/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-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:23:59,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:23:59,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:23:59,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:23:59,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:23:59,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:23:59,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:23:59,560 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 18:23:59,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:23:59,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:23:59,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:23:59,571 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:23:59,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:23:59,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:23:59,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:23:59,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:23:59,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:23:59,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:23:59,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:23:59,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:23:59,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:23:59,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:23:59,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:23:59,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:23:59,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:23:59,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:23:59,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:23:59,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:23:59,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:23:59,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:23:59,573 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:23:59,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:23:59,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:23:59,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:23:59,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:23:59,753 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:23:59,753 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:23:59,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2022-01-31 18:23:59,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7bf69ddd/d888b2f5388742118bcca018015bed3b/FLAG6fab5be1b [2022-01-31 18:24:00,145 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:24:00,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2022-01-31 18:24:00,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7bf69ddd/d888b2f5388742118bcca018015bed3b/FLAG6fab5be1b [2022-01-31 18:24:00,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7bf69ddd/d888b2f5388742118bcca018015bed3b [2022-01-31 18:24:00,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:24:00,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:24:00,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:24:00,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:24:00,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:24:00,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7455e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00, skipping insertion in model container [2022-01-31 18:24:00,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:24:00,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:24:00,309 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-industry-pattern/array_single_elem_init.i[815,828] [2022-01-31 18:24:00,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:24:00,324 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:24:00,331 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-industry-pattern/array_single_elem_init.i[815,828] [2022-01-31 18:24:00,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:24:00,345 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:24:00,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00 WrapperNode [2022-01-31 18:24:00,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:24:00,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:24:00,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:24:00,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:24:00,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:24:00,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:24:00,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:24:00,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:24:00,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (1/1) ... [2022-01-31 18:24:00,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:24:00,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:24:00,387 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 18:24:00,392 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 18:24:00,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:24:00,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:24:00,409 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:24:00,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:24:00,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:24:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:24:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:24:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:24:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:24:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:24:00,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:24:00,486 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:24:00,488 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:24:00,649 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:24:00,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:24:00,654 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 18:24:00,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:24:00 BoogieIcfgContainer [2022-01-31 18:24:00,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:24:00,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:24:00,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:24:00,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:24:00,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:24:00" (1/3) ... [2022-01-31 18:24:00,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69872760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:24:00, skipping insertion in model container [2022-01-31 18:24:00,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:00" (2/3) ... [2022-01-31 18:24:00,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69872760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:24:00, skipping insertion in model container [2022-01-31 18:24:00,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:24:00" (3/3) ... [2022-01-31 18:24:00,661 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2022-01-31 18:24:00,664 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:24:00,665 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:24:00,701 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:24:00,710 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 18:24:00,710 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:24:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 18:24:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:24:00,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:00,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:00,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1729551954, now seen corresponding path program 1 times [2022-01-31 18:24:00,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:00,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92832943] [2022-01-31 18:24:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:00,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:00,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:00,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:00,931 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 18:24:00,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92832943] [2022-01-31 18:24:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [92832943] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:00,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:00,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:24:00,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823185143] [2022-01-31 18:24:00,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:00,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:24:00,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:00,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:24:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:24:00,962 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:00,988 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-01-31 18:24:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:24:00,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 18:24:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:00,993 INFO L225 Difference]: With dead ends: 46 [2022-01-31 18:24:00,993 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 18:24:00,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:24:00,997 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:00,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:24:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 18:24:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 18:24:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-31 18:24:01,020 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2022-01-31 18:24:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:01,020 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-31 18:24:01,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-31 18:24:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 18:24:01,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:01,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:01,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:24:01,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1443190422, now seen corresponding path program 1 times [2022-01-31 18:24:01,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:01,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777254383] [2022-01-31 18:24:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:01,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:01,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,086 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 18:24:01,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777254383] [2022-01-31 18:24:01,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777254383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:01,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:01,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:24:01,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078241644] [2022-01-31 18:24:01,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:01,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:24:01,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:24:01,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:24:01,088 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:01,158 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-01-31 18:24:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 18:24:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 18:24:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:01,160 INFO L225 Difference]: With dead ends: 45 [2022-01-31 18:24:01,160 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 18:24:01,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:24:01,161 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:01,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 18:24:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-01-31 18:24:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-31 18:24:01,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2022-01-31 18:24:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:01,168 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-31 18:24:01,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-31 18:24:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 18:24:01,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:01,169 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:01,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:24:01,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 749519378, now seen corresponding path program 1 times [2022-01-31 18:24:01,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:01,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775282651] [2022-01-31 18:24:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:01,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:01,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:01,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:01,186 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,278 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 18:24:01,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:01,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775282651] [2022-01-31 18:24:01,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [775282651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:01,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:01,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:24:01,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660219132] [2022-01-31 18:24:01,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:01,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:24:01,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:01,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:24:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:24:01,281 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:01,427 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-01-31 18:24:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:24:01,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 18:24:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:01,429 INFO L225 Difference]: With dead ends: 56 [2022-01-31 18:24:01,429 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 18:24:01,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:24:01,435 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:01,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 25 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 18:24:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-01-31 18:24:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-01-31 18:24:01,441 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2022-01-31 18:24:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:01,441 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-01-31 18:24:01,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-01-31 18:24:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 18:24:01,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:01,442 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:01,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:24:01,442 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:01,443 INFO L85 PathProgramCache]: Analyzing trace with hash -9027222, now seen corresponding path program 2 times [2022-01-31 18:24:01,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:01,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346266726] [2022-01-31 18:24:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:01,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:01,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:01,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:01,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,523 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 18:24:01,524 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:01,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346266726] [2022-01-31 18:24:01,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [346266726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:01,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:01,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:24:01,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939285105] [2022-01-31 18:24:01,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:01,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:24:01,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:01,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:24:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:24:01,526 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:01,629 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-01-31 18:24:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:24:01,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 18:24:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:01,632 INFO L225 Difference]: With dead ends: 68 [2022-01-31 18:24:01,633 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 18:24:01,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:24:01,640 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:01,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 18:24:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-01-31 18:24:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-01-31 18:24:01,664 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 30 [2022-01-31 18:24:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:01,664 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-01-31 18:24:01,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-01-31 18:24:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 18:24:01,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:01,665 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:01,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:24:01,666 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:01,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2083363858, now seen corresponding path program 3 times [2022-01-31 18:24:01,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:01,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331958820] [2022-01-31 18:24:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:01,671 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:01,671 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:01,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:01,672 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:01,757 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 18:24:01,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:01,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331958820] [2022-01-31 18:24:01,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [331958820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:01,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:01,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:24:01,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995334930] [2022-01-31 18:24:01,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:01,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:24:01,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:24:01,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:24:01,761 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 18:24:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:01,900 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-01-31 18:24:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:24:01,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 38 [2022-01-31 18:24:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:01,905 INFO L225 Difference]: With dead ends: 80 [2022-01-31 18:24:01,905 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 18:24:01,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:24:01,910 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:01,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 30 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 18:24:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-01-31 18:24:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-01-31 18:24:01,923 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 38 [2022-01-31 18:24:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:01,923 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-01-31 18:24:01,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 18:24:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-01-31 18:24:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 18:24:01,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:01,924 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:01,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:24:01,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2134940010, now seen corresponding path program 4 times [2022-01-31 18:24:01,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:01,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918283314] [2022-01-31 18:24:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:01,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:01,928 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:01,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:01,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,031 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 18:24:02,031 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:02,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918283314] [2022-01-31 18:24:02,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [918283314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:02,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:02,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:24:02,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432052834] [2022-01-31 18:24:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:02,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:24:02,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:24:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:24:02,032 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:02,159 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2022-01-31 18:24:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:24:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 18:24:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:02,160 INFO L225 Difference]: With dead ends: 92 [2022-01-31 18:24:02,160 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 18:24:02,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:24:02,160 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:02,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 35 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 18:24:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2022-01-31 18:24:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2022-01-31 18:24:02,168 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 46 [2022-01-31 18:24:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:02,168 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2022-01-31 18:24:02,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2022-01-31 18:24:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 18:24:02,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:02,169 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:02,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:24:02,169 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -322718190, now seen corresponding path program 5 times [2022-01-31 18:24:02,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:02,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879449467] [2022-01-31 18:24:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:02,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:02,173 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:02,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:02,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,290 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 18:24:02,291 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879449467] [2022-01-31 18:24:02,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [879449467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:02,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:02,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:24:02,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352043763] [2022-01-31 18:24:02,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:02,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:24:02,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:24:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:24:02,292 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:02,439 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2022-01-31 18:24:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:24:02,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 18:24:02,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:02,440 INFO L225 Difference]: With dead ends: 104 [2022-01-31 18:24:02,440 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 18:24:02,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:24:02,441 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:02,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 25 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 18:24:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-01-31 18:24:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 66 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-01-31 18:24:02,451 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 54 [2022-01-31 18:24:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:02,451 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-01-31 18:24:02,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-01-31 18:24:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 18:24:02,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:02,453 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:02,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:24:02,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:02,453 INFO L85 PathProgramCache]: Analyzing trace with hash 164213098, now seen corresponding path program 6 times [2022-01-31 18:24:02,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:02,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765326528] [2022-01-31 18:24:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:02,457 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:02,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:02,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:02,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,558 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 18:24:02,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:02,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765326528] [2022-01-31 18:24:02,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765326528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:02,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:02,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:24:02,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241091717] [2022-01-31 18:24:02,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:02,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:24:02,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:24:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:24:02,560 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:02,710 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-01-31 18:24:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:24:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 18:24:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:02,711 INFO L225 Difference]: With dead ends: 116 [2022-01-31 18:24:02,711 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 18:24:02,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:24:02,711 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 219 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:02,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 30 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 18:24:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2022-01-31 18:24:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.32) internal successors, (99), 75 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-01-31 18:24:02,719 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 62 [2022-01-31 18:24:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:02,720 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-01-31 18:24:02,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-01-31 18:24:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 18:24:02,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:02,720 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:02,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:24:02,721 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:02,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:02,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1342115858, now seen corresponding path program 7 times [2022-01-31 18:24:02,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:02,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531826623] [2022-01-31 18:24:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:02,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:02,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:02,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:02,725 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:02,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:02,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531826623] [2022-01-31 18:24:02,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [531826623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:02,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:02,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:24:02,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080498905] [2022-01-31 18:24:02,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:24:02,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:24:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:24:02,808 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:03,006 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2022-01-31 18:24:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:24:03,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 18:24:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:03,009 INFO L225 Difference]: With dead ends: 128 [2022-01-31 18:24:03,009 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 18:24:03,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:24:03,011 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 318 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:03,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 25 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 18:24:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-01-31 18:24:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 84 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2022-01-31 18:24:03,024 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 70 [2022-01-31 18:24:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:03,025 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2022-01-31 18:24:03,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2022-01-31 18:24:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 18:24:03,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:03,027 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:03,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:24:03,041 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1803651434, now seen corresponding path program 8 times [2022-01-31 18:24:03,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138933999] [2022-01-31 18:24:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:03,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:03,044 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:03,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:03,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:03,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:03,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:03,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138933999] [2022-01-31 18:24:03,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [138933999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:03,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:03,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:24:03,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149704948] [2022-01-31 18:24:03,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:03,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:24:03,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:24:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:24:03,157 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:03,381 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2022-01-31 18:24:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:24:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 18:24:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:03,382 INFO L225 Difference]: With dead ends: 140 [2022-01-31 18:24:03,382 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 18:24:03,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:24:03,383 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 345 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:03,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 25 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 18:24:03,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-01-31 18:24:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 93 states have (on average 1.3225806451612903) internal successors, (123), 93 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2022-01-31 18:24:03,392 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 78 [2022-01-31 18:24:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:03,392 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2022-01-31 18:24:03,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2022-01-31 18:24:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 18:24:03,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:03,393 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:03,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:24:03,393 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 191867410, now seen corresponding path program 9 times [2022-01-31 18:24:03,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:03,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092546995] [2022-01-31 18:24:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:03,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:03,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:03,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:03,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:03,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:03,496 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 18:24:03,496 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092546995] [2022-01-31 18:24:03,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092546995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:03,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:03,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:24:03,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908944114] [2022-01-31 18:24:03,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:03,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:24:03,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:03,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:24:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:24:03,497 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 18:24:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:03,689 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-01-31 18:24:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:24:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 86 [2022-01-31 18:24:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:03,690 INFO L225 Difference]: With dead ends: 152 [2022-01-31 18:24:03,690 INFO L226 Difference]: Without dead ends: 114 [2022-01-31 18:24:03,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:24:03,692 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 324 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:03,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 30 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-31 18:24:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-01-31 18:24:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.3235294117647058) internal successors, (135), 102 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:03,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-01-31 18:24:03,706 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 86 [2022-01-31 18:24:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:03,706 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-01-31 18:24:03,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 18:24:03,707 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-01-31 18:24:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 18:24:03,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:03,712 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:03,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:24:03,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1557668202, now seen corresponding path program 10 times [2022-01-31 18:24:03,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:03,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195049469] [2022-01-31 18:24:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:03,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:03,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:03,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:03,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:03,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:03,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195049469] [2022-01-31 18:24:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [195049469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:03,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:03,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:24:03,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462397818] [2022-01-31 18:24:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:03,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:24:03,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:24:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:24:03,847 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:04,107 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2022-01-31 18:24:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:24:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-01-31 18:24:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:04,108 INFO L225 Difference]: With dead ends: 164 [2022-01-31 18:24:04,108 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 18:24:04,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:24:04,109 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 327 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:04,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 35 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:24:04,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 18:24:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2022-01-31 18:24:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 111 states have (on average 1.3243243243243243) internal successors, (147), 111 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2022-01-31 18:24:04,121 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 94 [2022-01-31 18:24:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:04,122 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2022-01-31 18:24:04,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:04,122 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2022-01-31 18:24:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 18:24:04,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:04,122 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:04,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:24:04,123 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:04,123 INFO L85 PathProgramCache]: Analyzing trace with hash 413500434, now seen corresponding path program 11 times [2022-01-31 18:24:04,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:04,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277099580] [2022-01-31 18:24:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:04,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:04,127 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:04,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:04,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:04,253 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 18:24:04,253 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277099580] [2022-01-31 18:24:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [277099580] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:04,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:04,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:24:04,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641724826] [2022-01-31 18:24:04,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:04,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:24:04,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:24:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:24:04,254 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 18:24:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:04,523 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2022-01-31 18:24:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:24:04,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 102 [2022-01-31 18:24:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:04,524 INFO L225 Difference]: With dead ends: 176 [2022-01-31 18:24:04,524 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 18:24:04,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:24:04,525 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 346 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:04,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 40 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 18:24:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-01-31 18:24:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.325) internal successors, (159), 120 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2022-01-31 18:24:04,535 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 102 [2022-01-31 18:24:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:04,535 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2022-01-31 18:24:04,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 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 18:24:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2022-01-31 18:24:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 18:24:04,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:04,536 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:04,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:24:04,536 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2109900438, now seen corresponding path program 12 times [2022-01-31 18:24:04,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:04,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525726306] [2022-01-31 18:24:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:04,539 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:04,539 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:04,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:04,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:04,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:04,662 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 18:24:04,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:04,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525726306] [2022-01-31 18:24:04,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [525726306] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:04,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:04,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:24:04,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510692327] [2022-01-31 18:24:04,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:04,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:24:04,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:24:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:24:04,663 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:04,999 INFO L93 Difference]: Finished difference Result 188 states and 235 transitions. [2022-01-31 18:24:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:24:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 18:24:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:05,000 INFO L225 Difference]: With dead ends: 188 [2022-01-31 18:24:05,000 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 18:24:05,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:24:05,002 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 469 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:05,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 30 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:05,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 18:24:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2022-01-31 18:24:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 129 states have (on average 1.3255813953488371) internal successors, (171), 129 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2022-01-31 18:24:05,014 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 110 [2022-01-31 18:24:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:05,015 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2022-01-31 18:24:05,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2022-01-31 18:24:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 18:24:05,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:05,016 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:05,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:24:05,016 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:05,016 INFO L85 PathProgramCache]: Analyzing trace with hash 87072274, now seen corresponding path program 13 times [2022-01-31 18:24:05,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:05,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042304477] [2022-01-31 18:24:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:05,020 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:05,020 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:05,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:05,023 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:05,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:05,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:05,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042304477] [2022-01-31 18:24:05,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042304477] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:05,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:05,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:24:05,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635776576] [2022-01-31 18:24:05,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:05,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:24:05,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:05,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:24:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:24:05,204 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:05,528 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2022-01-31 18:24:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:24:05,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-01-31 18:24:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:05,529 INFO L225 Difference]: With dead ends: 200 [2022-01-31 18:24:05,529 INFO L226 Difference]: Without dead ends: 150 [2022-01-31 18:24:05,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:24:05,530 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 408 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:05,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 40 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-31 18:24:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2022-01-31 18:24:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.326086956521739) internal successors, (183), 138 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 188 transitions. [2022-01-31 18:24:05,543 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 188 transitions. Word has length 118 [2022-01-31 18:24:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:05,543 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 188 transitions. [2022-01-31 18:24:05,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 188 transitions. [2022-01-31 18:24:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 18:24:05,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:05,544 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:05,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:24:05,544 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1814139242, now seen corresponding path program 14 times [2022-01-31 18:24:05,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:05,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385751912] [2022-01-31 18:24:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:05,547 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:05,547 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:05,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:05,548 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:05,737 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 18:24:05,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:05,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385751912] [2022-01-31 18:24:05,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [385751912] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:05,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:05,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:24:05,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892813376] [2022-01-31 18:24:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:05,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:24:05,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:24:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:24:05,739 INFO L87 Difference]: Start difference. First operand 144 states and 188 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:06,089 INFO L93 Difference]: Finished