states. [2022-01-31 19:47:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.1272727272727272) internal successors, (186), 163 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 19:47:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:40,883 INFO L225 Difference]: With dead ends: 565 [2022-01-31 19:47:40,883 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 19:47:40,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42945 ImplicationChecksByTransitivity, 78.6s TimeCoverageRelationStatistics Valid=8452, Invalid=143258, Unknown=0, NotChecked=0, Total=151710 [2022-01-31 19:47:40,889 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 192 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 35711 mSolverCounterSat, 2055 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 37767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2055 IncrementalHoareTripleChecker+Valid, 35711 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:40,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 856 Invalid, 37767 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2055 Valid, 35711 Invalid, 1 Unknown, 0 Unchecked, 28.1s Time] [2022-01-31 19:47:40,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 19:47:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 318. [2022-01-31 19:47:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.0543130990415335) internal successors, (330), 313 states have internal predecessors, (330), 3 states have call successors, (3), 3 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 19:47:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 334 transitions. [2022-01-31 19:47:41,136 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 334 transitions. Word has length 190 [2022-01-31 19:47:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:41,153 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 334 transitions. [2022-01-31 19:47:41,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.1272727272727272) internal successors, (186), 163 states have internal predecessors, (186), 2 states have call successors, (3), 3 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 19:47:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 334 transitions. [2022-01-31 19:47:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 19:47:41,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:41,155 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 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 19:47:41,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:47:41,155 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash 16556078, now seen corresponding path program 25 times [2022-01-31 19:47:41,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132560991] [2022-01-31 19:47:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:41,158 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:41,158 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:41,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:41,159 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:41,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:41,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132560991] [2022-01-31 19:47:41,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [132560991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:41,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:41,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:47:41,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712730162] [2022-01-31 19:47:41,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:41,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:47:41,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:47:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:47:41,394 INFO L87 Difference]: Start difference. First operand 318 states and 334 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:47:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:42,602 INFO L93 Difference]: Finished difference Result 735 states and 773 transitions. [2022-01-31 19:47:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:47:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 192 [2022-01-31 19:47:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:42,608 INFO L225 Difference]: With dead ends: 735 [2022-01-31 19:47:42,608 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 19:47:42,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:47:42,609 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:42,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 146 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:47:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 19:47:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2022-01-31 19:47:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.053968253968254) internal successors, (332), 315 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 336 transitions. [2022-01-31 19:47:42,849 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 336 transitions. Word has length 192 [2022-01-31 19:47:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:42,849 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 336 transitions. [2022-01-31 19:47:42,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:47:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 336 transitions. [2022-01-31 19:47:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 19:47:42,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:42,850 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 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 19:47:42,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:47:42,851 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -681952820, now seen corresponding path program 26 times [2022-01-31 19:47:42,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027966210] [2022-01-31 19:47:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:42,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:42,852 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:42,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:42,853 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:43,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:43,091 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 19:47:43,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027966210] [2022-01-31 19:47:43,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027966210] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:43,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:43,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:47:43,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695432572] [2022-01-31 19:47:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:43,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:47:43,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:43,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:47:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:47:43,093 INFO L87 Difference]: Start difference. First operand 320 states and 336 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:47:43,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:43,828 INFO L93 Difference]: Finished difference Result 459 states and 487 transitions. [2022-01-31 19:47:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:47:43,828 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 194 [2022-01-31 19:47:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:43,829 INFO L225 Difference]: With dead ends: 459 [2022-01-31 19:47:43,829 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 19:47:43,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=373, Invalid=887, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:47:43,830 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 765 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:43,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 69 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:43,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 19:47:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-01-31 19:47:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0441176470588236) internal successors, (213), 204 states have internal predecessors, (213), 3 states have call successors, (3), 3 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 19:47:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 217 transitions. [2022-01-31 19:47:43,991 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 217 transitions. Word has length 194 [2022-01-31 19:47:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:43,991 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 217 transitions. [2022-01-31 19:47:43,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 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 19:47:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 217 transitions. [2022-01-31 19:47:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 19:47:43,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:43,992 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 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 19:47:43,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:47:43,992 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1738492898, now seen corresponding path program 27 times [2022-01-31 19:47:43,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:43,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942329360] [2022-01-31 19:47:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:43,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:43,994 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:43,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:43,994 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:21,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:48:21,235 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942329360] [2022-01-31 19:48:21,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1942329360] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:21,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:21,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-01-31 19:48:21,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964375693] [2022-01-31 19:48:21,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-01-31 19:48:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-01-31 19:48:21,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1418, Invalid=31524, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 19:48:21,238 INFO L87 Difference]: Start difference. First operand 209 states and 217 transitions. Second operand has 182 states, 182 states have (on average 1.120879120879121) internal successors, (204), 180 states have internal predecessors, (204), 2 states have call successors, (3), 3 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 19:51:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:02,752 INFO L93 Difference]: Finished difference Result 767 states and 804 transitions. [2022-01-31 19:51:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 364 states. [2022-01-31 19:51:02,752 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.120879120879121) internal successors, (204), 180 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-01-31 19:51:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:02,754 INFO L225 Difference]: With dead ends: 767 [2022-01-31 