difference Result 212 states and 265 transitions. [2022-01-31 18:24:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:24:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-01-31 18:24:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:06,090 INFO L225 Difference]: With dead ends: 212 [2022-01-31 18:24:06,090 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 18:24:06,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:24:06,092 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 483 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:06,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 30 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 18:24:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2022-01-31 18:24:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.3265306122448979) internal successors, (195), 147 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-01-31 18:24:06,105 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 126 [2022-01-31 18:24:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:06,105 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-01-31 18:24:06,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-01-31 18:24:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 18:24:06,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:06,106 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:06,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:24:06,106 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash -224331758, now seen corresponding path program 15 times [2022-01-31 18:24:06,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:06,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742259764] [2022-01-31 18:24:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:06,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:06,109 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:06,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:06,110 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:06,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:06,271 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 18:24:06,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:06,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742259764] [2022-01-31 18:24:06,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [742259764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:06,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:06,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:24:06,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336849463] [2022-01-31 18:24:06,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:06,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:24:06,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:24:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:24:06,272 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 18:24:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:06,645 INFO L93 Difference]: Finished difference Result 224 states and 280 transitions. [2022-01-31 18:24:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:24:06,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 134 [2022-01-31 18:24:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:06,646 INFO L225 Difference]: With dead ends: 224 [2022-01-31 18:24:06,646 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 18:24:06,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:24:06,647 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 518 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:06,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 40 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 18:24:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2022-01-31 18:24:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.3269230769230769) internal successors, (207), 156 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 212 transitions. [2022-01-31 18:24:06,661 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 212 transitions. Word has length 134 [2022-01-31 18:24:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:06,661 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 212 transitions. [2022-01-31 18:24:06,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 18:24:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 212 transitions. [2022-01-31 18:24:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 18:24:06,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:06,662 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:06,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:24:06,662 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1762367126, now seen corresponding path program 16 times [2022-01-31 18:24:06,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:06,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725041295] [2022-01-31 18:24:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:06,665 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:06,665 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:06,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:06,667 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:06,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:06,859 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 18:24:06,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:06,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725041295] [2022-01-31 18:24:06,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [725041295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:06,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:06,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:24:06,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456286638] [2022-01-31 18:24:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:24:06,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:24:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:24:06,861 INFO L87 Difference]: Start difference. First operand 162 states and 212 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:07,265 INFO L93 Difference]: Finished difference Result 236 states and 295 transitions. [2022-01-31 18:24:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:24:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-01-31 18:24:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:07,266 INFO L225 Difference]: With dead ends: 236 [2022-01-31 18:24:07,266 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 18:24:07,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:24:07,268 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 489 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:07,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 40 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 18:24:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2022-01-31 18:24:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 165 states have (on average 1.3272727272727274) internal successors, (219), 165 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2022-01-31 18:24:07,282 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 142 [2022-01-31 18:24:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:07,282 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2022-01-31 18:24:07,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2022-01-31 18:24:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 18:24:07,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:07,284 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:07,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:24:07,284 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1769565678, now seen corresponding path program 17 times [2022-01-31 18:24:07,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:07,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987875660] [2022-01-31 18:24:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:07,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:07,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:07,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:07,288 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:07,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:07,492 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 18:24:07,492 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987875660] [2022-01-31 18:24:07,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [987875660] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:07,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:07,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:24:07,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359737057] [2022-01-31 18:24:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:07,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:24:07,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:07,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:24:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:24:07,494 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:07,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:07,940 INFO L93 Difference]: Finished difference Result 248 states and 310 transitions. [2022-01-31 18:24:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:24:07,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 18:24:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:07,941 INFO L225 Difference]: With dead ends: 248 [2022-01-31 18:24:07,941 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 18:24:07,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:24:07,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 444 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:07,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 70 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 18:24:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2022-01-31 18:24:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.3275862068965518) internal successors, (231), 174 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 236 transitions. [2022-01-31 18:24:07,957 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 236 transitions. Word has length 150 [2022-01-31 18:24:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:07,958 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 236 transitions. [2022-01-31 18:24:07,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 236 transitions. [2022-01-31 18:24:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 18:24:07,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:07,959 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:07,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:24:07,959 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:07,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:07,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1797652842, now seen corresponding path program 18 times [2022-01-31 18:24:07,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:07,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174537520] [2022-01-31 18:24:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:07,962 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:07,962 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:07,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:07,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:08,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:08,184 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 18:24:08,184 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:08,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174537520] [2022-01-31 18:24:08,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174537520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:08,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:08,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:24:08,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643770777] [2022-01-31 18:24:08,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:08,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:24:08,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:24:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:24:08,185 INFO L87 Difference]: Start difference. First operand 180 states and 236 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:08,648 INFO L93 Difference]: Finished difference Result 260 states and 325 transitions. [2022-01-31 18:24:08,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:24:08,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-01-31 18:24:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:08,649 INFO L225 Difference]: With dead ends: 260 [2022-01-31 18:24:08,649 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 18:24:08,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:24:08,650 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 719 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:08,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 30 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 18:24:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2022-01-31 18:24:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.3278688524590163) internal successors, (243), 183 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 248 transitions. [2022-01-31 18:24:08,667 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 248 transitions. Word has length 158 [2022-01-31 18:24:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:08,667 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 248 transitions. [2022-01-31 18:24:08,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 248 transitions. [2022-01-31 18:24:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 18:24:08,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:08,669 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:08,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:24:08,669 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 980511762, now seen corresponding path program 19 times [2022-01-31 18:24:08,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:08,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975880466] [2022-01-31 18:24:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:08,672 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:08,672 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:08,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:08,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:08,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:08,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:08,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975880466] [2022-01-31 18:24:08,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975880466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:08,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:08,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:24:08,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701650993] [2022-01-31 18:24:08,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:08,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:24:08,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:08,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:24:08,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:24:08,937 INFO L87 Difference]: Start difference. First operand 189 states and 248 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 18:24:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:09,454 INFO L93 Difference]: Finished difference Result 272 states and 340 transitions. [2022-01-31 18:24:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:24:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 166 [2022-01-31 18:24:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:09,456 INFO L225 Difference]: With dead ends: 272 [2022-01-31 18:24:09,456 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 18:24:09,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:24:09,458 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 642 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:09,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 35 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 18:24:09,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 198. [2022-01-31 18:24:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.328125) internal successors, (255), 192 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-01-31 18:24:09,483 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 166 [2022-01-31 18:24:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:09,483 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-01-31 18:24:09,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 18:24:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-01-31 18:24:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 18:24:09,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:09,485 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:09,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:24:09,485 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:09,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1025923434, now seen corresponding path program 20 times [2022-01-31 18:24:09,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:09,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215212828] [2022-01-31 18:24:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:09,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:09,488 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:09,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:09,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:09,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:09,741 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 18:24:09,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:09,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215212828] [2022-01-31 18:24:09,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1215212828] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:09,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:09,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:24:09,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801274616] [2022-01-31 18:24:09,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:09,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:24:09,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:24:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:24:09,743 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:10,244 INFO L93 Difference]: Finished difference Result 284 states and 355 transitions. [2022-01-31 18:24:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:24:10,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 18:24:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:10,246 INFO L225 Difference]: With dead ends: 284 [2022-01-31 18:24:10,246 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 18:24:10,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:24:10,247 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 805 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:10,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 40 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:24:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 18:24:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2022-01-31 18:24:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.328358208955224) internal successors, (267), 201 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 272 transitions. [2022-01-31 18:24:10,280 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 272 transitions. Word has length 174 [2022-01-31 18:24:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:10,281 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 272 transitions. [2022-01-31 18:24:10,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 272 transitions. [2022-01-31 18:24:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 18:24:10,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:10,283 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:10,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:24:10,284 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:10,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:10,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1141799406, now seen corresponding path program 21 times [2022-01-31 18:24:10,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:10,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997267115] [2022-01-31 18:24:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:10,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:10,287 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:10,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:10,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:10,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:10,567 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 18:24:10,568 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997267115] [2022-01-31 18:24:10,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [997267115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:10,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:10,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:24:10,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843367640] [2022-01-31 18:24:10,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:10,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:24:10,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:24:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:24:10,570 INFO L87 Difference]: Start difference. First operand 207 states and 272 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 24 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 18:24:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:11,098 INFO L93 Difference]: Finished difference Result 296 states and 370 transitions. [2022-01-31 18:24:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:24:11,099 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 24 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 182 [2022-01-31 18:24:11,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:11,100 INFO L225 Difference]: With dead ends: 296 [2022-01-31 18:24:11,100 INFO L226 Difference]: Without dead ends: 222 [2022-01-31 18:24:11,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:24:11,101 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 640 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:11,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 45 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-31 18:24:11,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2022-01-31 18:24:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.3285714285714285) internal successors, (279), 210 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 284 transitions. [2022-01-31 18:24:11,122 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 284 transitions. Word has length 182 [2022-01-31 18:24:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:11,122 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 284 transitions. [2022-01-31 18:24:11,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 24 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 18:24:11,122 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 284 transitions. [2022-01-31 18:24:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 18:24:11,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:11,123 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:11,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:24:11,123 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:11,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1298493802, now seen corresponding path program 22 times [2022-01-31 18:24:11,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:11,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037740098] [2022-01-31 18:24:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:11,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:11,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:11,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:11,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:11,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:11,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037740098] [2022-01-31 18:24:11,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037740098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:11,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:11,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:24:11,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377226214] [2022-01-31 18:24:11,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:11,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:24:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:24:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:24:11,408 INFO L87 Difference]: Start difference. First operand 216 states and 284 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:11,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:11,970 INFO L93 Difference]: Finished difference Result 308 states and 385 transitions. [2022-01-31 18:24:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:24:11,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 18:24:11,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:11,972 INFO L225 Difference]: With dead ends: 308 [2022-01-31 18:24:11,972 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 18:24:11,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:24:11,973 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 867 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:11,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 30 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 18:24:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2022-01-31 18:24:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 219 states have (on average 1.3287671232876712) internal successors, (291), 219 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 296 transitions. [2022-01-31 18:24:12,001 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 296 transitions. Word has length 190 [2022-01-31 18:24:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:12,001 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 296 transitions. [2022-01-31 18:24:12,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 25 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 296 transitions. [2022-01-31 18:24:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 18:24:12,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:12,002 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:12,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:24:12,002 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:12,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1936269294, now seen corresponding path program 23 times [2022-01-31 18:24:12,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:12,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013818404] [2022-01-31 18:24:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:12,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:12,012 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:12,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:12,014 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:12,299 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 18:24:12,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013818404] [2022-01-31 18:24:12,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013818404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:12,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:12,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:24:12,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706026557] [2022-01-31 18:24:12,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:12,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:24:12,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:12,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:24:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:24:12,300 INFO L87 Difference]: Start difference. First operand 225 states and 296 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 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 18:24:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:12,910 INFO L93 Difference]: Finished difference Result 320 states and 400 transitions. [2022-01-31 18:24:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:24:12,915 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 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 198 [2022-01-31 18:24:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:12,917 INFO L225 Difference]: With dead ends: 320 [2022-01-31 18:24:12,917 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 18:24:12,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:24:12,918 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 782 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:12,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 40 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 18:24:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2022-01-31 18:24:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.3289473684210527) internal successors, (303), 228 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 308 transitions. [2022-01-31 18:24:12,943 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 308 transitions. Word has length 198 [2022-01-31 18:24:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:12,944 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 308 transitions. [2022-01-31 18:24:12,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 26 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 18:24:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 308 transitions. [2022-01-31 18:24:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 18:24:12,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:12,944 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:12,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:24:12,945 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -934065814, now seen corresponding path program 24 times [2022-01-31 18:24:12,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:12,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218268748] [2022-01-31 18:24:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:12,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:12,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:12,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:12,950 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:13,262 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 18:24:13,262 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218268748] [2022-01-31 18:24:13,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218268748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:13,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:13,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:24:13,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029158530] [2022-01-31 18:24:13,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:13,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:24:13,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:24:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:24:13,263 INFO L87 Difference]: Start difference. First operand 234 states and 308 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:13,960 INFO L93 Difference]: Finished difference Result 332 states and 415 transitions. [2022-01-31 18:24:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:24:13,961 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-01-31 18:24:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:13,962 INFO L225 Difference]: With dead ends: 332 [2022-01-31 18:24:13,962 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 18:24:13,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:24:13,963 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 905 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:13,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 30 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 18:24:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2022-01-31 18:24:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 237 states have (on average 1.3291139240506329) internal successors, (315), 237 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 320 transitions. [2022-01-31 18:24:13,989 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 320 transitions. Word has length 206 [2022-01-31 18:24:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:13,989 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 320 transitions. [2022-01-31 18:24:13,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 27 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 320 transitions. [2022-01-31 18:24:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 18:24:13,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:13,990 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:13,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:24:13,990 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1309574638, now seen corresponding path program 25 times [2022-01-31 18:24:13,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:13,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320157642] [2022-01-31 18:24:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:13,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:13,993 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:13,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:13,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:14,317 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 18:24:14,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:14,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320157642] [2022-01-31 18:24:14,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320157642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:14,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:14,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:24:14,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617994602] [2022-01-31 18:24:14,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:14,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:24:14,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:24:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:24:14,319 INFO L87 Difference]: Start difference. First operand 243 states and 320 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:14,994 INFO L93 Difference]: Finished difference Result 344 states and 430 transitions. [2022-01-31 18:24:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:24:14,994 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 18:24:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:14,995 INFO L225 Difference]: With dead ends: 344 [2022-01-31 18:24:14,995 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 18:24:14,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:24:14,996 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 924 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:14,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 35 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 18:24:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2022-01-31 18:24:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.329268292682927) internal successors, (327), 246 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2022-01-31 18:24:15,025 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 214 [2022-01-31 18:24:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:15,025 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2022-01-31 18:24:15,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 28 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2022-01-31 18:24:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 18:24:15,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:15,026 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:15,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:24:15,026 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:15,027 INFO L85 PathProgramCache]: Analyzing trace with hash -966794902, now seen corresponding path program 26 times [2022-01-31 18:24:15,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:15,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840937955] [2022-01-31 18:24:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:15,029 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:15,029 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:15,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:15,031 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:15,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:15,388 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 18:24:15,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840937955] [2022-01-31 18:24:15,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [840937955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:15,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:15,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:24:15,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995558378] [2022-01-31 18:24:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:15,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:24:15,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:24:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:24:15,389 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 29 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:16,103 INFO L93 Difference]: Finished difference Result 356 states and 445 transitions. [2022-01-31 18:24:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:24:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 29 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-01-31 18:24:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:16,105 INFO L225 Difference]: With dead ends: 356 [2022-01-31 18:24:16,105 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 18:24:16,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:24:16,106 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1087 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:16,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1088 Valid, 30 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 18:24:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 261. [2022-01-31 18:24:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 255 states have (on average 1.3294117647058823) internal successors, (339), 255 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 344 transitions. [2022-01-31 18:24:16,136 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 344 transitions. Word has length 222 [2022-01-31 18:24:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 344 transitions. [2022-01-31 18:24:16,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 29 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 344 transitions. [2022-01-31 18:24:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 18:24:16,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:16,137 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:16,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:24:16,137 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash -980331502, now seen corresponding path program 27 times [2022-01-31 18:24:16,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:16,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435309126] [2022-01-31 18:24:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:16,140 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:16,140 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:16,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:16,143 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:16,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:16,513 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 18:24:16,513 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435309126] [2022-01-31 18:24:16,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435309126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:16,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:16,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:24:16,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128839692] [2022-01-31 18:24:16,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:16,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:24:16,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:24:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:24:16,515 INFO L87 Difference]: Start difference. First operand 261 states and 344 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 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 18:24:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:17,261 INFO L93 Difference]: Finished difference Result 368 states and 460 transitions. [2022-01-31 18:24:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:24:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 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 230 [2022-01-31 18:24:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:17,262 INFO L225 Difference]: With dead ends: 368 [2022-01-31 18:24:17,262 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 18:24:17,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:24:17,264 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 850 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:17,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 45 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 18:24:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2022-01-31 18:24:17,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.3295454545454546) internal successors, (351), 264 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 356 transitions. [2022-01-31 18:24:17,303 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 356 transitions. Word has length 230 [2022-01-31 18:24:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:17,303 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 356 transitions. [2022-01-31 18:24:17,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 30 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 18:24:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 356 transitions. [2022-01-31 18:24:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 18:24:17,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:17,304 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:17,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:24:17,304 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1274755434, now seen corresponding path program 28 times [2022-01-31 18:24:17,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:17,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011890157] [2022-01-31 18:24:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:17,306 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:17,306 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:17,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:17,309 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:17,667 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 18:24:17,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011890157] [2022-01-31 18:24:17,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011890157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:17,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:17,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:24:17,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443919162] [2022-01-31 18:24:17,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:17,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:24:17,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:24:17,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:24:17,669 INFO L87 Difference]: Start difference. First operand 270 states and 356 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:18,435 INFO L93 Difference]: Finished difference Result 380 states and 475 transitions. [2022-01-31 18:24:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:24:18,435 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-01-31 18:24:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:18,436 INFO L225 Difference]: With dead ends: 380 [2022-01-31 18:24:18,436 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 18:24:18,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:24:18,438 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 965 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:18,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 45 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 18:24:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 279. [2022-01-31 18:24:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 273 states have (on average 1.3296703296703296) internal successors, (363), 273 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 368 transitions. [2022-01-31 18:24:18,477 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 368 transitions. Word has length 238 [2022-01-31 18:24:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:18,477 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 368 transitions. [2022-01-31 18:24:18,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 368 transitions. [2022-01-31 18:24:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 18:24:18,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:18,478 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:18,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:24:18,478 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -184127982, now seen corresponding path program 29 times [2022-01-31 18:24:18,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:18,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204564883] [2022-01-31 18:24:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:18,481 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:18,481 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:18,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:18,483 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:18,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:18,878 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:18,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204564883] [2022-01-31 18:24:18,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1204564883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:18,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:18,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:24:18,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091612336] [2022-01-31 18:24:18,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:18,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:24:18,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:18,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:24:18,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:24:18,879 INFO L87 Difference]: Start difference. First operand 279 states and 368 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 32 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:19,660 INFO L93 Difference]: Finished difference Result 392 states and 490 transitions. [2022-01-31 18:24:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:24:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 32 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-01-31 18:24:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:19,662 INFO L225 Difference]: With dead ends: 392 [2022-01-31 18:24:19,662 INFO L226 Difference]: Without dead ends: 294 [2022-01-31 18:24:19,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:24:19,663 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1152 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:19,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 40 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:24:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-31 18:24:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 288. [2022-01-31 18:24:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.3297872340425532) internal successors, (375), 282 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 380 transitions. [2022-01-31 18:24:19,699 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 380 transitions. Word has length 246 [2022-01-31 18:24:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:19,699 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 380 transitions. [2022-01-31 18:24:19,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 32 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 380 transitions. [2022-01-31 18:24:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-31 18:24:19,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:19,700 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:19,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:24:19,700 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1234522474, now seen corresponding path program 30 times [2022-01-31 18:24:19,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:19,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577449264] [2022-01-31 18:24:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:19,703 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:19,703 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:19,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:19,706 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:20,107 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 18:24:20,107 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:20,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577449264] [2022-01-31 18:24:20,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577449264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:20,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:20,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:24:20,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785569005] [2022-01-31 18:24:20,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:20,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:24:20,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:24:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:24:20,108 INFO L87 Difference]: Start difference. First operand 288 states and 380 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:20,961 INFO L93 Difference]: Finished difference Result 404 states and 505 transitions. [2022-01-31 18:24:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:24:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-01-31 18:24:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:20,964 INFO L225 Difference]: With dead ends: 404 [2022-01-31 18:24:20,964 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 