19:51:02,754 INFO L226 Difference]: Without dead ends: 760 [2022-01-31 19:51:02,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58178 ImplicationChecksByTransitivity, 139.5s TimeCoverageRelationStatistics Valid=12972, Invalid=200934, Unknown=0, NotChecked=0, Total=213906 [2022-01-31 19:51:02,767 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 220 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 52815 mSolverCounterSat, 2616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 55431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2616 IncrementalHoareTripleChecker+Valid, 52815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:02,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 953 Invalid, 55431 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2616 Valid, 52815 Invalid, 0 Unknown, 0 Unchecked, 48.9s Time] [2022-01-31 19:51:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-31 19:51:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 460. [2022-01-31 19:51:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.0505494505494506) internal successors, (478), 455 states have internal predecessors, (478), 3 states have call successors, (3), 3 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 19:51:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 482 transitions. [2022-01-31 19:51:03,309 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 482 transitions. Word has length 208 [2022-01-31 19:51:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:03,309 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 482 transitions. [2022-01-31 19:51:03,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.120879120879121) internal successors, (204), 180 states have internal predecessors, (204), 2 states have call successors, (3), 3 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 19:51:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 482 transitions. [2022-01-31 19:51:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:51:03,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:03,310 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 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 19:51:03,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:51:03,311 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1034391484, now seen corresponding path program 28 times [2022-01-31 19:51:03,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:03,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471107890] [2022-01-31 19:51:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:03,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:03,312 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:03,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:03,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:03,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:03,576 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 19:51:03,576 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:03,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471107890] [2022-01-31 19:51:03,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471107890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:03,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:03,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:51:03,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260681761] [2022-01-31 19:51:03,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:03,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:51:03,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:03,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:51:03,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:51:03,577 INFO L87 Difference]: Start difference. First operand 460 states and 482 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:51:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:04,689 INFO L93 Difference]: Finished difference Result 688 states and 719 transitions. [2022-01-31 19:51:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:51:04,689 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 210 [2022-01-31 19:51:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:04,690 INFO L225 Difference]: With dead ends: 688 [2022-01-31 19:51:04,690 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 19:51:04,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:51:04,692 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:04,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 97 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:51:04,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 19:51:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-01-31 19:51:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0436893203883495) internal successors, (215), 206 states have internal predecessors, (215), 3 states have call successors, (3), 3 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 19:51:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 219 transitions. [2022-01-31 19:51:04,912 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 219 transitions. Word has length 210 [2022-01-31 19:51:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:04,912 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 219 transitions. [2022-01-31 19:51:04,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:51:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 219 transitions. [2022-01-31 19:51:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:51:04,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:04,914 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 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 19:51:04,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:51:04,914 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1665356220, now seen corresponding path program 29 times [2022-01-31 19:51:04,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:04,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929423190] [2022-01-31 19:51:04,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:04,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:04,916 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:04,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:04,918 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:05,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:05,200 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 19:51:05,200 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:05,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929423190] [2022-01-31 19:51:05,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929423190] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:05,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:05,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:51:05,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977820546] [2022-01-31 19:51:05,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:05,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:51:05,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:51:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:51:05,201 INFO L87 Difference]: Start difference. First operand 211 states and 219 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:51:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:06,051 INFO L93 Difference]: Finished difference Result 386 states and 408 transitions. [2022-01-31 19:51:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:51:06,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 210 [2022-01-31 19:51:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:06,052 INFO L225 Difference]: With dead ends: 386 [2022-01-31 19:51:06,052 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 19:51:06,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:51:06,053 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 814 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 668 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:06,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 69 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [668 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:51:06,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 19:51:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-01-31 19:51:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0405405405405406) internal successors, (231), 222 states have internal predecessors, (231), 3 states have call successors, (3), 3 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 19:51:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 235 transitions. [2022-01-31 19:51:06,276 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 235 transitions. Word has length 210 [2022-01-31 19:51:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:06,276 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 235 transitions. [2022-01-31 19:51:06,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 25 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 19:51:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 235 transitions. [2022-01-31 19:51:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 19:51:06,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:06,277 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 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 19:51:06,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:51:06,277 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:06,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1635207084, now seen corresponding path program 30 times [2022-01-31 19:51:06,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:06,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390648226] [2022-01-31 19:51:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:06,279 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:06,279 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:06,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:06,280 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:45,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:51:45,903 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390648226] [2022-01-31 19:51:45,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [390648226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:45,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:45,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [199] imperfect sequences [] total 199 [2022-01-31 19:51:45,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450721694] [2022-01-31 19:51:45,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:45,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2022-01-31 19:51:45,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:45,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2022-01-31 19:51:45,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1734, Invalid=37668, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 19:51:45,907 INFO L87 Difference]: Start difference. First operand 227 states and 235 transitions. Second operand has 199 states, 199 states have (on average 1.1155778894472361) internal successors, (222), 197 states have internal predecessors, (222), 2 states have call successors, (3), 3 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 19:54:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:22,789 INFO L93 Difference]: Finished difference Result 662 states and 694 