18:24:20,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:24:20,965 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1091 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:20,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1092 Valid, 40 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 18:24:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 297. [2022-01-31 18:24:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.3298969072164948) internal successors, (387), 291 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 392 transitions. [2022-01-31 18:24:21,006 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 392 transitions. Word has length 254 [2022-01-31 18:24:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:21,006 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 392 transitions. [2022-01-31 18:24:21,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 33 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 392 transitions. [2022-01-31 18:24:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 18:24:21,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:21,007 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:24:21,007 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash 31508498, now seen corresponding path program 31 times [2022-01-31 18:24:21,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:21,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065595234] [2022-01-31 18:24:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:21,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:21,011 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:21,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:21,014 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:21,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:21,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:21,531 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 18:24:21,532 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:21,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065595234] [2022-01-31 18:24:21,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065595234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:21,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:21,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:24:21,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634478693] [2022-01-31 18:24:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:21,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:24:21,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:24:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:24:21,534 INFO L87 Difference]: Start difference. First operand 297 states and 392 transitions. Second operand has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:22,418 INFO L93 Difference]: Finished difference Result 416 states and 520 transitions. [2022-01-31 18:24:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:24:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-01-31 18:24:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:22,419 INFO L225 Difference]: With dead ends: 416 [2022-01-31 18:24:22,419 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 18:24:22,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:24:22,420 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1302 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:22,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1303 Valid, 30 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 18:24:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 306. [2022-01-31 18:24:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.33) internal successors, (399), 300 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 404 transitions. [2022-01-31 18:24:22,460 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 404 transitions. Word has length 262 [2022-01-31 18:24:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:22,460 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 404 transitions. [2022-01-31 18:24:22,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.085714285714286) internal successors, (108), 34 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 404 transitions. [2022-01-31 18:24:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-31 18:24:22,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:22,461 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:22,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:24:22,461 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:22,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1684133526, now seen corresponding path program 32 times [2022-01-31 18:24:22,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:22,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994541589] [2022-01-31 18:24:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:22,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:22,464 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:22,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:22,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:22,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:22,963 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:22,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994541589] [2022-01-31 18:24:22,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [994541589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:22,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:22,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:24:22,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049338398] [2022-01-31 18:24:22,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:22,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:24:22,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:24:22,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:24:22,964 INFO L87 Difference]: Start difference. First operand 306 states and 404 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:23,855 INFO L93 Difference]: Finished difference Result 428 states and 535 transitions. [2022-01-31 18:24:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:24:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-01-31 18:24:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:23,857 INFO L225 Difference]: With dead ends: 428 [2022-01-31 18:24:23,857 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 18:24:23,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:24:23,858 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1393 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:23,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 45 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 18:24:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 315. [2022-01-31 18:24:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.3300970873786409) internal successors, (411), 309 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2022-01-31 18:24:23,915 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 416 transitions. Word has length 270 [2022-01-31 18:24:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:23,915 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 416 transitions. [2022-01-31 18:24:23,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 35 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 416 transitions. [2022-01-31 18:24:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-31 18:24:23,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:23,916 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:23,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:24:23,916 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1102078482, now seen corresponding path program 33 times [2022-01-31 18:24:23,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751760387] [2022-01-31 18:24:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:23,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:23,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:23,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:23,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:24,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:24,447 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 18:24:24,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:24,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751760387] [2022-01-31 18:24:24,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [751760387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:24,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:24,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:24:24,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816644411] [2022-01-31 18:24:24,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:24,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:24:24,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:24:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:24:24,448 INFO L87 Difference]: Start difference. First operand 315 states and 416 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 36 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 18:24:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:25,377 INFO L93 Difference]: Finished difference Result 440 states and 550 transitions. [2022-01-31 18:24:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:24:25,377 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 36 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 278 [2022-01-31 18:24:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:25,378 INFO L225 Difference]: With dead ends: 440 [2022-01-31 18:24:25,378 INFO L226 Difference]: Without dead ends: 330 [2022-01-31 18:24:25,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:24:25,380 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1204 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:25,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 40 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-31 18:24:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2022-01-31 18:24:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.330188679245283) internal successors, (423), 318 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 428 transitions. [2022-01-31 18:24:25,425 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 428 transitions. Word has length 278 [2022-01-31 18:24:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:25,425 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 428 transitions. [2022-01-31 18:24:25,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 36 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 18:24:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 428 transitions. [2022-01-31 18:24:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 18:24:25,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:25,426 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:25,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:24:25,426 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:25,427 INFO L85 PathProgramCache]: Analyzing trace with hash 176537962, now seen corresponding path program 34 times [2022-01-31 18:24:25,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:25,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133030847] [2022-01-31 18:24:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:25,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:25,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:25,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:25,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:25,923 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 18:24:25,923 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:25,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133030847] [2022-01-31 18:24:25,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133030847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:25,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:25,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:24:25,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749641835] [2022-01-31 18:24:25,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:25,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:24:25,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:25,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:24:25,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:24:25,924 INFO L87 Difference]: Start difference. First operand 324 states and 428 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 37 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:26,884 INFO L93 Difference]: Finished difference Result 452 states and 565 transitions. [2022-01-31 18:24:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:24:26,885 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 37 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-01-31 18:24:26,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:26,886 INFO L225 Difference]: With dead ends: 452 [2022-01-31 18:24:26,886 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 18:24:26,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:24:26,887 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1183 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:26,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 45 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 18:24:26,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2022-01-31 18:24:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 327 states have (on average 1.3302752293577982) internal successors, (435), 327 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 440 transitions. [2022-01-31 18:24:26,944 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 440 transitions. Word has length 286 [2022-01-31 18:24:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:26,944 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 440 transitions. [2022-01-31 18:24:26,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 37 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 440 transitions. [2022-01-31 18:24:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-31 18:24:26,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:26,946 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:26,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:24:26,946 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:26,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1643824110, now seen corresponding path program 35 times [2022-01-31 18:24:26,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:26,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209335783] [2022-01-31 18:24:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:26,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:26,949 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:26,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:26,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:27,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:27,491 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:27,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209335783] [2022-01-31 18:24:27,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [209335783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:27,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:27,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:24:27,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964352118] [2022-01-31 18:24:27,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:27,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:24:27,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:24:27,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:24:27,493 INFO L87 Difference]: Start difference. First operand 333 states and 440 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:28,584 INFO L93 Difference]: Finished difference Result 464 states and 580 transitions. [2022-01-31 18:24:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:24:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-01-31 18:24:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:28,585 INFO L225 Difference]: With dead ends: 464 [2022-01-31 18:24:28,585 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 18:24:28,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:24:28,586 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1450 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1451 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:28,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1451 Valid, 50 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 18:24:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 342. [2022-01-31 18:24:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.3303571428571428) internal successors, (447), 336 states have internal predecessors, (447), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 452 transitions. [2022-01-31 18:24:28,634 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 452 transitions. Word has length 294 [2022-01-31 18:24:28,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:28,635 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 452 transitions. [2022-01-31 18:24:28,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 38 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 452 transitions. [2022-01-31 18:24:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-31 18:24:28,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:28,636 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:28,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:24:28,636 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1253841258, now seen corresponding path program 36 times [2022-01-31 18:24:28,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:28,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375716450] [2022-01-31 18:24:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:28,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:28,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:28,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:28,642 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:29,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:29,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375716450] [2022-01-31 18:24:29,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375716450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:29,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:29,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:24:29,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107340538] [2022-01-31 18:24:29,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:29,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:24:29,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:29,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:24:29,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:24:29,215 INFO L87 Difference]: Start difference. First operand 342 states and 452 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:30,277 INFO L93 Difference]: Finished difference Result 476 states and 595 transitions. [2022-01-31 18:24:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:24:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-01-31 18:24:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:30,278 INFO L225 Difference]: With dead ends: 476 [2022-01-31 18:24:30,278 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 18:24:30,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:24:30,279 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1669 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:30,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 35 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 18:24:30,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 351. [2022-01-31 18:24:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.3304347826086957) internal successors, (459), 345 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 464 transitions. [2022-01-31 18:24:30,331 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 464 transitions. Word has length 302 [2022-01-31 18:24:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:30,331 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 464 transitions. [2022-01-31 18:24:30,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 39 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 464 transitions. [2022-01-31 18:24:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 18:24:30,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:30,332 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:30,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:24:30,332 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1804642798, now seen corresponding path program 37 times [2022-01-31 18:24:30,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:30,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082314302] [2022-01-31 18:24:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:30,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:30,335 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:30,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:30,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:30,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:30,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082314302] [2022-01-31 18:24:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1082314302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:30,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:30,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:24:30,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820686218] [2022-01-31 18:24:30,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:30,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:24:30,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:24:30,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:24:30,908 INFO L87 Difference]: Start difference. First operand 351 states and 464 transitions. Second operand has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:32,038 INFO L93 Difference]: Finished difference Result 488 states and 610 transitions. [2022-01-31 18:24:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:24:32,039 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-01-31 18:24:32,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:32,041 INFO L225 Difference]: With dead ends: 488 [2022-01-31 18:24:32,041 INFO L226 Difference]: Without dead ends: 366 [2022-01-31 18:24:32,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:24:32,042 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1192 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:32,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 60 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-31 18:24:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 360. [2022-01-31 18:24:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.3305084745762712) internal successors, (471), 354 states have internal predecessors, (471), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 476 transitions. [2022-01-31 18:24:32,112 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 476 transitions. Word has length 310 [2022-01-31 18:24:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:32,113 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 476 transitions. [2022-01-31 18:24:32,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 40 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 476 transitions. [2022-01-31 18:24:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-31 18:24:32,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:32,114 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:32,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:24:32,115 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash -55496342, now seen corresponding path program 38 times [2022-01-31 18:24:32,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:32,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576755321] [2022-01-31 18:24:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:32,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:32,118 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:32,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:32,123 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:32,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:32,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:32,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576755321] [2022-01-31 18:24:32,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576755321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:32,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:32,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:24:32,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945691587] [2022-01-31 18:24:32,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:32,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:24:32,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:24:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:24:32,752 INFO L87 Difference]: Start difference. First operand 360 states and 476 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 41 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:33,933 INFO L93 Difference]: Finished difference Result 500 states and 625 transitions. [2022-01-31 18:24:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:24:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 41 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-01-31 18:24:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:33,934 INFO L225 Difference]: With dead ends: 500 [2022-01-31 18:24:33,934 INFO L226 Difference]: Without dead ends: 375 [2022-01-31 18:24:33,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:24:33,936 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1707 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:33,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1708 Valid, 40 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-31 18:24:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 369. [2022-01-31 18:24:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 363 states have (on average 1.3305785123966942) internal successors, (483), 363 states have internal predecessors, (483), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 488 transitions. [2022-01-31 18:24:33,991 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 488 transitions. Word has length 318 [2022-01-31 18:24:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:33,992 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 488 transitions. [2022-01-31 18:24:33,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 41 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 488 transitions. [2022-01-31 18:24:33,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-01-31 18:24:33,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:33,993 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:33,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:24:33,993 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash 914272274, now seen corresponding path program 39 times [2022-01-31 18:24:33,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:33,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148569671] [2022-01-31 18:24:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:33,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:33,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:33,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:34,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:34,616 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 18:24:34,616 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148569671] [2022-01-31 18:24:34,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1148569671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:34,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:34,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:24:34,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880133271] [2022-01-31 18:24:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:34,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:24:34,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:24:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:24:34,618 INFO L87 Difference]: Start difference. First operand 369 states and 488 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 42 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 18:24:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:35,841 INFO L93 Difference]: Finished difference Result 512 states and 640 transitions. [2022-01-31 18:24:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:24:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 42 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 326 [2022-01-31 18:24:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:35,843 INFO L225 Difference]: With dead ends: 512 [2022-01-31 18:24:35,843 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 18:24:35,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:24:35,844 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:35,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2103 Valid, 30 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 18:24:35,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 378. [2022-01-31 18:24:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 372 states have (on average 1.3306451612903225) internal successors, (495), 372 states have internal predecessors, (495), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 500 transitions. [2022-01-31 18:24:35,904 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 500 transitions. Word has length 326 [2022-01-31 18:24:35,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:35,905 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 500 transitions. [2022-01-31 18:24:35,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 42 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 18:24:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 500 transitions. [2022-01-31 18:24:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-01-31 18:24:35,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:35,906 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:35,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:24:35,907 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1395324566, now seen corresponding path program 40 times [2022-01-31 18:24:35,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:35,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900574422] [2022-01-31 18:24:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:35,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:35,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:35,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:35,915 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:36,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:36,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:36,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900574422] [2022-01-31 18:24:36,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900574422] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:36,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:36,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:24:36,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266228565] [2022-01-31 18:24:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:36,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:24:36,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:24:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:24:36,565 INFO L87 Difference]: Start difference. First operand 378 states and 500 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 43 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:37,836 INFO L93 Difference]: Finished difference Result 524 states and 655 transitions. [2022-01-31 18:24:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:24:37,836 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 43 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-01-31 18:24:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:37,838 INFO L225 Difference]: With dead ends: 524 [2022-01-31 18:24:37,838 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 18:24:37,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:24:37,839 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1313 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:37,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 55 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:24:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 18:24:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 387. [2022-01-31 18:24:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 381 states have (on average 1.330708661417323) internal successors, (507), 381 states have internal predecessors, (507), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 512 transitions. [2022-01-31 18:24:37,901 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 512 transitions. Word has length 334 [2022-01-31 18:24:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:37,901 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 512 transitions. [2022-01-31 18:24:37,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 43 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 512 transitions. [2022-01-31 18:24:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-31 18:24:37,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:37,903 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:37,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:24:37,903 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash 700664338, now seen corresponding path program 41 times [2022-01-31 18:24:37,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:37,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570361461] [2022-01-31 18:24:37,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:37,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:37,906 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:37,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:37,910 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:38,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:38,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:38,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570361461] [2022-01-31 18:24:38,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [570361461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:38,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:38,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:24:38,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083550758] [2022-01-31 18:24:38,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:38,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:24:38,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:24:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:24:38,632 INFO L87 Difference]: Start difference. First operand 387 states and 512 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:39,978 INFO L93 Difference]: Finished difference Result 536 states and 670 transitions. [2022-01-31 18:24:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:24:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-01-31 18:24:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:39,980 INFO L225 Difference]: With dead ends: 536 [2022-01-31 18:24:39,980 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 18:24:39,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:24:39,988 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1436 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:39,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 60 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 18:24:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 396. [2022-01-31 18:24:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 390 states have (on average 1.3307692307692307) internal successors, (519), 390 states have internal predecessors, (519), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 524 transitions. [2022-01-31 18:24:40,070 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 524 transitions. Word has length 342 [2022-01-31 18:24:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:40,071 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 524 transitions. [2022-01-31 18:24:40,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 44 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 524 transitions. [2022-01-31 18:24:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-01-31 18:24:40,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:40,073 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:40,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:24:40,073 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash -745037462, now seen corresponding path program 42 times [2022-01-31 18:24:40,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:40,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690365744] [2022-01-31 18:24:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:40,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:40,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:40,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:40,080 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:40,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:40,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690365744] [2022-01-31 18:24:40,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1690365744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:40,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:24:40,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083358933] [2022-01-31 18:24:40,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:40,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:24:40,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:24:40,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:24:40,765 INFO L87 Difference]: Start difference. First operand 396 states and 524 transitions. Second operand has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 45 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:42,125 INFO L93 Difference]: Finished difference Result 548 states and 685 transitions. [2022-01-31 18:24:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:24:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 45 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-01-31 18:24:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:42,127 INFO L225 Difference]: With dead ends: 548 [2022-01-31 18:24:42,127 INFO L226 Difference]: Without dead ends: 411 [2022-01-31 18:24:42,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:24:42,128 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1455 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:42,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 60 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-31 18:24:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 405. [2022-01-31 18:24:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 399 states have (on average 1.330827067669173) internal successors, (531), 399 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 536 transitions. [2022-01-31 18:24:42,220 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 536 transitions. Word has length 350 [2022-01-31 18:24:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:42,220 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 536 transitions. [2022-01-31 18:24:42,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 45 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 536 transitions. [2022-01-31 18:24:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-01-31 18:24:42,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:42,222 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:42,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:24:42,222 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:42,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1479728110, now seen corresponding path program 43 times [2022-01-31 18:24:42,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:42,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011910460] [2022-01-31 18:24:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:42,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:42,225 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:42,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:42,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:42,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:42,943 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 18:24:42,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:42,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011910460] [2022-01-31 18:24:42,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011910460] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:42,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:42,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:24:42,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583179271] [2022-01-31 18:24:42,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:42,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:24:42,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:42,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:24:42,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:24:42,945 INFO L87 Difference]: Start difference. First operand 405 states and 536 transitions. Second operand has 47 states, 47 states have (on average 3.0638297872340425) internal successors, (144), 46 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:44,344 INFO L93 Difference]: Finished difference Result 560 states and 700 transitions. [2022-01-31 18:24:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:24:44,344 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0638297872340425) internal successors, (144), 46 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 358 [2022-01-31 18:24:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:44,346 INFO L225 Difference]: With dead ends: 560 [2022-01-31 18:24:44,346 INFO L226 Difference]: Without dead ends: 420 [2022-01-31 18:24:44,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:24:44,347 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1682 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:44,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 45 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-31 18:24:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 414. [2022-01-31 18:24:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 408 states have (on average 1.3308823529411764) internal successors, (543), 408 states have internal predecessors, (543), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 548 transitions. [2022-01-31 18:24:44,425 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 548 transitions. Word has length 358 [2022-01-31 18:24:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:44,425 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 548 transitions. [2022-01-31 18:24:44,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0638297872340425) internal successors, (144), 46 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 548 transitions. [2022-01-31 18:24:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-01-31 18:24:44,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:44,426 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:44,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:24:44,427 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash -714540694, now seen corresponding path program 44 times [2022-01-31 18:24:44,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:44,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551101149] [2022-01-31 18:24:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:44,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:44,429 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:44,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:44,434 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:45,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:45,180 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 18:24:45,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551101149] [2022-01-31 18:24:45,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [551101149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:45,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:45,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:24:45,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257175881] [2022-01-31 18:24:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:45,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:24:45,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:24:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:24:45,181 INFO L87 Difference]: Start difference. First operand 414 states and 548 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:46,721 INFO L93 Difference]: Finished difference Result 572 states and 715 transitions. [2022-01-31 18:24:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:24:46,722 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 366 [2022-01-31 18:24:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:46,723 INFO L225 Difference]: With dead ends: 572 [2022-01-31 18:24:46,723 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 18:24:46,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:24:46,725 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1757 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:46,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1758 Valid, 55 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 18:24:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 423. [2022-01-31 18:24:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 417 states have (on average 1.330935251798561) internal successors, (555), 417 states have internal predecessors, (555), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 560 transitions. [2022-01-31 18:24:46,815 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 560 transitions. Word has length 366 [2022-01-31 18:24:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:46,815 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 560 transitions. [2022-01-31 18:24:46,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 47 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 560 transitions. [2022-01-31 18:24:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-31 18:24:46,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:46,817 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:46,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:24:46,817 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2116828690, now seen corresponding path program 45 times [2022-01-31 18:24:46,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:46,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983887502] [2022-01-31 18:24:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:46,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:46,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:46,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:46,828 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:47,601 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 18:24:47,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:47,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983887502] [2022-01-31 18:24:47,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [983887502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:47,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:47,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:24:47,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726297651] [2022-01-31 18:24:47,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:47,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:24:47,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:24:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:24:47,602 INFO L87 Difference]: Start difference. First operand 423 states and 560 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 48 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 18:24:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:49,102 INFO L93 Difference]: Finished difference Result 584 states and 730 transitions. [2022-01-31 18:24:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:24:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 48 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 374 [2022-01-31 18:24:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:49,103 INFO L225 Difference]: With dead ends: 584 [2022-01-31 18:24:49,103 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 18:24:49,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:24:49,105 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1832 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:49,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1833 Valid, 40 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 18:24:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2022-01-31 18:24:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.3309859154929577) internal successors, (567), 426 states have internal predecessors, (567), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 572 transitions. [2022-01-31 18:24:49,213 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 572 transitions. Word has length 374 [2022-01-31 18:24:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:49,213 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 572 transitions. [2022-01-31 18:24:49,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 48 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 18:24:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 572 transitions. [2022-01-31 18:24:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-01-31 18:24:49,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:49,215 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:49,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:24:49,215 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 45683050, now seen corresponding path program 46 times [2022-01-31 18:24:49,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:49,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927707469] [2022-01-31 18:24:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:49,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:49,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:49,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:49,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:50,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:50,025 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 18:24:50,026 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:50,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927707469] [2022-01-31 18:24:50,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927707469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:50,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:50,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:24:50,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884025628] [2022-01-31 18:24:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:50,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:24:50,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:50,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:24:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:24:50,027 INFO L87 Difference]: Start difference. First operand 432 states and 572 transitions. Second operand has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:51,622 INFO L93 Difference]: Finished difference Result 596 states and 745 transitions. [2022-01-31 18:24:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:24:51,622 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 382 [2022-01-31 18:24:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:51,623 INFO L225 Difference]: With dead ends: 596 [2022-01-31 18:24:51,623 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 18:24:51,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:24:51,624 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2099 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:51,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2100 Valid, 30 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 18:24:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2022-01-31 18:24:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 435 states have (on average 1.3310344827586207) internal successors, (579), 435 states have internal predecessors, (579), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 584 transitions. [2022-01-31 18:24:51,711 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 584 transitions. Word has length 382 [2022-01-31 18:24:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:51,711 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 584 transitions. [2022-01-31 18:24:51,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.06) internal successors, (153), 49 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 584 transitions. [2022-01-31 18:24:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-01-31 18:24:51,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:51,713 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:51,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:24:51,713 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 242259986, now seen corresponding path program 47 times [2022-01-31 18:24:51,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975944789] [2022-01-31 18:24:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:51,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:51,715 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:51,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:51,720 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:52,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:52,699 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975944789] [2022-01-31 18:24:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975944789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:52,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:52,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:24:52,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300515301] [2022-01-31 18:24:52,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:52,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:24:52,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:24:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:24:52,700 INFO L87 Difference]: Start difference. First operand 441 states and 584 transitions. Second operand has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 50 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:54,333 INFO L93 Difference]: Finished difference Result 608 states and 760 transitions. [2022-01-31 18:24:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:24:54,333 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 50 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 390 [2022-01-31 18:24:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:54,335 INFO L225 Difference]: With dead ends: 608 [2022-01-31 18:24:54,335 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 18:24:54,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:24:54,336 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1646 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:54,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1647 Valid, 45 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 18:24:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 450. [2022-01-31 18:24:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 444 states have (on average 1.3310810810810811) internal successors, (591), 444 states have internal predecessors, (591), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 596 transitions. [2022-01-31 18:24:54,418 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 596 transitions. Word has length 390 [2022-01-31 18:24:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:54,418 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 596 transitions. [2022-01-31 18:24:54,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 50 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 596 transitions. [2022-01-31 18:24:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-01-31 18:24:54,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:54,420 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:54,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:24:54,420 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1745360534, now seen corresponding path program 48 times [2022-01-31 18:24:54,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566060915] [2022-01-31 18:24:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:54,422 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:54,422 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:54,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:54,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:55,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:55,278 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 18:24:55,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:55,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566060915] [2022-01-31 18:24:55,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566060915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:55,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:55,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:24:55,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465704398] [2022-01-31 18:24:55,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:55,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:24:55,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:55,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:24:55,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:24:55,280 INFO L87 Difference]: Start difference. First operand 450 states and 596 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:56,999 INFO L93 Difference]: Finished difference Result 620 states and 775 transitions. [2022-01-31 18:24:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:24:56,999 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 398 [2022-01-31 18:24:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:57,001 INFO L225 Difference]: With dead ends: 620 [2022-01-31 18:24:57,001 INFO L226 Difference]: Without dead ends: 465 [2022-01-31 18:24:57,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:24:57,002 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1905 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:57,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 50 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-31 18:24:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2022-01-31 18:24:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 453 states have (on average 1.3311258278145695) internal successors, (603), 453 states have internal predecessors, (603), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 608 transitions. [2022-01-31 18:24:57,086 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 608 transitions. Word has length 398 [2022-01-31 18:24:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:57,086 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 608 transitions. [2022-01-31 18:24:57,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 608 transitions. [2022-01-31 18:24:57,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-01-31 18:24:57,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:57,087 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:57,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:24:57,088 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1311388178, now seen corresponding path program 49 times [2022-01-31 18:24:57,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875647464] [2022-01-31 18:24:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:57,090 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:57,090 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:57,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:57,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:57,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:57,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:57,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875647464] [2022-01-31 18:24:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [875647464] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:57,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:57,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:24:57,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817666157] [2022-01-31 18:24:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:57,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:24:57,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:24:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:24:57,996 INFO L87 Difference]: Start difference. First operand 459 states and 608 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 52 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:59,753 INFO L93 Difference]: Finished difference Result 632 states and 790 transitions. [2022-01-31 18:24:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:24:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 52 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 406 [2022-01-31 18:24:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:59,755 INFO L225 Difference]: With dead ends: 632 [2022-01-31 18:24:59,755 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 18:24:59,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:24:59,756 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2052 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2053 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:59,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2053 Valid, 35 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:24:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 18:24:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 468. [2022-01-31 18:24:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 462 states have (on average 1.3311688311688312) internal successors, (615), 462 states have internal predecessors, (615), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 620 transitions. [2022-01-31 18:24:59,843 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 620 transitions. Word has length 406 [2022-01-31 18:24:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:59,844 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 620 transitions. [2022-01-31 18:24:59,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 52 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 620 transitions. [2022-01-31 18:24:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-31 18:24:59,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:59,845 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:59,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:24:59,845 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1114275478, now seen corresponding path program 50 times [2022-01-31 18:24:59,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:59,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971988622] [2022-01-31 18:24:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:59,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:59,848 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:24:59,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:59,853 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:00,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:00,753 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:00,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971988622] [2022-01-31 18:25:00,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [971988622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:00,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:00,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:25:00,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366743750] [2022-01-31 18:25:00,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:00,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:25:00,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:00,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:25:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:25:00,754 INFO L87 Difference]: Start difference. First operand 468 states and 620 transitions. Second operand has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:02,610 INFO L93 Difference]: Finished difference Result 644 states and 805 transitions. [2022-01-31 18:25:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:25:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 414 [2022-01-31 18:25:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:02,612 INFO L225 Difference]: With dead ends: 644 [2022-01-31 18:25:02,612 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 18:25:02,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:25:02,614 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1727 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:02,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 55 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:25:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 18:25:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 477. [2022-01-31 18:25:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 471 states have (on average 1.3312101910828025) internal successors, (627), 471 states have internal predecessors, (627), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 632 transitions. [2022-01-31 18:25:02,718 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 632 transitions. Word has length 414 [2022-01-31 18:25:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:02,718 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 632 transitions. [2022-01-31 18:25:02,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.0555555555555554) internal successors, (165), 53 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 632 transitions. [2022-01-31 18:25:02,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-01-31 18:25:02,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:02,719 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:02,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:25:02,720 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash -957805550, now seen corresponding path program 51 times [2022-01-31 18:25:02,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:02,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102894575] [2022-01-31 18:25:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:02,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:02,722 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:02,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:02,728 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:03,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:03,687 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 18:25:03,687 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:03,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102894575] [2022-01-31 18:25:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102894575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:03,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:03,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:25:03,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845193572] [2022-01-31 18:25:03,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:25:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:25:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:25:03,689 INFO L87 Difference]: Start difference. First operand 477 states and 632 transitions. Second operand has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 54 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 18:25:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:05,531 INFO L93 Difference]: Finished difference Result 656 states and 820 transitions. [2022-01-31 18:25:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:25:05,531 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 54 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 422 [2022-01-31 18:25:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:05,532 INFO L225 Difference]: With dead ends: 656 [2022-01-31 18:25:05,533 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 18:25:05,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:25:05,534 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2218 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:05,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2219 Valid, 35 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:25:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 18:25:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 486. [2022-01-31 18:25:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 480 states have (on average 1.33125) internal successors, (639), 480 states have internal predecessors, (639), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 644 transitions. [2022-01-31 18:25:05,666 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 644 transitions. Word has length 422 [2022-01-31 18:25:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:05,666 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 644 transitions. [2022-01-31 18:25:05,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0545454545454547) internal successors, (168), 54 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 18:25:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 644 transitions. [2022-01-31 18:25:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 18:25:05,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:05,668 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:05,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:25:05,668 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:05,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2013144726, now seen corresponding path program 52 times [2022-01-31 18:25:05,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:05,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917082899] [2022-01-31 18:25:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:05,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:05,670 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:05,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:05,676 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:06,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:06,657 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 18:25:06,657 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:06,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917082899] [2022-01-31 18:25:06,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [917082899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:06,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:06,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:25:06,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015418928] [2022-01-31 18:25:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:06,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:25:06,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:25:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:25:06,658 INFO L87 Difference]: Start difference. First operand 486 states and 644 transitions. Second operand has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 55 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:08,594 INFO L93 Difference]: Finished difference Result 668 states and 835 transitions. [2022-01-31 18:25:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:25:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 55 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 430 [2022-01-31 18:25:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:08,596 INFO L225 Difference]: With dead ends: 668 [2022-01-31 18:25:08,596 INFO L226 Difference]: Without dead ends: 501 [2022-01-31 18:25:08,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:25:08,597 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:08,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2646 Valid, 40 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-31 18:25:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 495. [2022-01-31 18:25:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 489 states have (on average 1.3312883435582823) internal successors, (651), 489 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 656 transitions. [2022-01-31 18:25:08,697 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 656 transitions. Word has length 430 [2022-01-31 18:25:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:08,697 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 656 transitions. [2022-01-31 18:25:08,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.0535714285714284) internal successors, (171), 55 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 656 transitions. [2022-01-31 18:25:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-31 18:25:08,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:08,699 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:08,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:25:08,699 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1774377454, now seen corresponding path program 53 times [2022-01-31 18:25:08,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:08,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782423867] [2022-01-31 18:25:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:08,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:08,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:08,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:08,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:09,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:09,864 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 18:25:09,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:09,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782423867] [2022-01-31 18:25:09,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [782423867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:09,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:09,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:25:09,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115698589] [2022-01-31 18:25:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:09,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:25:09,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:25:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:25:09,865 INFO L87 Difference]: Start difference. First operand 495 states and 656 transitions. Second operand has 57 states, 57 states have (on average 3.0526315789473686) internal successors, (174), 56 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:11,859 INFO L93 Difference]: Finished difference Result 680 states and 850 transitions. [2022-01-31 18:25:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:25:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.0526315789473686) internal successors, (174), 56 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 438 [2022-01-31 18:25:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:11,860 INFO L225 Difference]: With dead ends: 680 [2022-01-31 18:25:11,860 INFO L226 Difference]: Without dead ends: 510 [2022-01-31 18:25:11,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:25:11,861 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2128 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2129 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:11,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2129 Valid, 35 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:25:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-31 18:25:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 504. [2022-01-31 18:25:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.3313253012048192) internal successors, (663), 498 states have internal predecessors, (663), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 668 transitions. [2022-01-31 18:25:11,983 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 668 transitions. Word has length 438 [2022-01-31 18:25:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:11,984 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 668 transitions. [2022-01-31 18:25:11,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.0526315789473686) internal successors, (174), 56 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 668 transitions. [2022-01-31 18:25:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-01-31 18:25:11,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:11,986 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:11,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:25:11,986 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -139660950, now seen corresponding path program 54 times [2022-01-31 18:25:11,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:11,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120705017] [2022-01-31 18:25:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:11,989 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:11,989 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:11,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:11,996 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:13,082 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:13,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120705017] [2022-01-31 18:25:13,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2120705017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:13,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:13,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:25:13,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878634313] [2022-01-31 18:25:13,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:13,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:25:13,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:25:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:25:13,084 INFO L87 Difference]: Start difference. First operand 504 states and 668 transitions. Second operand has 58 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 57 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:15,201 INFO L93 Difference]: Finished difference Result 692 states and 865 transitions. [2022-01-31 18:25:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:25:15,202 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 57 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 446 [2022-01-31 18:25:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:15,203 INFO L225 Difference]: With dead ends: 692 [2022-01-31 18:25:15,203 INFO L226 Difference]: Without dead ends: 519 [2022-01-31 18:25:15,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:25:15,205 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2395 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:15,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2396 Valid, 50 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:15,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-31 18:25:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2022-01-31 18:25:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 507 states have (on average 1.331360946745562) internal successors, (675), 507 states have internal predecessors, (675), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 680 transitions. [2022-01-31 18:25:15,321 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 680 transitions. Word has length 446 [2022-01-31 18:25:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:15,321 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 680 transitions. [2022-01-31 18:25:15,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.0517241379310347) internal successors, (177), 57 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 680 transitions. [2022-01-31 18:25:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-01-31 18:25:15,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:15,322 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:15,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:25:15,323 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1840676882, now seen corresponding path program 55 times [2022-01-31 18:25:15,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63551062] [2022-01-31 18:25:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:15,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:15,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:15,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:15,340 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:16,398 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 18:25:16,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:16,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63551062] [2022-01-31 18:25:16,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [63551062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:16,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:16,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:25:16,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660044355] [2022-01-31 18:25:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:25:16,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:25:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:25:16,400 INFO L87 Difference]: Start difference. First operand 513 states and 680 transitions. Second operand has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 58 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:18,600 INFO L93 Difference]: Finished difference Result 704 states and 880 transitions. [2022-01-31 18:25:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:25:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 58 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 454 [2022-01-31 18:25:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:18,601 INFO L225 Difference]: With dead ends: 704 [2022-01-31 18:25:18,602 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 18:25:18,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:25:18,603 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2374 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:18,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 35 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 18:25:18,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 522. [2022-01-31 18:25:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 516 states have (on average 1.3313953488372092) internal successors, (687), 516 states have internal predecessors, (687), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 692 transitions. [2022-01-31 18:25:18,722 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 692 transitions. Word has length 454 [2022-01-31 18:25:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:18,722 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 692 transitions. [2022-01-31 18:25:18,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0508474576271185) internal successors, (180), 58 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 692 transitions. [2022-01-31 18:25:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2022-01-31 18:25:18,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:18,724 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:18,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:25:18,724 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:18,724 INFO L85 PathProgramCache]: Analyzing trace with hash -116995734, now seen corresponding path program 56 times [2022-01-31 18:25:18,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:18,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031835938] [2022-01-31 18:25:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:18,726 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:18,726 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:18,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:18,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:19,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:19,838 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 18:25:19,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:19,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031835938] [2022-01-31 18:25:19,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031835938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:19,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:19,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:25:19,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575226501] [2022-01-31 18:25:19,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:19,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:25:19,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:25:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:25:19,842 INFO L87 Difference]: Start difference. First operand 522 states and 692 transitions. Second operand has 60 states, 60 states have (on average 3.05) internal successors, (183), 59 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:22,068 INFO L93 Difference]: Finished difference Result 716 states and 895 transitions. [2022-01-31 18:25:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:25:22,069 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.05) internal successors, (183), 59 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 462 [2022-01-31 18:25:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:22,070 INFO L225 Difference]: With dead ends: 716 [2022-01-31 18:25:22,070 INFO L226 Difference]: Without dead ends: 537 [2022-01-31 18:25:22,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:25:22,071 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2769 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2770 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:22,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2770 Valid, 40 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-31 18:25:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 531. [2022-01-31 18:25:22,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 525 states have (on average 1.3314285714285714) internal successors, (699), 525 states have internal predecessors, (699), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 704 transitions. [2022-01-31 18:25:22,184 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 704 transitions. Word has length 462 [2022-01-31 18:25:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:22,184 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 704 transitions. [2022-01-31 18:25:22,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.05) internal successors, (183), 59 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 704 transitions. [2022-01-31 18:25:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-31 18:25:22,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:22,186 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:22,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:25:22,186 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1830479342, now seen corresponding path program 57 times [2022-01-31 18:25:22,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:22,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67259820] [2022-01-31 18:25:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:22,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:22,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:22,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:22,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:23,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:23,341 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 18:25:23,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:23,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67259820] [2022-01-31 18:25:23,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [67259820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:23,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:23,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:25:23,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391425498] [2022-01-31 18:25:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:23,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:25:23,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:25:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:25:23,345 INFO L87 Difference]: Start difference. First operand 531 states and 704 transitions. Second operand has 61 states, 61 states have (on average 3.0491803278688523) internal successors, (186), 60 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 18:25:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:25,663 INFO L93 Difference]: Finished difference Result 728 states and 910 transitions. [2022-01-31 18:25:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:25:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0491803278688523) internal successors, (186), 60 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 470 [2022-01-31 18:25:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:25,664 INFO L225 Difference]: With dead ends: 728 [2022-01-31 18:25:25,665 INFO L226 Difference]: Without dead ends: 546 [2022-01-31 18:25:25,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:25:25,666 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2204 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:25,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2205 Valid, 45 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-31 18:25:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 540. [2022-01-31 18:25:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 534 states have (on average 1.3314606741573034) internal successors, (711), 534 states have internal predecessors, (711), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 716 transitions. [2022-01-31 18:25:25,782 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 716 transitions. Word has length 470 [2022-01-31 18:25:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:25,782 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 716 transitions. [2022-01-31 18:25:25,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0491803278688523) internal successors, (186), 60 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 18:25:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 716 transitions. [2022-01-31 18:25:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-01-31 18:25:25,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:25,784 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:25,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:25:25,784 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1686069610, now seen corresponding path program 58 times [2022-01-31 18:25:25,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:25,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752001522] [2022-01-31 18:25:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:25,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:25,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:25,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:25,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:26,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:26,990 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 18:25:26,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:26,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752001522] [2022-01-31 18:25:26,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1752001522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:26,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:26,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:25:26,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695463978] [2022-01-31 18:25:26,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:26,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:25:26,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:26,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:25:26,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:25:26,992 INFO L87 Difference]: Start difference. First operand 540 states and 716 transitions. Second operand has 62 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 61 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:29,367 INFO L93 Difference]: Finished difference Result 740 states and 925 transitions. [2022-01-31 18:25:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:25:29,367 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 61 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 478 [2022-01-31 18:25:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:29,369 INFO L225 Difference]: With dead ends: 740 [2022-01-31 18:25:29,369 INFO L226 Difference]: Without dead ends: 555 [2022-01-31 18:25:29,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:25:29,370 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:29,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 50 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-31 18:25:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 549. [2022-01-31 18:25:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 543 states have (on average 1.3314917127071824) internal successors, (723), 543 states have internal predecessors, (723), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 728 transitions. [2022-01-31 18:25:29,498 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 728 transitions. Word has length 478 [2022-01-31 18:25:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:29,498 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 728 transitions. [2022-01-31 18:25:29,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0483870967741935) internal successors, (189), 61 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 728 transitions. [2022-01-31 18:25:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2022-01-31 18:25:29,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:29,500 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:29,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:25:29,500 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash -547818478, now seen corresponding path program 59 times [2022-01-31 18:25:29,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:29,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774937590] [2022-01-31 18:25:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:29,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:29,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:29,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:29,510 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:30,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:30,714 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 18:25:30,714 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:30,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774937590] [2022-01-31 18:25:30,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1774937590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:30,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:30,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:25:30,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377984535] [2022-01-31 18:25:30,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:30,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:25:30,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:25:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:25:30,716 INFO L87 Difference]: Start difference. First operand 549 states and 728 transitions. Second operand has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 62 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:33,189 INFO L93 Difference]: Finished difference Result 752 states and 940 transitions. [2022-01-31 18:25:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:25:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 62 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 486 [2022-01-31 18:25:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:33,191 INFO L225 Difference]: With dead ends: 752 [2022-01-31 18:25:33,191 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 18:25:33,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:25:33,192 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2850 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2851 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:33,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2851 Valid, 40 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 18:25:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2022-01-31 18:25:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 552 states have (on average 1.3315217391304348) internal successors, (735), 552 states have internal predecessors, (735), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 740 transitions. [2022-01-31 18:25:33,319 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 740 transitions. Word has length 486 [2022-01-31 18:25:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:33,319 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 740 transitions. [2022-01-31 18:25:33,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 62 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 740 transitions. [2022-01-31 18:25:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-01-31 18:25:33,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:33,321 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:33,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:25:33,321 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -24725142, now seen corresponding path program 60 times [2022-01-31 18:25:33,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:33,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37755947] [2022-01-31 18:25:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:33,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:33,324 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:33,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:33,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:34,701 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:34,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37755947] [2022-01-31 18:25:34,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37755947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:34,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:34,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:25:34,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857083919] [2022-01-31 18:25:34,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:34,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:25:34,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:34,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:25:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:25:34,703 INFO L87 Difference]: Start difference. First operand 558 states and 740 transitions. Second operand has 64 states, 64 states have (on average 3.046875) internal successors, (195), 63 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:37,366 INFO L93 Difference]: Finished difference Result 764 states and 955 transitions. [2022-01-31 18:25:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:25:37,366 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.046875) internal successors, (195), 63 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 494 [2022-01-31 18:25:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:37,368 INFO L225 Difference]: With dead ends: 764 [2022-01-31 18:25:37,368 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 18:25:37,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:25:37,370 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2589 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:37,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2590 Valid, 30 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 18:25:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 567. [2022-01-31 18:25:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 561 states have (on average 1.3315508021390374) internal successors, (747), 561 states have internal predecessors, (747), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 752 transitions. [2022-01-31 18:25:37,505 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 752 transitions. Word has length 494 [2022-01-31 18:25:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:37,506 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 752 transitions. [2022-01-31 18:25:37,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.046875) internal successors, (195), 63 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 752 transitions. [2022-01-31 18:25:37,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-01-31 18:25:37,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:37,508 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:37,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:25:37,508 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:37,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:37,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1063121390, now seen corresponding path program 61 times [2022-01-31 18:25:37,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:37,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532893634] [2022-01-31 