transitions. [2022-01-31 19:54:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 371 states. [2022-01-31 19:54:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 1.1155778894472361) internal successors, (222), 197 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-01-31 19:54:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:22,791 INFO L225 Difference]: With dead ends: 662 [2022-01-31 19:54:22,791 INFO L226 Difference]: Without dead ends: 656 [2022-01-31 19:54:22,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 469 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65496 ImplicationChecksByTransitivity, 140.4s TimeCoverageRelationStatistics Valid=12309, Invalid=209061, Unknown=0, NotChecked=0, Total=221370 [2022-01-31 19:54:22,799 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 193 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 46297 mSolverCounterSat, 2466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 48763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2466 IncrementalHoareTripleChecker+Valid, 46297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:22,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 853 Invalid, 48763 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2466 Valid, 46297 Invalid, 0 Unknown, 0 Unchecked, 44.8s Time] [2022-01-31 19:54:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-31 19:54:23,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 378. [2022-01-31 19:54:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 373 states have (on average 1.0455764075067024) internal successors, (390), 373 states have internal predecessors, (390), 3 states have call successors, (3), 3 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 19:54:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 394 transitions. [2022-01-31 19:54:23,333 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 394 transitions. Word has length 226 [2022-01-31 19:54:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:23,333 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 394 transitions. [2022-01-31 19:54:23,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 1.1155778894472361) internal successors, (222), 197 states have internal predecessors, (222), 2 states have call successors, (3), 3 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 19:54:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 394 transitions. [2022-01-31 19:54:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 19:54:23,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:23,334 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 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 19:54:23,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:54:23,334 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash 459765706, now seen corresponding path program 31 times [2022-01-31 19:54:23,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:23,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042220421] [2022-01-31 19:54:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:23,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:23,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:23,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:23,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:23,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:54:23,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:23,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042220421] [2022-01-31 19:54:23,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042220421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:23,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:23,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:54:23,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781776486] [2022-01-31 19:54:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:23,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:54:23,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:23,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:54:23,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:54:23,629 INFO L87 Difference]: Start difference. First operand 378 states and 394 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 19:54:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:25,376 INFO L93 Difference]: Finished difference Result 875 states and 913 transitions. [2022-01-31 19:54:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:54:25,376 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 228 [2022-01-31 19:54:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:25,377 INFO L225 Difference]: With dead ends: 875 [2022-01-31 19:54:25,377 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 19:54:25,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:54:25,379 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:25,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 110 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:54:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 19:54:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 380. [2022-01-31 19:54:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.0453333333333332) internal successors, (392), 375 states have internal predecessors, (392), 3 states have call successors, (3), 3 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 19:54:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 396 transitions. [2022-01-31 19:54:25,888 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 396 transitions. Word has length 228 [2022-01-31 19:54:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 396 transitions. [2022-01-31 19:54:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 19:54:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 396 transitions. [2022-01-31 19:54:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:54:25,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:25,890 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 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 19:54:25,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:54:25,890 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash 910236264, now seen corresponding path program 32 times [2022-01-31 19:54:25,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:25,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823113628] [2022-01-31 19:54:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:25,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:25,891 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:25,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:25,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:26,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:26,176 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 19:54:26,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:26,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823113628] [2022-01-31 19:54:26,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823113628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:26,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:26,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:54:26,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853106510] [2022-01-31 19:54:26,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:26,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:54:26,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:26,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:54:26,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:54:26,177 INFO L87 Difference]: Start difference. First operand 380 states and 396 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 19:54:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:27,152 INFO L93 Difference]: Finished difference Result 543 states and 571 transitions. [2022-01-31 19:54:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:54:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 230 [2022-01-31 19:54:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:27,153 INFO L225 Difference]: With dead ends: 543 [2022-01-31 19:54:27,153 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 19:54:27,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:54:27,154 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 677 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:27,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 67 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:54:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 19:54:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-01-31 19:54:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0375) internal successors, (249), 240 states have internal predecessors, (249), 3 states have call successors, (3), 3 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 19:54:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2022-01-31 19:54:27,485 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 230 [2022-01-31 19:54:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:27,485 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2022-01-31 19:54:27,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 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 19:54:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2022-01-31 19:54:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 19:54:27,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:27,486 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 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 19:54:27,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:54:27,486 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash 806474682, now seen corresponding path program 33 times [2022-01-31 19:54:27,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:27,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262055848] [2022-01-31 19:54:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:27,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:54:27,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:54:27,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:27,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:28,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:28,589 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 19:55:28,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:28,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262055848] [2022-01-31 19:55:28,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262055848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:28,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:28,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [215] imperfect sequences [] total 215 [2022-01-31 19:55:28,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358928160] [2022-01-31 19:55:28,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:28,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2022-01-31 19:55:28,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:28,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2022-01-31 19:55:28,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1375, Invalid=44635, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 19:55:28,593 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand has 215 states, 215 states have (on average 1.1162790697674418) internal successors, (240), 213 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)