18:25:37,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:37,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:37,510 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:37,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:37,518 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:38,781 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 18:25:38,781 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532893634] [2022-01-31 18:25:38,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532893634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:38,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:38,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:25:38,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330933197] [2022-01-31 18:25:38,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:25:38,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:25:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:25:38,783 INFO L87 Difference]: Start difference. First operand 567 states and 752 transitions. Second operand has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 64 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:41,395 INFO L93 Difference]: Finished difference Result 776 states and 970 transitions. [2022-01-31 18:25:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:25:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 64 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 502 [2022-01-31 18:25:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:41,396 INFO L225 Difference]: With dead ends: 776 [2022-01-31 18:25:41,397 INFO L226 Difference]: Without dead ends: 582 [2022-01-31 18:25:41,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:25:41,398 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3145 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:41,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3145 Valid, 40 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:25:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-31 18:25:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 576. [2022-01-31 18:25:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 570 states have (on average 1.331578947368421) internal successors, (759), 570 states have internal predecessors, (759), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 764 transitions. [2022-01-31 18:25:41,542 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 764 transitions. Word has length 502 [2022-01-31 18:25:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:41,542 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 764 transitions. [2022-01-31 18:25:41,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.046153846153846) internal successors, (198), 64 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 764 transitions. [2022-01-31 18:25:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2022-01-31 18:25:41,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:41,544 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:41,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:25:41,544 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2005717354, now seen corresponding path program 62 times [2022-01-31 18:25:41,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:41,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919023307] [2022-01-31 18:25:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:41,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:41,546 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:41,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:41,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:42,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919023307] [2022-01-31 18:25:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1919023307] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:42,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:42,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:25:42,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359568371] [2022-01-31 18:25:42,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:42,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:25:42,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:42,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:25:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:25:42,859 INFO L87 Difference]: Start difference. First operand 576 states and 764 transitions. Second operand has 66 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 65 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:45,524 INFO L93 Difference]: Finished difference Result 788 states and 985 transitions. [2022-01-31 18:25:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:25:45,525 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 65 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 510 [2022-01-31 18:25:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:45,526 INFO L225 Difference]: With dead ends: 788 [2022-01-31 18:25:45,526 INFO L226 Difference]: Without dead ends: 591 [2022-01-31 18:25:45,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:25:45,528 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2291 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2292 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:45,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2292 Valid, 55 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:25:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-31 18:25:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 585. [2022-01-31 18:25:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 579 states have (on average 1.3316062176165804) internal successors, (771), 579 states have internal predecessors, (771), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 776 transitions. [2022-01-31 18:25:45,676 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 776 transitions. Word has length 510 [2022-01-31 18:25:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:45,676 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 776 transitions. [2022-01-31 18:25:45,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.0454545454545454) internal successors, (201), 65 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 776 transitions. [2022-01-31 18:25:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-01-31 18:25:45,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:45,678 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:45,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:25:45,678 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash 944793618, now seen corresponding path program 63 times [2022-01-31 18:25:45,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:45,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013668976] [2022-01-31 18:25:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:45,680 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:45,680 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:45,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:45,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:47,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:47,084 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 18:25:47,084 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013668976] [2022-01-31 18:25:47,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2013668976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:47,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:47,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:25:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784839336] [2022-01-31 18:25:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:47,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:25:47,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:25:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:25:47,086 INFO L87 Difference]: Start difference. First operand 585 states and 776 transitions. Second operand has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 66 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 18:25:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:49,854 INFO L93 Difference]: Finished difference Result 800 states and 1000 transitions. [2022-01-31 18:25:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:25:49,854 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 66 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 518 [2022-01-31 18:25:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:49,855 INFO L225 Difference]: With dead ends: 800 [2022-01-31 18:25:49,856 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 18:25:49,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:25:49,857 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2542 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2543 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:49,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2543 Valid, 50 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:25:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 18:25:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 594. [2022-01-31 18:25:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 588 states have (on average 1.3316326530612246) internal successors, (783), 588 states have internal predecessors, (783), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 788 transitions. [2022-01-31 18:25:49,998 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 788 transitions. Word has length 518 [2022-01-31 18:25:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:49,998 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 788 transitions. [2022-01-31 18:25:49,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.044776119402985) internal successors, (204), 66 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 18:25:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 788 transitions. [2022-01-31 18:25:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-01-31 18:25:50,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:50,000 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:50,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:25:50,001 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1812048234, now seen corresponding path program 64 times [2022-01-31 18:25:50,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:50,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280459815] [2022-01-31 18:25:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:50,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:50,003 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:50,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:50,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:51,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:51,393 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 18:25:51,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:51,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280459815] [2022-01-31 18:25:51,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [280459815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:51,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:51,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:25:51,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952234766] [2022-01-31 18:25:51,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:51,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:25:51,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:51,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:25:51,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:25:51,395 INFO L87 Difference]: Start difference. First operand 594 states and 788 transitions. Second operand has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 67 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:54,162 INFO L93 Difference]: Finished difference Result 812 states and 1015 transitions. [2022-01-31 18:25:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:25:54,162 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 67 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 526 [2022-01-31 18:25:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:54,164 INFO L225 Difference]: With dead ends: 812 [2022-01-31 18:25:54,164 INFO L226 Difference]: Without dead ends: 609 [2022-01-31 18:25:54,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:25:54,165 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2689 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:54,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 35 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:25:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-31 18:25:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 603. [2022-01-31 18:25:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 597 states have (on average 1.3316582914572865) internal successors, (795), 597 states have internal predecessors, (795), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 800 transitions. [2022-01-31 18:25:54,311 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 800 transitions. Word has length 526 [2022-01-31 18:25:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:54,312 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 800 transitions. [2022-01-31 18:25:54,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 67 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 800 transitions. [2022-01-31 18:25:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-01-31 18:25:54,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:54,314 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:54,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:25:54,314 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash -604765678, now seen corresponding path program 65 times [2022-01-31 18:25:54,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:54,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824454600] [2022-01-31 18:25:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:54,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:54,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:54,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:55,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:55,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824454600] [2022-01-31 18:25:55,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [824454600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:55,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:55,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:25:55,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859954755] [2022-01-31 18:25:55,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:55,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:25:55,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:55,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:25:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:25:55,736 INFO L87 Difference]: Start difference. First operand 603 states and 800 transitions. Second operand has 69 states, 69 states have (on average 3.0434782608695654) internal successors, (210), 68 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:58,678 INFO L93 Difference]: Finished difference Result 824 states and 1030 transitions. [2022-01-31 18:25:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:25:58,678 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.0434782608695654) internal successors, (210), 68 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 534 [2022-01-31 18:25:58,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:58,680 INFO L225 Difference]: With dead ends: 824 [2022-01-31 18:25:58,680 INFO L226 Difference]: Without dead ends: 618 [2022-01-31 18:25:58,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:25:58,682 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2436 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2437 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:58,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2437 Valid, 65 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:25:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-31 18:25:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 612. [2022-01-31 18:25:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 606 states have (on average 1.3316831683168318) internal successors, (807), 606 states have internal predecessors, (807), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 812 transitions. [2022-01-31 18:25:58,845 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 812 transitions. Word has length 534 [2022-01-31 18:25:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:58,845 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 812 transitions. [2022-01-31 18:25:58,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.0434782608695654) internal successors, (210), 68 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 812 transitions. [2022-01-31 18:25:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2022-01-31 18:25:58,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:58,847 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:58,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:25:58,847 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:58,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1683308906, now seen corresponding path program 66 times [2022-01-31 18:25:58,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:58,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308274283] [2022-01-31 18:25:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:58,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:58,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:25:58,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:58,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:00,321 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 18:26:00,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:00,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308274283] [2022-01-31 18:26:00,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308274283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:00,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:00,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:26:00,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637698292] [2022-01-31 18:26:00,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:00,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:26:00,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:26:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:26:00,323 INFO L87 Difference]: Start difference. First operand 612 states and 812 transitions. Second operand has 70 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 69 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:03,342 INFO L93 Difference]: Finished difference Result 836 states and 1045 transitions. [2022-01-31 18:26:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:26:03,343 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 69 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 542 [2022-01-31 18:26:03,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:03,345 INFO L225 Difference]: With dead ends: 836 [2022-01-31 18:26:03,345 INFO L226 Difference]: Without dead ends: 627 [2022-01-31 18:26:03,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:26:03,346 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2455 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2456 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:03,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2456 Valid, 65 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-31 18:26:03,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 621. [2022-01-31 18:26:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 615 states have (on average 1.3317073170731708) internal successors, (819), 615 states have internal predecessors, (819), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 824 transitions. [2022-01-31 18:26:03,529 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 824 transitions. Word has length 542 [2022-01-31 18:26:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:03,530 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 824 transitions. [2022-01-31 18:26:03,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 69 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 824 transitions. [2022-01-31 18:26:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2022-01-31 18:26:03,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:03,532 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:03,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:26:03,532 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -719528942, now seen corresponding path program 67 times [2022-01-31 18:26:03,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:03,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45756717] [2022-01-31 18:26:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:03,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:03,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:03,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:03,545 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:05,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:05,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45756717] [2022-01-31 18:26:05,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [45756717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:05,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:05,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:26:05,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060548052] [2022-01-31 18:26:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:26:05,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:26:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:26:05,050 INFO L87 Difference]: Start difference. First operand 621 states and 824 transitions. Second operand has 71 states, 71 states have (on average 3.0422535211267605) internal successors, (216), 70 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:08,155 INFO L93 Difference]: Finished difference Result 848 states and 1060 transitions. [2022-01-31 18:26:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:26:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.0422535211267605) internal successors, (216), 70 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 550 [2022-01-31 18:26:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:08,157 INFO L225 Difference]: With dead ends: 848 [2022-01-31 18:26:08,157 INFO L226 Difference]: Without dead ends: 636 [2022-01-31 18:26:08,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:26:08,158 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2850 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2851 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:08,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2851 Valid, 40 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-31 18:26:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 630. [2022-01-31 18:26:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 624 states have (on average 1.3317307692307692) internal successors, (831), 624 states have internal predecessors, (831), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 836 transitions. [2022-01-31 18:26:08,322 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 836 transitions. Word has length 550 [2022-01-31 18:26:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:08,322 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 836 transitions. [2022-01-31 18:26:08,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.0422535211267605) internal successors, (216), 70 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:08,322 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 836 transitions. [2022-01-31 18:26:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-01-31 18:26:08,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:08,324 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:08,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:26:08,324 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:08,325 INFO L85 PathProgramCache]: Analyzing trace with hash -721970838, now seen corresponding path program 68 times [2022-01-31 18:26:08,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:08,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246025586] [2022-01-31 18:26:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:08,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:08,327 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:08,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:08,336 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:09,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:09,901 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 18:26:09,901 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246025586] [2022-01-31 18:26:09,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1246025586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:09,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:09,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:26:09,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949358698] [2022-01-31 18:26:09,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:09,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:26:09,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:26:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:26:09,902 INFO L87 Difference]: Start difference. First operand 630 states and 836 transitions. Second operand has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 71 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:13,078 INFO L93 Difference]: Finished difference Result 860 states and 1075 transitions. [2022-01-31 18:26:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:26:13,078 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 71 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 558 [2022-01-31 18:26:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:13,080 INFO L225 Difference]: With dead ends: 860 [2022-01-31 18:26:13,080 INFO L226 Difference]: Without dead ends: 645 [2022-01-31 18:26:13,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:26:13,081 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2805 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2806 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:13,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2806 Valid, 45 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-31 18:26:13,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 639. [2022-01-31 18:26:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 633 states have (on average 1.3317535545023698) internal successors, (843), 633 states have internal predecessors, (843), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 848 transitions. [2022-01-31 18:26:13,255 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 848 transitions. Word has length 558 [2022-01-31 18:26:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:13,255 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 848 transitions. [2022-01-31 18:26:13,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 71 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 848 transitions. [2022-01-31 18:26:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-01-31 18:26:13,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:13,258 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:13,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:26:13,258 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash -514132462, now seen corresponding path program 69 times [2022-01-31 18:26:13,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:13,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567075052] [2022-01-31 18:26:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:13,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:13,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:13,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:13,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:14,856 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 18:26:14,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:14,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567075052] [2022-01-31 18:26:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567075052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:14,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:14,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:26:14,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065356320] [2022-01-31 18:26:14,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:14,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:26:14,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:14,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:26:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:26:14,858 INFO L87 Difference]: Start difference. First operand 639 states and 848 transitions. Second operand has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 72 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 18:26:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:18,179 INFO L93 Difference]: Finished difference Result 872 states and 1090 transitions. [2022-01-31 18:26:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:26:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 72 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 566 [2022-01-31 18:26:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:18,181 INFO L225 Difference]: With dead ends: 872 [2022-01-31 18:26:18,181 INFO L226 Difference]: Without dead ends: 654 [2022-01-31 18:26:18,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:26:18,183 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3640 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3641 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:18,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3641 Valid, 40 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-31 18:26:18,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 648. [2022-01-31 18:26:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 642 states have (on average 1.3317757009345794) internal successors, (855), 642 states have internal predecessors, (855), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 860 transitions. [2022-01-31 18:26:18,355 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 860 transitions. Word has length 566 [2022-01-31 18:26:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:18,355 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 860 transitions. [2022-01-31 18:26:18,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.041095890410959) internal successors, (222), 72 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 18:26:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 860 transitions. [2022-01-31 18:26:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-01-31 18:26:18,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:18,357 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:18,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:26:18,358 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash 509129066, now seen corresponding path program 70 times [2022-01-31 18:26:18,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:18,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648422659] [2022-01-31 18:26:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:18,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:18,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:18,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:18,370 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:19,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:19,977 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 18:26:19,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:19,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648422659] [2022-01-31 18:26:19,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [648422659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:19,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:19,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:26:19,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557623733] [2022-01-31 18:26:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:19,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:26:19,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:26:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:26:19,979 INFO L87 Difference]: Start difference. First operand 648 states and 860 transitions. Second operand has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 73 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:23,327 INFO L93 Difference]: Finished difference Result 884 states and 1105 transitions. [2022-01-31 18:26:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:26:23,327 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 73 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 574 [2022-01-31 18:26:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:23,329 INFO L225 Difference]: With dead ends: 884 [2022-01-31 18:26:23,329 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 18:26:23,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:26:23,331 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2619 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2620 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:23,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2620 Valid, 55 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 18:26:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 657. [2022-01-31 18:26:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 651 states have (on average 1.3317972350230414) internal successors, (867), 651 states have internal predecessors, (867), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 872 transitions. [2022-01-31 18:26:23,526 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 872 transitions. Word has length 574 [2022-01-31 18:26:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:23,526 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 872 transitions. [2022-01-31 18:26:23,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 73 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 872 transitions. [2022-01-31 18:26:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-01-31 18:26:23,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:23,529 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:23,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:26:23,529 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1379815442, now seen corresponding path program 71 times [2022-01-31 18:26:23,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:23,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090789241] [2022-01-31 18:26:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:23,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:23,531 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:23,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:23,542 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:25,207 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 18:26:25,207 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090789241] [2022-01-31 18:26:25,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090789241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:25,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:25,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:26:25,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632418317] [2022-01-31 18:26:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:25,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:26:25,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:26:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:26:25,209 INFO L87 Difference]: Start difference. First operand 657 states and 872 transitions. Second operand has 75 states, 75 states have (on average 3.04) internal successors, (228), 74 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:28,622 INFO L93 Difference]: Finished difference Result 896 states and 1120 transitions. [2022-01-31 18:26:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:26:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.04) internal successors, (228), 74 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 582 [2022-01-31 18:26:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:28,624 INFO L225 Difference]: With dead ends: 896 [2022-01-31 18:26:28,624 INFO L226 Difference]: Without dead ends: 672 [2022-01-31 18:26:28,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:26:28,626 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2774 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2775 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:28,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2775 Valid, 40 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:26:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-31 18:26:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 666. [2022-01-31 18:26:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 660 states have (on average 1.3318181818181818) internal successors, (879), 660 states have internal predecessors, (879), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 884 transitions. [2022-01-31 18:26:28,820 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 884 transitions. Word has length 582 [2022-01-31 18:26:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:28,821 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 884 transitions. [2022-01-31 18:26:28,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.04) internal successors, (228), 74 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 884 transitions. [2022-01-31 18:26:28,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-01-31 18:26:28,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:28,823 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:28,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:26:28,823 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1930917526, now seen corresponding path program 72 times [2022-01-31 18:26:28,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:28,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053762213] [2022-01-31 18:26:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:28,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:28,825 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:28,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:28,836 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:30,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:30,552 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 18:26:30,552 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:30,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053762213] [2022-01-31 18:26:30,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053762213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:30,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:30,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:26:30,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282915173] [2022-01-31 18:26:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:30,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:26:30,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:26:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:26:30,554 INFO L87 Difference]: Start difference. First operand 666 states and 884 transitions. Second operand has 76 states, 76 states have (on average 3.039473684210526) internal successors, (231), 75 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:34,281 INFO L93 Difference]: Finished difference Result 908 states and 1135 transitions. [2022-01-31 18:26:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:26:34,281 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.039473684210526) internal successors, (231), 75 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 590 [2022-01-31 18:26:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:34,283 INFO L225 Difference]: With dead ends: 908 [2022-01-31 18:26:34,283 INFO L226 Difference]: Without dead ends: 681 [2022-01-31 18:26:34,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:26:34,285 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3425 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:34,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3426 Valid, 45 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:26:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-31 18:26:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 675. [2022-01-31 18:26:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 669 states have (on average 1.3318385650224216) internal successors, (891), 669 states have internal predecessors, (891), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 896 transitions. [2022-01-31 18:26:34,496 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 896 transitions. Word has length 590 [2022-01-31 18:26:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:34,497 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 896 transitions. [2022-01-31 18:26:34,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.039473684210526) internal successors, (231), 75 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 896 transitions. [2022-01-31 18:26:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-01-31 18:26:34,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:34,499 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:34,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:26:34,499 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:34,499 INFO L85 PathProgramCache]: Analyzing trace with hash 223799826, now seen corresponding path program 73 times [2022-01-31 18:26:34,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:34,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898413324] [2022-01-31 18:26:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:34,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:34,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:34,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:34,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:34,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,268 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 18:26:36,268 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:36,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898413324] [2022-01-31 18:26:36,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [898413324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:36,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:36,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:26:36,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476843781] [2022-01-31 18:26:36,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:36,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:26:36,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:36,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:26:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:26:36,270 INFO L87 Difference]: Start difference. First operand 675 states and 896 transitions. Second operand has 77 states, 77 states have (on average 3.038961038961039) internal successors, (234), 76 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:39,918 INFO L93 Difference]: Finished difference Result 920 states and 1150 transitions. [2022-01-31 18:26:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:26:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.038961038961039) internal successors, (234), 76 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 598 [2022-01-31 18:26:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:39,920 INFO L225 Difference]: With dead ends: 920 [2022-01-31 18:26:39,920 INFO L226 Difference]: Without dead ends: 690 [2022-01-31 18:26:39,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:26:39,922 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3324 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3325 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:39,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3325 Valid, 35 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:26:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-31 18:26:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 684. [2022-01-31 18:26:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 678 states have (on average 1.331858407079646) internal successors, (903), 678 states have internal predecessors, (903), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 908 transitions. [2022-01-31 18:26:40,138 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 908 transitions. Word has length 598 [2022-01-31 18:26:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:40,139 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 908 transitions. [2022-01-31 18:26:40,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.038961038961039) internal successors, (234), 76 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 908 transitions. [2022-01-31 18:26:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2022-01-31 18:26:40,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:40,141 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:40,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:26:40,141 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:40,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1494688106, now seen corresponding path program 74 times [2022-01-31 18:26:40,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:40,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735901904] [2022-01-31 18:26:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:40,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:40,143 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:40,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:40,154 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:41,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:41,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735901904] [2022-01-31 18:26:41,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735901904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:41,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:41,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:26:41,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043201504] [2022-01-31 18:26:41,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:41,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:26:41,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:26:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:26:41,946 INFO L87 Difference]: Start difference. First operand 684 states and 908 transitions. Second operand has 78 states, 78 states have (on average 3.0384615384615383) internal successors, (237), 77 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:45,709 INFO L93 Difference]: Finished difference Result 932 states and 1165 transitions. [2022-01-31 18:26:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:26:45,710 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.0384615384615383) internal successors, (237), 77 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 606 [2022-01-31 18:26:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:45,712 INFO L225 Difference]: With dead ends: 932 [2022-01-31 18:26:45,712 INFO L226 Difference]: Without dead ends: 699 [2022-01-31 18:26:45,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:26:45,714 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3231 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3232 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:45,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3232 Valid, 45 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:26:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-31 18:26:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 693. [2022-01-31 18:26:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 687 states have (on average 1.331877729257642) internal successors, (915), 687 states have internal predecessors, (915), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 920 transitions. [2022-01-31 18:26:45,937 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 920 transitions. Word has length 606 [2022-01-31 18:26:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:45,937 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 920 transitions. [2022-01-31 18:26:45,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.0384615384615383) internal successors, (237), 77 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 920 transitions. [2022-01-31 18:26:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-01-31 18:26:45,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:45,940 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:45,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:26:45,940 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1942698990, now seen corresponding path program 75 times [2022-01-31 18:26:45,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:45,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749146994] [2022-01-31 18:26:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:45,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:45,942 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:45,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:45,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:47,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:47,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:47,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749146994] [2022-01-31 18:26:47,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749146994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:47,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:47,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:26:47,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825419641] [2022-01-31 18:26:47,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:47,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:26:47,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:26:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:26:47,812 INFO L87 Difference]: Start difference. First operand 693 states and 920 transitions. Second operand has 79 states, 79 states have (on average 3.037974683544304) internal successors, (240), 78 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) [2022-01-31 18:26:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:51,657 INFO L93 Difference]: Finished difference Result 944 states and 1180 transitions. [2022-01-31 18:26:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:26:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.037974683544304) internal successors, (240), 78 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) Word has length 614 [2022-01-31 18:26:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:51,659 INFO L225 Difference]: With dead ends: 944 [2022-01-31 18:26:51,659 INFO L226 Difference]: Without dead ends: 708 [2022-01-31 18:26:51,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:26:51,660 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3794 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:51,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3795 Valid, 35 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:26:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-01-31 18:26:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 702. [2022-01-31 18:26:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 696 states have (on average 1.331896551724138) internal successors, (927), 696 states have internal predecessors, (927), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 932 transitions. [2022-01-31 18:26:51,870 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 932 transitions. Word has length 614 [2022-01-31 18:26:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:51,870 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 932 transitions. [2022-01-31 18:26:51,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.037974683544304) internal successors, (240), 78 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) [2022-01-31 18:26:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 932 transitions. [2022-01-31 18:26:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-01-31 18:26:51,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:51,873 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:51,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:26:51,873 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1487636118, now seen corresponding path program 76 times [2022-01-31 18:26:51,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331359632] [2022-01-31 18:26:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:51,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:51,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:51,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:51,887 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:53,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:53,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:53,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331359632] [2022-01-31 18:26:53,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [331359632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:53,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:53,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:26:53,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378680872] [2022-01-31 18:26:53,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:53,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:26:53,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:26:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:26:53,828 INFO L87 Difference]: Start difference. First operand 702 states and 932 transitions. Second operand has 80 states, 80 states have (on average 3.0375) internal successors, (243), 79 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:57,751 INFO L93 Difference]: Finished difference Result 956 states and 1195 transitions. [2022-01-31 18:26:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:26:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.0375) internal successors, (243), 79 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 622 [2022-01-31 18:26:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:57,753 INFO L225 Difference]: With dead ends: 956 [2022-01-31 18:26:57,753 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 18:26:57,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:26:57,755 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3533 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3534 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:57,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3534 Valid, 35 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:26:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 18:26:57,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 711. [2022-01-31 18:26:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 705 states have (on average 1.3319148936170213) internal successors, (939), 705 states have internal predecessors, (939), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 944 transitions. [2022-01-31 18:26:57,981 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 944 transitions. Word has length 622 [2022-01-31 18:26:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:57,981 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 944 transitions. [2022-01-31 18:26:57,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.0375) internal successors, (243), 79 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 944 transitions. [2022-01-31 18:26:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2022-01-31 18:26:57,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:57,984 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:57,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:26:57,984 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -597172718, now seen corresponding path program 77 times [2022-01-31 18:26:57,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7282932] [2022-01-31 18:26:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:57,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:57,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:26:57,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:57,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:59,959 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 18:26:59,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7282932] [2022-01-31 18:26:59,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7282932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:59,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:59,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:26:59,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726295209] [2022-01-31 18:26:59,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:59,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:26:59,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:26:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:26:59,961 INFO L87 Difference]: Start difference. First operand 711 states and 944 transitions. Second operand has 81 states, 81 states have (on average 3.037037037037037) internal successors, (246), 80 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:04,063 INFO L93 Difference]: Finished difference Result 968 states and 1210 transitions. [2022-01-31 18:27:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:27:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.037037037037037) internal successors, (246), 80 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 630 [2022-01-31 18:27:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:04,065 INFO L225 Difference]: With dead ends: 968 [2022-01-31 18:27:04,065 INFO L226 Difference]: Without dead ends: 726 [2022-01-31 18:27:04,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:27:04,067 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3064 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:04,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3065 Valid, 40 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-01-31 18:27:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 720. [2022-01-31 18:27:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 714 states have (on average 1.3319327731092436) internal successors, (951), 714 states have internal predecessors, (951), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 956 transitions. [2022-01-31 18:27:04,328 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 956 transitions. Word has length 630 [2022-01-31 18:27:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:04,328 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 956 transitions. [2022-01-31 18:27:04,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.037037037037037) internal successors, (246), 80 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 956 transitions. [2022-01-31 18:27:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2022-01-31 18:27:04,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:04,330 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:04,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:27:04,331 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:04,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2012180118, now seen corresponding path program 78 times [2022-01-31 18:27:04,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:04,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989321771] [2022-01-31 18:27:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:04,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:04,333 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:04,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:04,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:06,348 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 18:27:06,348 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:06,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989321771] [2022-01-31 18:27:06,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1989321771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:06,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:06,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:27:06,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392737365] [2022-01-31 18:27:06,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:06,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:27:06,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:27:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:27:06,349 INFO L87 Difference]: Start difference. First operand 720 states and 956 transitions. Second operand has 82 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 81 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:10,513 INFO L93 Difference]: Finished difference Result 980 states and 1225 transitions. [2022-01-31 18:27:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:27:10,514 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 81 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 638 [2022-01-31 18:27:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:10,515 INFO L225 Difference]: With dead ends: 980 [2022-01-31 18:27:10,515 INFO L226 Difference]: Without dead ends: 735 [2022-01-31 18:27:10,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:27:10,517 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3459 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3460 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:10,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3460 Valid, 40 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:10,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-31 18:27:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 729. [2022-01-31 18:27:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 723 states have (on average 1.3319502074688796) internal successors, (963), 723 states have internal predecessors, (963), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 968 transitions. [2022-01-31 18:27:10,752 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 968 transitions. Word has length 638 [2022-01-31 18:27:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:10,752 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 968 transitions. [2022-01-31 18:27:10,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.0365853658536586) internal successors, (249), 81 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 968 transitions. [2022-01-31 18:27:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2022-01-31 18:27:10,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:10,754 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:10,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:27:10,755 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:10,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1618986990, now seen corresponding path program 79 times [2022-01-31 18:27:10,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:10,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751133038] [2022-01-31 18:27:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:10,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:10,757 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:10,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:10,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:12,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:12,796 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 18:27:12,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:12,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751133038] [2022-01-31 18:27:12,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [751133038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:12,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:12,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:27:12,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10907963] [2022-01-31 18:27:12,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:12,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:27:12,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:27:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:27:12,798 INFO L87 Difference]: Start difference. First operand 729 states and 968 transitions. Second operand has 83 states, 83 states have (on average 3.036144578313253) internal successors, (252), 82 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:17,206 INFO L93 Difference]: Finished difference Result 992 states and 1240 transitions. [2022-01-31 18:27:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:27:17,206 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.036144578313253) internal successors, (252), 82 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 646 [2022-01-31 18:27:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:17,207 INFO L225 Difference]: With dead ends: 992 [2022-01-31 18:27:17,207 INFO L226 Difference]: Without dead ends: 744 [2022-01-31 18:27:17,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:27:17,209 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3358 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:17,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3359 Valid, 45 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-01-31 18:27:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 738. [2022-01-31 18:27:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 732 states have (on average 1.3319672131147542) internal successors, (975), 732 states have internal predecessors, (975), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 980 transitions. [2022-01-31 18:27:17,431 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 980 transitions. Word has length 646 [2022-01-31 18:27:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:17,431 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 980 transitions. [2022-01-31 18:27:17,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.036144578313253) internal successors, (252), 82 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 980 transitions. [2022-01-31 18:27:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2022-01-31 18:27:17,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:17,434 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:17,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:27:17,434 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -138712726, now seen corresponding path program 80 times [2022-01-31 18:27:17,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:17,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397941164] [2022-01-31 18:27:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:17,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:17,437 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:17,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:17,450 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:19,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:19,544 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 18:27:19,544 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397941164] [2022-01-31 18:27:19,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397941164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:19,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:19,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:27:19,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210449741] [2022-01-31 18:27:19,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:19,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:27:19,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:27:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:27:19,546 INFO L87 Difference]: Start difference. First operand 738 states and 980 transitions. Second operand has 84 states, 84 states have (on average 3.0357142857142856) internal successors, (255), 83 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:23,936 INFO L93 Difference]: Finished difference Result 1004 states and 1255 transitions. [2022-01-31 18:27:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:27:23,937 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.0357142857142856) internal successors, (255), 83 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 654 [2022-01-31 18:27:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:23,938 INFO L225 Difference]: With dead ends: 1004 [2022-01-31 18:27:23,938 INFO L226 Difference]: Without dead ends: 753 [2022-01-31 18:27:23,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:27:23,939 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3193 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3194 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:23,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3194 Valid, 50 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-31 18:27:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 747. [2022-01-31 18:27:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 741 states have (on average 1.3319838056680162) internal successors, (987), 741 states have internal predecessors, (987), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 992 transitions. [2022-01-31 18:27:24,205 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 992 transitions. Word has length 654 [2022-01-31 18:27:24,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:24,205 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 992 transitions. [2022-01-31 18:27:24,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.0357142857142856) internal successors, (255), 83 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 992 transitions. [2022-01-31 18:27:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-01-31 18:27:24,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:24,209 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:24,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:27:24,209 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash 185455122, now seen corresponding path program 81 times [2022-01-31 18:27:24,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:24,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109129962] [2022-01-31 18:27:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:24,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:24,212 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:24,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:24,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:26,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:26,365 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 18:27:26,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:26,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109129962] [2022-01-31 18:27:26,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1109129962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:26,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:26,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:27:26,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104302030] [2022-01-31 18:27:26,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:26,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:27:26,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:26,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:27:26,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:27:26,368 INFO L87 Difference]: Start difference. First operand 747 states and 992 transitions. Second operand has 85 states, 85 states have (on average 3.0352941176470587) internal successors, (258), 84 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:30,960 INFO L93 Difference]: Finished difference Result 1016 states and 1270 transitions. [2022-01-31 18:27:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:27:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.0352941176470587) internal successors, (258), 84 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 662 [2022-01-31 18:27:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:30,962 INFO L225 Difference]: With dead ends: 1016 [2022-01-31 18:27:30,962 INFO L226 Difference]: Without dead ends: 762 [2022-01-31 18:27:30,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:27:30,964 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3596 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3597 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:30,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3597 Valid, 40 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:27:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-31 18:27:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 756. [2022-01-31 18:27:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 750 states have (on average 1.332) internal successors, (999), 750 states have internal predecessors, (999), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1004 transitions. [2022-01-31 18:27:31,214 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1004 transitions. Word has length 662 [2022-01-31 18:27:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:31,214 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1004 transitions. [2022-01-31 18:27:31,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.0352941176470587) internal successors, (258), 84 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1004 transitions. [2022-01-31 18:27:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2022-01-31 18:27:31,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:31,217 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:31,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:27:31,217 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:31,217 INFO L85 PathProgramCache]: Analyzing trace with hash -557514390, now seen corresponding path program 82 times [2022-01-31 18:27:31,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:31,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265767419] [2022-01-31 18:27:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:31,219 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:31,219 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:31,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:31,235 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:33,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:33,464 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:33,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265767419] [2022-01-31 18:27:33,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1265767419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:33,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:33,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:27:33,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495498433] [2022-01-31 18:27:33,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:33,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:27:33,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:33,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:27:33,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:27:33,466 INFO L87 Difference]: Start difference. First operand 756 states and 1004 transitions. Second operand has 86 states, 86 states have (on average 3.0348837209302326) internal successors, (261), 85 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:38,623 INFO L93 Difference]: Finished difference Result 1028 states and 1285 transitions. [2022-01-31 18:27:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:27:38,623 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.0348837209302326) internal successors, (261), 85 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 670 [2022-01-31 18:27:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:38,625 INFO L225 Difference]: With dead ends: 1028 [2022-01-31 18:27:38,625 INFO L226 Difference]: Without dead ends: 771 [2022-01-31 18:27:38,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:27:38,627 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3767 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3768 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:38,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3768 Valid, 35 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:27:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-01-31 18:27:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 765. [2022-01-31 18:27:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 759 states have (on average 1.33201581027668) internal successors, (1011), 759 states have internal predecessors, (1011), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1016 transitions. [2022-01-31 18:27:38,888 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1016 transitions. Word has length 670 [2022-01-31 18:27:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:38,888 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 1016 transitions. [2022-01-31 18:27:38,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.0348837209302326) internal successors, (261), 85 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1016 transitions. [2022-01-31 18:27:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2022-01-31 18:27:38,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:38,891 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:38,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:27:38,891 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash -392123374, now seen corresponding path program 83 times [2022-01-31 18:27:38,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919175154] [2022-01-31 18:27:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:38,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:38,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:38,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:38,907 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:41,124 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 18:27:41,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:41,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919175154] [2022-01-31 18:27:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919175154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:41,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:41,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:27:41,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841131695] [2022-01-31 18:27:41,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:27:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:27:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:27:41,127 INFO L87 Difference]: Start difference. First operand 765 states and 1016 transitions. Second operand has 87 states, 87 states have (on average 3.0344827586206895) internal successors, (264), 86 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:45,911 INFO L93 Difference]: Finished difference Result 1040 states and 1300 transitions. [2022-01-31 18:27:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:27:45,912 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0344827586206895) internal successors, (264), 86 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 678 [2022-01-31 18:27:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:45,913 INFO L225 Difference]: With dead ends: 1040 [2022-01-31 18:27:45,913 INFO L226 Difference]: Without dead ends: 780 [2022-01-31 18:27:45,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:27:45,914 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3986 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3987 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:45,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3987 Valid, 45 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:27:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-31 18:27:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 774. [2022-01-31 18:27:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 768 states have (on average 1.33203125) internal successors, (1023), 768 states have internal predecessors, (1023), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1028 transitions. [2022-01-31 18:27:46,178 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1028 transitions. Word has length 678 [2022-01-31 18:27:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:46,178 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 1028 transitions. [2022-01-31 18:27:46,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0344827586206895) internal successors, (264), 86 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:46,178 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1028 transitions. [2022-01-31 18:27:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2022-01-31 18:27:46,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:46,181 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:46,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:27:46,181 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 295524714, now seen corresponding path program 84 times [2022-01-31 18:27:46,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:46,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672787736] [2022-01-31 18:27:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:46,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:46,184 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:46,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:46,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:48,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:48,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:48,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672787736] [2022-01-31 18:27:48,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [672787736] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:48,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:48,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:27:48,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711334975] [2022-01-31 18:27:48,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:48,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:27:48,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:48,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:27:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:27:48,551 INFO L87 Difference]: Start difference. First operand 774 states and 1028 transitions. Second operand has 88 states, 88 states have (on average 3.034090909090909) internal successors, (267), 87 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:53,368 INFO L93 Difference]: Finished difference Result 1052 states and 1315 transitions. [2022-01-31 18:27:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:27:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.034090909090909) internal successors, (267), 87 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 686 [2022-01-31 18:27:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:53,370 INFO L225 Difference]: With dead ends: 1052 [2022-01-31 18:27:53,370 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 18:27:53,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:27:53,372 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3077 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:53,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 70 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:27:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 18:27:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 783. [2022-01-31 18:27:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 777 states have (on average 1.332046332046332) internal successors, (1035), 777 states have internal predecessors, (1035), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1040 transitions. [2022-01-31 18:27:53,641 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1040 transitions. Word has length 686 [2022-01-31 18:27:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:53,642 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1040 transitions. [2022-01-31 18:27:53,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.034090909090909) internal successors, (267), 87 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1040 transitions. [2022-01-31 18:27:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2022-01-31 18:27:53,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:53,644 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:53,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:27:53,645 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1782004206, now seen corresponding path program 85 times [2022-01-31 18:27:53,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:53,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821813591] [2022-01-31 18:27:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:53,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:53,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:27:53,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:53,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:56,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:56,021 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 18:27:56,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:56,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821813591] [2022-01-31 18:27:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821813591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:56,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:56,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:27:56,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567287618] [2022-01-31 18:27:56,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:27:56,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:27:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:27:56,023 INFO L87 Difference]: Start difference. First operand 783 states and 1040 transitions. Second operand has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 88 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:00,977 INFO L93 Difference]: Finished difference Result 1064 states and 1330 transitions. [2022-01-31 18:28:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:28:00,978 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 88 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 694 [2022-01-31 18:28:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:00,979 INFO L225 Difference]: With dead ends: 1064 [2022-01-31 18:28:00,979 INFO L226 Difference]: Without dead ends: 798 [2022-01-31 18:28:00,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:28:00,981 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3520 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3521 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:00,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3521 Valid, 55 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:00,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-01-31 18:28:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 792. [2022-01-31 18:28:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 786 states have (on average 1.33206106870229) internal successors, (1047), 786 states have internal predecessors, (1047), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1052 transitions. [2022-01-31 18:28:01,284 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1052 transitions. Word has length 694 [2022-01-31 18:28:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:01,284 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1052 transitions. [2022-01-31 18:28:01,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.033707865168539) internal successors, (270), 88 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1052 transitions. [2022-01-31 18:28:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 703 [2022-01-31 18:28:01,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:01,287 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:01,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:28:01,287 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1354002794, now seen corresponding path program 86 times [2022-01-31 18:28:01,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:01,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855725002] [2022-01-31 18:28:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:01,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:01,289 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:01,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:01,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:03,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:03,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:03,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855725002] [2022-01-31 18:28:03,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [855725002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:03,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:03,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:28:03,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447243120] [2022-01-31 18:28:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:03,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:28:03,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:03,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:28:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:28:03,731 INFO L87 Difference]: Start difference. First operand 792 states and 1052 transitions. Second operand has 90 states, 90 states have (on average 3.033333333333333) internal successors, (273), 89 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:08,881 INFO L93 Difference]: Finished difference Result 1076 states and 1345 transitions. [2022-01-31 18:28:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:28:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.033333333333333) internal successors, (273), 89 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 702 [2022-01-31 18:28:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:08,883 INFO L225 Difference]: With dead ends: 1076 [2022-01-31 18:28:08,883 INFO L226 Difference]: Without dead ends: 807 [2022-01-31 18:28:08,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:28:08,885 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3499 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:08,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3500 Valid, 60 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-31 18:28:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 801. [2022-01-31 18:28:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 795 states have (on average 1.3320754716981131) internal successors, (1059), 795 states have internal predecessors, (1059), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1064 transitions. [2022-01-31 18:28:09,162 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1064 transitions. Word has length 702 [2022-01-31 18:28:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:09,162 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1064 transitions. [2022-01-31 18:28:09,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.033333333333333) internal successors, (273), 89 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1064 transitions. [2022-01-31 18:28:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 711 [2022-01-31 18:28:09,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:09,166 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:09,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:28:09,166 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:09,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash 68558866, now seen corresponding path program 87 times [2022-01-31 18:28:09,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:09,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969875042] [2022-01-31 18:28:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:09,170 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:09,170 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:09,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:09,185 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:11,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:11,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:11,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969875042] [2022-01-31 18:28:11,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1969875042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:11,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:11,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:28:11,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788284721] [2022-01-31 18:28:11,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:11,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:28:11,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:11,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:28:11,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:28:11,658 INFO L87 Difference]: Start difference. First operand 801 states and 1064 transitions. Second operand has 91 states, 91 states have (on average 3.032967032967033) internal successors, (276), 90 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:16,912 INFO L93 Difference]: Finished difference Result 1088 states and 1360 transitions. [2022-01-31 18:28:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:28:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.032967032967033) internal successors, (276), 90 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 710 [2022-01-31 18:28:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:16,913 INFO L225 Difference]: With dead ends: 1088 [2022-01-31 18:28:16,913 INFO L226 Difference]: Without dead ends: 816 [2022-01-31 18:28:16,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:28:16,915 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3622 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3623 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:16,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3623 Valid, 50 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-31 18:28:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 810. [2022-01-31 18:28:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 804 states have (on average 1.3320895522388059) internal successors, (1071), 804 states have internal predecessors, (1071), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1076 transitions. [2022-01-31 18:28:17,193 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1076 transitions. Word has length 710 [2022-01-31 18:28:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:17,193 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1076 transitions. [2022-01-31 18:28:17,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.032967032967033) internal successors, (276), 90 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1076 transitions. [2022-01-31 18:28:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 719 [2022-01-31 18:28:17,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:17,196 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:17,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:28:17,196 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1215973738, now seen corresponding path program 88 times [2022-01-31 18:28:17,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:17,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941903324] [2022-01-31 18:28:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:17,198 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:17,198 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:17,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:17,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:19,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:19,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:19,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941903324] [2022-01-31 18:28:19,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1941903324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:19,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:19,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:28:19,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933842263] [2022-01-31 18:28:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:19,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:28:19,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:28:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:28:19,662 INFO L87 Difference]: Start difference. First operand 810 states and 1076 transitions. Second operand has 92 states, 92 states have (on average 3.032608695652174) internal successors, (279), 91 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:24,956 INFO L93 Difference]: Finished difference Result 1100 states and 1375 transitions. [2022-01-31 18:28:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:28:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.032608695652174) internal successors, (279), 91 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 718 [2022-01-31 18:28:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:24,958 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 18:28:24,958 INFO L226 Difference]: Without dead ends: 825 [2022-01-31 18:28:24,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:28:24,960 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4257 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4258 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:24,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4258 Valid, 45 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-31 18:28:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 819. [2022-01-31 18:28:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 813 states have (on average 1.3321033210332103) internal successors, (1083), 813 states have internal predecessors, (1083), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:25,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1088 transitions. [2022-01-31 18:28:25,251 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1088 transitions. Word has length 718 [2022-01-31 18:28:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:25,252 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1088 transitions. [2022-01-31 18:28:25,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.032608695652174) internal successors, (279), 91 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1088 transitions. [2022-01-31 18:28:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2022-01-31 18:28:25,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:25,255 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:25,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:28:25,255 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1189561838, now seen corresponding path program 89 times [2022-01-31 18:28:25,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:25,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834926910] [2022-01-31 18:28:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:25,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:25,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:25,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:25,272 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:27,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:27,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:27,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834926910] [2022-01-31 18:28:27,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1834926910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:27,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:27,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:28:27,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126547496] [2022-01-31 18:28:27,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:27,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:28:27,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:27,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:28:27,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:28:27,803 INFO L87 Difference]: Start difference. First operand 819 states and 1088 transitions. Second operand has 93 states, 93 states have (on average 3.032258064516129) internal successors, (282), 92 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:33,428 INFO L93 Difference]: Finished difference Result 1112 states and 1390 transitions. [2022-01-31 18:28:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:28:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.032258064516129) internal successors, (282), 92 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 726 [2022-01-31 18:28:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:33,430 INFO L225 Difference]: With dead ends: 1112 [2022-01-31 18:28:33,430 INFO L226 Difference]: Without dead ends: 834 [2022-01-31 18:28:33,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:28:33,431 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3604 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3605 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:33,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3605 Valid, 65 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-01-31 18:28:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 828. [2022-01-31 18:28:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 822 states have (on average 1.332116788321168) internal successors, (1095), 822 states have internal predecessors, (1095), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1100 transitions. [2022-01-31 18:28:33,728 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1100 transitions. Word has length 726 [2022-01-31 18:28:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:33,729 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1100 transitions. [2022-01-31 18:28:33,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.032258064516129) internal successors, (282), 92 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1100 transitions. [2022-01-31 18:28:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2022-01-31 18:28:33,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:33,732 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:33,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:28:33,732 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1856052886, now seen corresponding path program 90 times [2022-01-31 18:28:33,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:33,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706492992] [2022-01-31 18:28:33,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:33,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:33,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:33,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:33,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:36,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:36,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:36,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706492992] [2022-01-31 18:28:36,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1706492992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:36,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:36,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:28:36,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523524635] [2022-01-31 18:28:36,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:36,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:28:36,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:28:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:28:36,330 INFO L87 Difference]: Start difference. First operand 828 states and 1100 transitions. Second operand has 94 states, 94 states have (on average 3.0319148936170213) internal successors, (285), 93 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:41,978 INFO L93 Difference]: Finished difference Result 1124 states and 1405 transitions. [2022-01-31 18:28:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:28:41,978 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.0319148936170213) internal successors, (285), 93 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 734 [2022-01-31 18:28:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:41,980 INFO L225 Difference]: With dead ends: 1124 [2022-01-31 18:28:41,980 INFO L226 Difference]: Without dead ends: 843 [2022-01-31 18:28:41,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:28:41,982 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3703 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3704 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:41,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3704 Valid, 55 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:28:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-31 18:28:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 837. [2022-01-31 18:28:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 831 states have (on average 1.332129963898917) internal successors, (1107), 831 states have internal predecessors, (1107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1112 transitions. [2022-01-31 18:28:42,306 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1112 transitions. Word has length 734 [2022-01-31 18:28:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:42,306 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1112 transitions. [2022-01-31 18:28:42,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.0319148936170213) internal successors, (285), 93 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1112 transitions. [2022-01-31 18:28:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 743 [2022-01-31 18:28:42,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:42,310 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:42,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:28:42,310 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:42,310 INFO L85 PathProgramCache]: Analyzing trace with hash -832531438, now seen corresponding path program 91 times [2022-01-31 18:28:42,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:42,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296540953] [2022-01-31 18:28:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:42,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:42,313 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:42,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:42,330 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:44,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:44,998 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296540953] [2022-01-31 18:28:44,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1296540953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:44,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:44,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:28:44,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756855159] [2022-01-31 18:28:44,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:28:44,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:44,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:28:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:28:45,001 INFO L87 Difference]: Start difference. First operand 837 states and 1112 transitions. Second operand has 95 states, 95 states have (on average 3.031578947368421) internal successors, (288), 94 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:50,968 INFO L93 Difference]: Finished difference Result 1136 states and 1420 transitions. [2022-01-31 18:28:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:28:50,969 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.031578947368421) internal successors, (288), 94 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 742 [2022-01-31 18:28:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:50,970 INFO L225 Difference]: With dead ends: 1136 [2022-01-31 18:28:50,970 INFO L226 Difference]: Without dead ends: 852 [2022-01-31 18:28:50,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:28:50,972 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3770 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:50,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3771 Valid, 50 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:28:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-01-31 18:28:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 846. [2022-01-31 18:28:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 840 states have (on average 1.332142857142857) internal successors, (1119), 840 states have internal predecessors, (1119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1124 transitions. [2022-01-31 18:28:51,289 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1124 transitions. Word has length 742 [2022-01-31 18:28:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:51,289 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1124 transitions. [2022-01-31 18:28:51,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.031578947368421) internal successors, (288), 94 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1124 transitions. [2022-01-31 18:28:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2022-01-31 18:28:51,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:51,293 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:51,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:28:51,293 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1345177238, now seen corresponding path program 92 times [2022-01-31 18:28:51,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:51,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131694023] [2022-01-31 18:28:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:51,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:51,296 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:28:51,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:51,314 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:54,000 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:54,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131694023] [2022-01-31 18:28:54,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [131694023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:54,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:54,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:28:54,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959720889] [2022-01-31 18:28:54,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:54,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:28:54,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:54,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:28:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:28:54,002 INFO L87 Difference]: Start difference. First operand 846 states and 1124 transitions. Second operand has 96 states, 96 states have (on average 3.03125) internal successors, (291), 95 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:59,980 INFO L93 Difference]: Finished difference Result 1148 states and 1435 transitions. [2022-01-31 18:28:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:28:59,980 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.03125) internal successors, (291), 95 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 750 [2022-01-31 18:28:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:59,981 INFO L225 Difference]: With dead ends: 1148 [2022-01-31 18:28:59,981 INFO L226 Difference]: Without dead ends: 861 [2022-01-31 18:28:59,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:28:59,983 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4405 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4406 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:59,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4406 Valid, 50 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:28:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-31 18:29:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 855. [2022-01-31 18:29:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 849 states have (on average 1.332155477031802) internal successors, (1131), 849 states have internal predecessors, (1131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1136 transitions. [2022-01-31 18:29:00,302 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1136 transitions. Word has length 750 [2022-01-31 18:29:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:00,302 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1136 transitions. [2022-01-31 18:29:00,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.03125) internal successors, (291), 95 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1136 transitions. [2022-01-31 18:29:00,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2022-01-31 18:29:00,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:00,306 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:00,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:29:00,306 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash -243421678, now seen corresponding path program 93 times [2022-01-31 18:29:00,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:00,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949775566] [2022-01-31 18:29:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:00,309 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:00,309 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:00,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:00,326 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:03,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:03,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:03,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949775566] [2022-01-31 18:29:03,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [949775566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:03,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:03,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:29:03,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729650474] [2022-01-31 18:29:03,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:03,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:29:03,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:03,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:29:03,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:29:03,088 INFO L87 Difference]: Start difference. First operand 855 states and 1136 transitions. Second operand has 97 states, 97 states have (on average 3.0309278350515463) internal successors, (294), 96 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:09,089 INFO L93 Difference]: Finished difference Result 1160 states and 1450 transitions. [2022-01-31 18:29:09,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:29:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0309278350515463) internal successors, (294), 96 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 758 [2022-01-31 18:29:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:09,094 INFO L225 Difference]: With dead ends: 1160 [2022-01-31 18:29:09,094 INFO L226 Difference]: Without dead ends: 870 [2022-01-31 18:29:09,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:29:09,096 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4536 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4537 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:09,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4537 Valid, 40 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-31 18:29:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 864. [2022-01-31 18:29:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.332167832167832) internal successors, (1143), 858 states have internal predecessors, (1143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1148 transitions. [2022-01-31 18:29:09,441 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1148 transitions. Word has length 758 [2022-01-31 18:29:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:09,442 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1148 transitions. [2022-01-31 18:29:09,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0309278350515463) internal successors, (294), 96 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1148 transitions. [2022-01-31 18:29:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2022-01-31 18:29:09,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:09,445 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:09,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:29:09,445 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash 340021610, now seen corresponding path program 94 times [2022-01-31 18:29:09,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:09,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559755213] [2022-01-31 18:29:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:09,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:09,448 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:09,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:09,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:12,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:12,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:12,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559755213] [2022-01-31 18:29:12,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [559755213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:12,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:12,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:29:12,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623224577] [2022-01-31 18:29:12,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:12,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:29:12,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:29:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:29:12,233 INFO L87 Difference]: Start difference. First operand 864 states and 1148 transitions. Second operand has 98 states, 98 states have (on average 3.0306122448979593) internal successors, (297), 97 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:18,432 INFO L93 Difference]: Finished difference Result 1172 states and 1465 transitions. [2022-01-31 18:29:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:29:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.0306122448979593) internal successors, (297), 97 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 766 [2022-01-31 18:29:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:18,435 INFO L225 Difference]: With dead ends: 1172 [2022-01-31 18:29:18,435 INFO L226 Difference]: Without dead ends: 879 [2022-01-31 18:29:18,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:29:18,437 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4411 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4412 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:18,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4412 Valid, 50 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [615 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-31 18:29:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 873. [2022-01-31 18:29:18,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 867 states have (on average 1.3321799307958477) internal successors, (1155), 867 states have internal predecessors, (1155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1160 transitions. [2022-01-31 18:29:18,780 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1160 transitions. Word has length 766 [2022-01-31 18:29:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:18,781 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1160 transitions. [2022-01-31 18:29:18,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.0306122448979593) internal successors, (297), 97 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1160 transitions. [2022-01-31 18:29:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2022-01-31 18:29:18,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:18,784 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:18,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:29:18,784 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1677723666, now seen corresponding path program 95 times [2022-01-31 18:29:18,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249917153] [2022-01-31 18:29:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:18,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:18,787 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:18,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:18,808 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:21,672 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 18:29:21,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:21,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249917153] [2022-01-31 18:29:21,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1249917153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:21,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:21,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:29:21,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073079635] [2022-01-31 18:29:21,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:21,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:29:21,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:21,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:29:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:29:21,675 INFO L87 Difference]: Start difference. First operand 873 states and 1160 transitions. Second operand has 99 states, 99 states have (on average 3.0303030303030303) internal successors, (300), 98 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:28,169 INFO L93 Difference]: Finished difference Result 1184 states and 1480 transitions. [2022-01-31 18:29:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:29:28,170 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.0303030303030303) internal successors, (300), 98 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 774 [2022-01-31 18:29:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:28,171 INFO L225 Difference]: With dead ends: 1184 [2022-01-31 18:29:28,171 INFO L226 Difference]: Without dead ends: 888 [2022-01-31 18:29:28,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:29:28,173 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4222 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4223 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:28,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4223 Valid, 55 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-31 18:29:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 882. [2022-01-31 18:29:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 876 states have (on average 1.332191780821918) internal successors, (1167), 876 states have internal predecessors, (1167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1172 transitions. [2022-01-31 18:29:28,507 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1172 transitions. Word has length 774 [2022-01-31 18:29:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:28,507 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1172 transitions. [2022-01-31 18:29:28,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.0303030303030303) internal successors, (300), 98 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1172 transitions. [2022-01-31 18:29:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-01-31 18:29:28,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:28,511 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:28,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:29:28,511 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash 455420266, now seen corresponding path program 96 times [2022-01-31 18:29:28,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:28,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433931260] [2022-01-31 18:29:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:28,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:28,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:28,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:28,537 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:31,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:31,463 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 18:29:31,463 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:31,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433931260] [2022-01-31 18:29:31,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1433931260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:31,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:31,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:29:31,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645669598] [2022-01-31 18:29:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:31,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:29:31,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:31,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:29:31,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:29:31,465 INFO L87 Difference]: Start difference. First operand 882 states and 1172 transitions. Second operand has 100 states, 100 states have (on average 3.03) internal successors, (303), 99 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:38,031 INFO L93 Difference]: Finished difference Result 1196 states and 1495 transitions. [2022-01-31 18:29:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:29:38,031 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.03) internal successors, (303), 99 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 782 [2022-01-31 18:29:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:38,032 INFO L225 Difference]: With dead ends: 1196 [2022-01-31 18:29:38,032 INFO L226 Difference]: Without dead ends: 897 [2022-01-31 18:29:38,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:29:38,034 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4033 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4034 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:38,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4034 Valid, 50 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-31 18:29:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 891. [2022-01-31 18:29:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 885 states have (on average 1.3322033898305086) internal successors, (1179), 885 states have internal predecessors, (1179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1184 transitions. [2022-01-31 18:29:38,378 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1184 transitions. Word has length 782 [2022-01-31 18:29:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:38,378 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1184 transitions. [2022-01-31 18:29:38,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.03) internal successors, (303), 99 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1184 transitions. [2022-01-31 18:29:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-01-31 18:29:38,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:38,381 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:38,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:29:38,382 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -76045806, now seen corresponding path program 97 times [2022-01-31 18:29:38,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:38,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443952591] [2022-01-31 18:29:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:38,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:38,384 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:38,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:38,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:41,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:41,485 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 18:29:41,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:41,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443952591] [2022-01-31 18:29:41,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [443952591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:41,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:41,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:29:41,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694240629] [2022-01-31 18:29:41,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:41,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:29:41,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:41,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:29:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:29:41,488 INFO L87 Difference]: Start difference. First operand 891 states and 1184 transitions. Second operand has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 100 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:48,179 INFO L93 Difference]: Finished difference Result 1208 states and 1510 transitions. [2022-01-31 18:29:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:29:48,179 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 100 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 790 [2022-01-31 18:29:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:48,180 INFO L225 Difference]: With dead ends: 1208 [2022-01-31 18:29:48,180 INFO L226 Difference]: Without dead ends: 906 [2022-01-31 18:29:48,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:29:48,182 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3860 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3861 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:48,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3861 Valid, 60 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-01-31 18:29:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 900. [2022-01-31 18:29:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 894 states have (on average 1.332214765100671) internal successors, (1191), 894 states have internal predecessors, (1191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1196 transitions. [2022-01-31 18:29:48,530 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1196 transitions. Word has length 790 [2022-01-31 18:29:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:48,531 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 1196 transitions. [2022-01-31 18:29:48,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.0297029702970297) internal successors, (306), 100 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1196 transitions. [2022-01-31 18:29:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 799 [2022-01-31 18:29:48,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:48,534 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:48,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:29:48,535 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:48,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:48,535 INFO L85 PathProgramCache]: Analyzing trace with hash 216318314, now seen corresponding path program 98 times [2022-01-31 18:29:48,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:48,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250194862] [2022-01-31 18:29:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:48,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:48,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:48,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:48,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:51,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:51,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250194862] [2022-01-31 18:29:51,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [250194862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:51,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:51,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:29:51,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560934935] [2022-01-31 18:29:51,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:51,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:29:51,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:29:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:29:51,612 INFO L87 Difference]: Start difference. First operand 900 states and 1196 transitions. Second operand has 102 states, 102 states have (on average 3.0294117647058822) internal successors, (309), 101 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:58,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:58,364 INFO L93 Difference]: Finished difference Result 1220 states and 1525 transitions. [2022-01-31 18:29:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:29:58,364 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.0294117647058822) internal successors, (309), 101 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 798 [2022-01-31 18:29:58,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:58,371 INFO L225 Difference]: With dead ends: 1220 [2022-01-31 18:29:58,371 INFO L226 Difference]: Without dead ends: 915 [2022-01-31 18:29:58,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 18:29:58,373 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4319 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4320 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:58,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4320 Valid, 40 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:29:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-01-31 18:29:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 909. [2022-01-31 18:29:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 903 states have (on average 1.3322259136212624) internal successors, (1203), 903 states have internal predecessors, (1203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1208 transitions. [2022-01-31 18:29:58,743 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1208 transitions. Word has length 798 [2022-01-31 18:29:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:58,744 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1208 transitions. [2022-01-31 18:29:58,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.0294117647058822) internal successors, (309), 101 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1208 transitions. [2022-01-31 18:29:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2022-01-31 18:29:58,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:58,747 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:58,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:29:58,747 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash 561282066, now seen corresponding path program 99 times [2022-01-31 18:29:58,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072080476] [2022-01-31 18:29:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:58,750 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:58,750 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:29:58,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:58,770 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:01,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:01,840 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 18:30:01,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072080476] [2022-01-31 18:30:01,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1072080476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:01,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:01,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 18:30:01,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530079885] [2022-01-31 18:30:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:01,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 18:30:01,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 18:30:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:30:01,843 INFO L87 Difference]: Start difference. First operand 909 states and 1208 transitions. Second operand has 103 states, 103 states have (on average 3.029126213592233) internal successors, (312), 102 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:09,194 INFO L93 Difference]: Finished difference Result 1232 states and 1540 transitions. [2022-01-31 18:30:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 18:30:09,194 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.029126213592233) internal successors, (312), 102 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 806 [2022-01-31 18:30:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:09,196 INFO L225 Difference]: With dead ends: 1232 [2022-01-31 18:30:09,196 INFO L226 Difference]: Without dead ends: 924 [2022-01-31 18:30:09,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 18:30:09,198 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4170 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4171 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:09,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4171 Valid, 55 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-31 18:30:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 918. [2022-01-31 18:30:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.332236842105263) internal successors, (1215), 912 states have internal predecessors, (1215), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1220 transitions. [2022-01-31 18:30:09,572 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1220 transitions. Word has length 806 [2022-01-31 18:30:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:09,573 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1220 transitions. [2022-01-31 18:30:09,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.029126213592233) internal successors, (312), 102 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1220 transitions. [2022-01-31 18:30:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2022-01-31 18:30:09,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:09,578 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:09,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 18:30:09,578 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 502471018, now seen corresponding path program 100 times [2022-01-31 18:30:09,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:09,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757109065] [2022-01-31 18:30:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:09,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:09,581 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:09,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:09,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:12,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:12,754 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 18:30:12,754 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757109065] [2022-01-31 18:30:12,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1757109065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:12,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:12,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 18:30:12,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976382106] [2022-01-31 18:30:12,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:12,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 18:30:12,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 18:30:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 18:30:12,757 INFO L87 Difference]: Start difference. First operand 918 states and 1220 transitions. Second operand has 104 states, 104 states have (on average 3.0288461538461537) internal successors, (315), 103 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:19,812 INFO L93 Difference]: Finished difference Result 1244 states and 1555 transitions. [2022-01-31 18:30:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 18:30:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.0288461538461537) internal successors, (315), 103 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 814 [2022-01-31 18:30:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:19,814 INFO L225 Difference]: With dead ends: 1244 [2022-01-31 18:30:19,814 INFO L226 Difference]: Without dead ends: 933 [2022-01-31 18:30:19,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 18:30:19,816 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4037 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4038 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:19,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4038 Valid, 50 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:30:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-31 18:30:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 927. [2022-01-31 18:30:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 921 states have (on average 1.3322475570032573) internal successors, (1227), 921 states have internal predecessors, (1227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1232 transitions. [2022-01-31 18:30:20,186 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1232 transitions. Word has length 814 [2022-01-31 18:30:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:20,186 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1232 transitions. [2022-01-31 18:30:20,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.0288461538461537) internal successors, (315), 103 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1232 transitions. [2022-01-31 18:30:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2022-01-31 18:30:20,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:20,190 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:20,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 18:30:20,190 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:20,190 INFO L85 PathProgramCache]: Analyzing trace with hash -746154478, now seen corresponding path program 101 times [2022-01-31 18:30:20,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:20,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187879163] [2022-01-31 18:30:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:20,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:20,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:20,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:20,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:23,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:23,388 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 18:30:23,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:23,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187879163] [2022-01-31 18:30:23,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [187879163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:23,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:23,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 18:30:23,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336851378] [2022-01-31 18:30:23,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:23,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 18:30:23,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 18:30:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:30:23,391 INFO L87 Difference]: Start difference. First operand 927 states and 1232 transitions. Second operand has 105 states, 105 states have (on average 3.0285714285714285) internal successors, (318), 104 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:30,647 INFO L93 Difference]: Finished difference Result 1256 states and 1570 transitions. [2022-01-31 18:30:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 18:30:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.0285714285714285) internal successors, (318), 104 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 822 [2022-01-31 18:30:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:30,648 INFO L225 Difference]: With dead ends: 1256 [2022-01-31 18:30:30,649 INFO L226 Difference]: Without dead ends: 942 [2022-01-31 18:30:30,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 18:30:30,651 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4656 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4657 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:30,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4657 Valid, 45 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:30:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-01-31 18:30:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 936. [2022-01-31 18:30:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 930 states have (on average 1.332258064516129) internal successors, (1239), 930 states have internal predecessors, (1239), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1244 transitions. [2022-01-31 18:30:31,025 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1244 transitions. Word has length 822 [2022-01-31 18:30:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:31,025 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1244 transitions. [2022-01-31 18:30:31,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.0285714285714285) internal successors, (318), 104 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1244 transitions. [2022-01-31 18:30:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2022-01-31 18:30:31,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:31,029 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:31,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 18:30:31,029 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:31,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1858089322, now seen corresponding path program 102 times [2022-01-31 18:30:31,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:31,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639867521] [2022-01-31 18:30:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:31,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:31,031 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:31,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:31,053 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:34,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:30:34,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:34,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639867521] [2022-01-31 18:30:34,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1639867521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:34,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:34,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 18:30:34,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328554329] [2022-01-31 18:30:34,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:34,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 18:30:34,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:34,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 18:30:34,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 18:30:34,413 INFO L87 Difference]: Start difference. First operand 936 states and 1244 transitions. Second operand has 106 states, 106 states have (on average 3.0283018867924527) internal successors, (321), 105 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:42,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:42,087 INFO L93 Difference]: Finished difference Result 1268 states and 1585 transitions. [2022-01-31 18:30:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 18:30:42,087 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.0283018867924527) internal successors, (321), 105 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 830 [2022-01-31 18:30:42,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:42,099 INFO L225 Difference]: With dead ends: 1268 [2022-01-31 18:30:42,100 INFO L226 Difference]: Without dead ends: 951 [2022-01-31 18:30:42,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 18:30:42,102 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4451 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4452 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:42,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4452 Valid, 55 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:30:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-31 18:30:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 945. [2022-01-31 18:30:42,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 939 states have (on average 1.3322683706070289) internal successors, (1251), 939 states have internal predecessors, (1251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1256 transitions. [2022-01-31 18:30:42,531 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1256 transitions. Word has length 830 [2022-01-31 18:30:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:42,531 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1256 transitions. [2022-01-31 18:30:42,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.0283018867924527) internal successors, (321), 105 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:42,531 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1256 transitions. [2022-01-31 18:30:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2022-01-31 18:30:42,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:42,534 INFO L514 BasicCegarLoop]: trace histogram [104, 103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:42,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 18:30:42,535 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1556221934, now seen corresponding path program 103 times [2022-01-31 18:30:42,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:42,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876620984] [2022-01-31 18:30:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:42,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:42,537 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:42,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:42,558 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:45,854 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 18:30:45,855 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876620984] [2022-01-31 18:30:45,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876620984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:45,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:45,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 18:30:45,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213404636] [2022-01-31 18:30:45,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:45,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 18:30:45,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 18:30:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:30:45,858 INFO L87 Difference]: Start difference. First operand 945 states and 1256 transitions. Second operand has 107 states, 107 states have (on average 3.02803738317757) internal successors, (324), 106 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:53,912 INFO L93 Difference]: Finished difference Result 1280 states and 1600 transitions. [2022-01-31 18:30:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 18:30:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.02803738317757) internal successors, (324), 106 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 838 [2022-01-31 18:30:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:53,914 INFO L225 Difference]: With dead ends: 1280 [2022-01-31 18:30:53,914 INFO L226 Difference]: Without dead ends: 960 [2022-01-31 18:30:53,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 18:30:53,916 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4510 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4511 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:53,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4511 Valid, 45 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:30:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-31 18:30:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 954. [2022-01-31 18:30:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 948 states have (on average 1.3322784810126582) internal successors, (1263), 948 states have internal predecessors, (1263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1268 transitions. [2022-01-31 18:30:54,309 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1268 transitions. Word has length 838 [2022-01-31 18:30:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:54,309 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1268 transitions. [2022-01-31 18:30:54,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.02803738317757) internal successors, (324), 106 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1268 transitions. [2022-01-31 18:30:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2022-01-31 18:30:54,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:54,313 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:54,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 18:30:54,313 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:54,313 INFO L85 PathProgramCache]: Analyzing trace with hash 196872554, now seen corresponding path program 104 times [2022-01-31 18:30:54,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:54,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481558505] [2022-01-31 18:30:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:54,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:54,315 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:30:54,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:54,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:57,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:30:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:30:57,738 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 18:30:57,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:30:57,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481558505] [2022-01-31 18:30:57,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481558505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:30:57,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:30:57,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 18:30:57,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559888830] [2022-01-31 18:30:57,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:30:57,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 18:30:57,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:30:57,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 18:30:57,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 18:30:57,741 INFO L87 Difference]: Start difference. First operand 954 states and 1268 transitions. Second operand has 108 states, 108 states have (on average 3.0277777777777777) internal successors, (327), 107 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:05,776 INFO L93 Difference]: Finished difference Result 1292 states and 1615 transitions. [2022-01-31 18:31:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 18:31:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.0277777777777777) internal successors, (327), 107 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 846 [2022-01-31 18:31:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:05,777 INFO L225 Difference]: With dead ends: 1292 [2022-01-31 18:31:05,777 INFO L226 Difference]: Without dead ends: 969 [2022-01-31 18:31:05,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 18:31:05,780 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4481 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4482 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:05,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4482 Valid, 45 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:31:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-31 18:31:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 963. [2022-01-31 18:31:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 957 states have (on average 1.3322884012539185) internal successors, (1275), 957 states have internal predecessors, (1275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1280 transitions. [2022-01-31 18:31:06,186 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1280 transitions. Word has length 846 [2022-01-31 18:31:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:06,186 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1280 transitions. [2022-01-31 18:31:06,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.0277777777777777) internal successors, (327), 107 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1280 transitions. [2022-01-31 18:31:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2022-01-31 18:31:06,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:06,190 INFO L514 BasicCegarLoop]: trace histogram [106, 105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:06,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 18:31:06,190 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1238726126, now seen corresponding path program 105 times [2022-01-31 18:31:06,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:06,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292146755] [2022-01-31 18:31:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:06,192 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:06,192 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:06,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:06,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:09,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:09,594 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 18:31:09,594 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292146755] [2022-01-31 18:31:09,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [292146755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:09,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:09,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 18:31:09,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354304431] [2022-01-31 18:31:09,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:09,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 18:31:09,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 18:31:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:31:09,598 INFO L87 Difference]: Start difference. First operand 963 states and 1280 transitions. Second operand has 109 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 108 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:17,599 INFO L93 Difference]: Finished difference Result 1304 states and 1630 transitions. [2022-01-31 18:31:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 18:31:17,599 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 108 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 854 [2022-01-31 18:31:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:17,601 INFO L225 Difference]: With dead ends: 1304 [2022-01-31 18:31:17,601 INFO L226 Difference]: Without dead ends: 978 [2022-01-31 18:31:17,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 18:31:17,603 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4732 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4733 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:17,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4733 Valid, 45 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:31:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-31 18:31:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 972. [2022-01-31 18:31:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 966 states have (on average 1.3322981366459627) internal successors, (1287), 966 states have internal predecessors, (1287), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1292 transitions. [2022-01-31 18:31:18,010 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1292 transitions. Word has length 854 [2022-01-31 18:31:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:18,010 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1292 transitions. [2022-01-31 18:31:18,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.0275229357798166) internal successors, (330), 108 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1292 transitions. [2022-01-31 18:31:18,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 863 [2022-01-31 18:31:18,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:18,014 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:18,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 18:31:18,014 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash -313089686, now seen corresponding path program 106 times [2022-01-31 18:31:18,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:18,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747692250] [2022-01-31 18:31:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:18,018 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:18,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:18,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:18,041 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:21,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:21,603 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 18:31:21,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:21,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747692250] [2022-01-31 18:31:21,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747692250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:21,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:21,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 18:31:21,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381667058] [2022-01-31 18:31:21,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:21,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 18:31:21,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 18:31:21,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 18:31:21,606 INFO L87 Difference]: Start difference. First operand 972 states and 1292 transitions. Second operand has 110 states, 110 states have (on average 3.0272727272727273) internal successors, (333), 109 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:29,739 INFO L93 Difference]: Finished difference Result 1316 states and 1645 transitions. [2022-01-31 18:31:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 18:31:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.0272727272727273) internal successors, (333), 109 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 862 [2022-01-31 18:31:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:29,741 INFO L225 Difference]: With dead ends: 1316 [2022-01-31 18:31:29,741 INFO L226 Difference]: Without dead ends: 987 [2022-01-31 18:31:29,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 18:31:29,744 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4895 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4896 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:29,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4896 Valid, 45 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:31:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-01-31 18:31:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 981. [2022-01-31 18:31:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 975 states have (on average 1.3323076923076924) internal successors, (1299), 975 states have internal predecessors, (1299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1304 transitions. [2022-01-31 18:31:30,179 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1304 transitions. Word has length 862 [2022-01-31 18:31:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:30,180 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1304 transitions. [2022-01-31 18:31:30,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.0272727272727273) internal successors, (333), 109 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1304 transitions. [2022-01-31 18:31:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2022-01-31 18:31:30,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:30,184 INFO L514 BasicCegarLoop]: trace histogram [108, 107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:30,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 18:31:30,184 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -975412206, now seen corresponding path program 107 times [2022-01-31 18:31:30,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:30,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069068861] [2022-01-31 18:31:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:30,186 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:30,186 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:30,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:30,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:33,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:33,828 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 18:31:33,828 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:33,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069068861] [2022-01-31 18:31:33,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069068861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:33,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:33,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 18:31:33,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441064077] [2022-01-31 18:31:33,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:33,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 18:31:33,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 18:31:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:31:33,831 INFO L87 Difference]: Start difference. First operand 981 states and 1304 transitions. Second operand has 111 states, 111 states have (on average 3.027027027027027) internal successors, (336), 110 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:42,581 INFO L93 Difference]: Finished difference Result 1328 states and 1660 transitions. [2022-01-31 18:31:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 18:31:42,581 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 3.027027027027027) internal successors, (336), 110 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 870 [2022-01-31 18:31:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:42,583 INFO L225 Difference]: With dead ends: 1328 [2022-01-31 18:31:42,583 INFO L226 Difference]: Without dead ends: 996 [2022-01-31 18:31:42,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 18:31:42,585 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4986 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4987 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:42,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4987 Valid, 50 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:31:42,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-31 18:31:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2022-01-31 18:31:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 984 states have (on average 1.3323170731707317) internal successors, (1311), 984 states have internal predecessors, (1311), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1316 transitions. [2022-01-31 18:31:43,016 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1316 transitions. Word has length 870 [2022-01-31 18:31:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:43,017 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1316 transitions. [2022-01-31 18:31:43,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 3.027027027027027) internal successors, (336), 110 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1316 transitions. [2022-01-31 18:31:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-01-31 18:31:43,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:43,021 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:43,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 18:31:43,021 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash -134219414, now seen corresponding path program 108 times [2022-01-31 18:31:43,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:43,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5558626] [2022-01-31 18:31:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:43,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:43,023 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:43,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:43,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:46,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:31:46,779 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5558626] [2022-01-31 18:31:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [5558626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:46,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:46,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 18:31:46,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141752811] [2022-01-31 18:31:46,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:46,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 18:31:46,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 18:31:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 18:31:46,783 INFO L87 Difference]: Start difference. First operand 990 states and 1316 transitions. Second operand has 112 states, 112 states have (on average 3.0267857142857144) internal successors, (339), 111 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:31:55,814 INFO L93 Difference]: Finished difference Result 1340 states and 1675 transitions. [2022-01-31 18:31:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 18:31:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.0267857142857144) internal successors, (339), 111 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 878 [2022-01-31 18:31:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:31:55,816 INFO L225 Difference]: With dead ends: 1340 [2022-01-31 18:31:55,816 INFO L226 Difference]: Without dead ends: 1005 [2022-01-31 18:31:55,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 18:31:55,818 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4741 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4742 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:31:55,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4742 Valid, 55 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:31:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-31 18:31:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 999. [2022-01-31 18:31:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 993 states have (on average 1.3323262839879153) internal successors, (1323), 993 states have internal predecessors, (1323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:31:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1328 transitions. [2022-01-31 18:31:56,254 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1328 transitions. Word has length 878 [2022-01-31 18:31:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:31:56,255 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 1328 transitions. [2022-01-31 18:31:56,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.0267857142857144) internal successors, (339), 111 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:31:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1328 transitions. [2022-01-31 18:31:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2022-01-31 18:31:56,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:31:56,258 INFO L514 BasicCegarLoop]: trace histogram [110, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:31:56,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 18:31:56,259 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:31:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:31:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash 535002642, now seen corresponding path program 109 times [2022-01-31 18:31:56,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:31:56,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196471383] [2022-01-31 18:31:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:31:56,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:31:56,261 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:31:56,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:31:56,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:31:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:00,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:00,144 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 18:32:00,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:00,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196471383] [2022-01-31 18:32:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [196471383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:00,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:00,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 18:32:00,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701839740] [2022-01-31 18:32:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 18:32:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 18:32:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:32:00,147 INFO L87 Difference]: Start difference. First operand 999 states and 1328 transitions. Second operand has 113 states, 113 states have (on average 3.0265486725663715) internal successors, (342), 112 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:09,085 INFO L93 Difference]: Finished difference Result 1352 states and 1690 transitions. [2022-01-31 18:32:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 18:32:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.0265486725663715) internal successors, (342), 112 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 886 [2022-01-31 18:32:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:09,087 INFO L225 Difference]: With dead ends: 1352 [2022-01-31 18:32:09,087 INFO L226 Difference]: Without dead ends: 1014 [2022-01-31 18:32:09,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 18:32:09,089 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4768 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4769 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:09,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4769 Valid, 60 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:32:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-01-31 18:32:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 1008. [2022-01-31 18:32:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1002 states have (on average 1.3323353293413174) internal successors, (1335), 1002 states have internal predecessors, (1335), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1340 transitions. [2022-01-31 18:32:09,530 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1340 transitions. Word has length 886 [2022-01-31 18:32:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:09,530 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1340 transitions. [2022-01-31 18:32:09,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.0265486725663715) internal successors, (342), 112 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1340 transitions. [2022-01-31 18:32:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 895 [2022-01-31 18:32:09,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:09,535 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:09,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 18:32:09,535 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -64482966, now seen corresponding path program 110 times [2022-01-31 18:32:09,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:09,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838674914] [2022-01-31 18:32:09,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:09,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:09,538 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:09,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:09,574 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:13,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:32:13,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838674914] [2022-01-31 18:32:13,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [838674914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:13,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:13,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 18:32:13,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168588988] [2022-01-31 18:32:13,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:13,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 18:32:13,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 18:32:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 18:32:13,368 INFO L87 Difference]: Start difference. First operand 1008 states and 1340 transitions. Second operand has 114 states, 114 states have (on average 3.026315789473684) internal successors, (345), 113 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:22,848 INFO L93 Difference]: Finished difference Result 1364 states and 1705 transitions. [2022-01-31 18:32:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 18:32:22,848 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.026315789473684) internal successors, (345), 113 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 894 [2022-01-31 18:32:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:22,849 INFO L225 Difference]: With dead ends: 1364 [2022-01-31 18:32:22,849 INFO L226 Difference]: Without dead ends: 1023 [2022-01-31 18:32:22,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 18:32:22,854 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5003 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5004 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 698 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:22,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5004 Valid, 50 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [698 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:32:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-31 18:32:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1017. [2022-01-31 18:32:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1011 states have (on average 1.3323442136498516) internal successors, (1347), 1011 states have internal predecessors, (1347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1352 transitions. [2022-01-31 18:32:23,325 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1352 transitions. Word has length 894 [2022-01-31 18:32:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:23,326 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 1352 transitions. [2022-01-31 18:32:23,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.026315789473684) internal successors, (345), 113 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1352 transitions. [2022-01-31 18:32:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2022-01-31 18:32:23,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:23,330 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:23,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 18:32:23,330 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1513105390, now seen corresponding path program 111 times [2022-01-31 18:32:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124639088] [2022-01-31 18:32:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:23,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:23,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:23,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:23,370 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:27,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:27,299 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 18:32:27,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:27,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124639088] [2022-01-31 18:32:27,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1124639088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:27,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:27,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 18:32:27,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149416519] [2022-01-31 18:32:27,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:27,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 18:32:27,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 18:32:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:32:27,304 INFO L87 Difference]: Start difference. First operand 1017 states and 1352 transitions. Second operand has 115 states, 115 states have (on average 3.026086956521739) internal successors, (348), 114 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:36,974 INFO L93 Difference]: Finished difference Result 1376 states and 1720 transitions. [2022-01-31 18:32:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 18:32:36,974 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.026086956521739) internal successors, (348), 114 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 902 [2022-01-31 18:32:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:36,976 INFO L225 Difference]: With dead ends: 1376 [2022-01-31 18:32:36,976 INFO L226 Difference]: Without dead ends: 1032 [2022-01-31 18:32:36,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 18:32:36,980 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4366 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4367 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:36,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4367 Valid, 55 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:32:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-31 18:32:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1026. [2022-01-31 18:32:37,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1020 states have (on average 1.3323529411764705) internal successors, (1359), 1020 states have internal predecessors, (1359), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1364 transitions. [2022-01-31 18:32:37,447 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1364 transitions. Word has length 902 [2022-01-31 18:32:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:37,448 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1364 transitions. [2022-01-31 18:32:37,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.026086956521739) internal successors, (348), 114 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1364 transitions. [2022-01-31 18:32:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2022-01-31 18:32:37,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:37,466 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:37,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 18:32:37,466 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1237390998, now seen corresponding path program 112 times [2022-01-31 18:32:37,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:37,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516883850] [2022-01-31 18:32:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:37,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:37,468 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:37,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:37,503 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:41,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:41,480 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 18:32:41,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:41,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516883850] [2022-01-31 18:32:41,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [516883850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:41,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:41,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 18:32:41,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742168420] [2022-01-31 18:32:41,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:41,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 18:32:41,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 18:32:41,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 18:32:41,485 INFO L87 Difference]: Start difference. First operand 1026 states and 1364 transitions. Second operand has 116 states, 116 states have (on average 3.0258620689655173) internal successors, (351), 115 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:51,348 INFO L93 Difference]: Finished difference Result 1388 states and 1735 transitions. [2022-01-31 18:32:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 18:32:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.0258620689655173) internal successors, (351), 115 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 910 [2022-01-31 18:32:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:51,349 INFO L225 Difference]: With dead ends: 1388 [2022-01-31 18:32:51,349 INFO L226 Difference]: Without dead ends: 1041 [2022-01-31 18:32:51,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 18:32:51,352 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4889 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4890 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:51,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4890 Valid, 60 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:32:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-01-31 18:32:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1035. [2022-01-31 18:32:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1029 states have (on average 1.3323615160349853) internal successors, (1371), 1029 states have internal predecessors, (1371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1376 transitions. [2022-01-31 18:32:51,829 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1376 transitions. Word has length 910 [2022-01-31 18:32:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:51,830 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1376 transitions. [2022-01-31 18:32:51,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.0258620689655173) internal successors, (351), 115 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1376 transitions. [2022-01-31 18:32:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2022-01-31 18:32:51,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:51,834 INFO L514 BasicCegarLoop]: trace histogram [114, 113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:51,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 18:32:51,834 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -852397550, now seen corresponding path program 113 times [2022-01-31 18:32:51,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:51,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109177514] [2022-01-31 18:32:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:51,836 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:51,836 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:32:51,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:51,867 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:55,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:55,910 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 18:32:55,910 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109177514] [2022-01-31 18:32:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2109177514] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:55,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:55,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 18:32:55,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889214368] [2022-01-31 18:32:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:55,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 18:32:55,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:55,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 18:32:55,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:32:55,914 INFO L87 Difference]: Start difference. First operand 1035 states and 1376 transitions. Second operand has 117 states, 117 states have (on average 3.0256410256410255) internal successors, (354), 116 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:05,827 INFO L93 Difference]: Finished difference Result 1400 states and 1750 transitions. [2022-01-31 18:33:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 18:33:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.0256410256410255) internal successors, (354), 116 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 918 [2022-01-31 18:33:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:05,829 INFO L225 Difference]: With dead ends: 1400 [2022-01-31 18:33:05,829 INFO L226 Difference]: Without dead ends: 1050 [2022-01-31 18:33:05,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 18:33:05,831 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4444 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4445 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:05,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4445 Valid, 55 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-01-31 18:33:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1044. [2022-01-31 18:33:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1038 states have (on average 1.3323699421965318) internal successors, (1383), 1038 states have internal predecessors, (1383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:33:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1388 transitions. [2022-01-31 18:33:06,295 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1388 transitions. Word has length 918 [2022-01-31 18:33:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:06,295 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1388 transitions. [2022-01-31 18:33:06,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.0256410256410255) internal successors, (354), 116 states have internal predecessors, (354), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1388 transitions. [2022-01-31 18:33:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2022-01-31 18:33:06,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:06,299 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:33:06,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 18:33:06,299 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:06,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:06,300 INFO L85 PathProgramCache]: Analyzing trace with hash -827031190, now seen corresponding path program 114 times [2022-01-31 18:33:06,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:06,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202507065] [2022-01-31 18:33:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:06,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:06,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:06,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:06,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:10,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:10,348 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 18:33:10,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202507065] [2022-01-31 18:33:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [202507065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:10,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:10,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 18:33:10,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771008064] [2022-01-31 18:33:10,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:10,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 18:33:10,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 18:33:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 18:33:10,352 INFO L87 Difference]: Start difference. First operand 1044 states and 1388 transitions. Second operand has 118 states, 118 states have (on average 3.0254237288135593) internal successors, (357), 117 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:20,526 INFO L93 Difference]: Finished difference Result 1412 states and 1765 transitions. [2022-01-31 18:33:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 18:33:20,527 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.0254237288135593) internal successors, (357), 117 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 926 [2022-01-31 18:33:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:20,528 INFO L225 Difference]: With dead ends: 1412 [2022-01-31 18:33:20,528 INFO L226 Difference]: Without dead ends: 1059 [2022-01-31 18:33:20,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 18:33:20,531 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5975 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5976 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:20,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5976 Valid, 35 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-01-31 18:33:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1053. [2022-01-31 18:33:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1047 states have (on average 1.332378223495702) internal successors, (1395), 1047 states have internal predecessors, (1395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:33:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1400 transitions. [2022-01-31 18:33:21,061 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1400 transitions. Word has length 926 [2022-01-31 18:33:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:21,061 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 1400 transitions. [2022-01-31 18:33:21,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.0254237288135593) internal successors, (357), 117 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1400 transitions. [2022-01-31 18:33:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 935 [2022-01-31 18:33:21,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:21,066 INFO L514 BasicCegarLoop]: trace histogram [116, 115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:33:21,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 18:33:21,066 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1617409006, now seen corresponding path program 115 times [2022-01-31 18:33:21,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553905968] [2022-01-31 18:33:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:21,068 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:21,068 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:21,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:21,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:25,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:25,280 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 18:33:25,280 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:25,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553905968] [2022-01-31 18:33:25,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [553905968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:25,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:25,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 18:33:25,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513937198] [2022-01-31 18:33:25,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:25,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 18:33:25,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 18:33:25,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:33:25,284 INFO L87 Difference]: Start difference. First operand 1053 states and 1400 transitions. Second operand has 119 states, 119 states have (on average 3.0252100840336134) internal successors, (360), 118 states have internal predecessors, (360), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:35,818 INFO L93 Difference]: Finished difference Result 1424 states and 1780 transitions. [2022-01-31 18:33:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 18:33:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.0252100840336134) internal successors, (360), 118 states have internal predecessors, (360), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 934 [2022-01-31 18:33:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:35,820 INFO L225 Difference]: With dead ends: 1424 [2022-01-31 18:33:35,820 INFO L226 Difference]: Without dead ends: 1068 [2022-01-31 18:33:35,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 18:33:35,822 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 4538 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4539 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:35,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4539 Valid, 65 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-01-31 18:33:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1062. [2022-01-31 18:33:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1056 states have (on average 1.3323863636363635) internal successors, (1407), 1056 states have internal predecessors, (1407), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:33:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1412 transitions. [2022-01-31 18:33:36,319 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1412 transitions. Word has length 934 [2022-01-31 18:33:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:36,320 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1412 transitions. [2022-01-31 18:33:36,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.0252100840336134) internal successors, (360), 118 states have internal predecessors, (360), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1412 transitions. [2022-01-31 18:33:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 943 [2022-01-31 18:33:36,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:36,324 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:33:36,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 18:33:36,324 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:36,324 INFO L85 PathProgramCache]: Analyzing trace with hash -638002838, now seen corresponding path program 116 times [2022-01-31 18:33:36,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:36,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562760409] [2022-01-31 18:33:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:36,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:36,326 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:36,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:36,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:40,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:40,624 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 18:33:40,624 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:40,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562760409] [2022-01-31 18:33:40,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562760409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:40,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:40,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 18:33:40,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846385937] [2022-01-31 18:33:40,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:40,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 18:33:40,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 18:33:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 18:33:40,628 INFO L87 Difference]: Start difference. First operand 1062 states and 1412 transitions. Second operand has 120 states, 120 states have (on average 3.025) internal successors, (363), 119 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:33:51,684 INFO L93 Difference]: Finished difference Result 1436 states and 1795 transitions. [2022-01-31 18:33:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 18:33:51,685 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 3.025) internal successors, (363), 119 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 942 [2022-01-31 18:33:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:33:51,686 INFO L225 Difference]: With dead ends: 1436 [2022-01-31 18:33:51,686 INFO L226 Difference]: Without dead ends: 1077 [2022-01-31 18:33:51,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 18:33:51,689 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5685 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 788 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5686 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 788 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:33:51,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5686 Valid, 40 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [788 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:33:51,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-31 18:33:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1071. [2022-01-31 18:33:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1065 states have (on average 1.332394366197183) internal successors, (1419), 1065 states have internal predecessors, (1419), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:33:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1424 transitions. [2022-01-31 18:33:52,219 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1424 transitions. Word has length 942 [2022-01-31 18:33:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:33:52,220 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1424 transitions. [2022-01-31 18:33:52,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 3.025) internal successors, (363), 119 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:33:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1424 transitions. [2022-01-31 18:33:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2022-01-31 18:33:52,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:33:52,224 INFO L514 BasicCegarLoop]: trace histogram [118, 117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:33:52,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 18:33:52,224 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:33:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:33:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1164679662, now seen corresponding path program 117 times [2022-01-31 18:33:52,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:33:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411139521] [2022-01-31 18:33:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:33:52,226 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:33:52,226 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:33:52,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:33:52,266 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:33:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:56,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:33:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:33:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:33:56,702 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:33:56,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411139521] [2022-01-31 18:33:56,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411139521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:33:56,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:33:56,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 18:33:56,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698753671] [2022-01-31 18:33:56,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:33:56,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 18:33:56,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:33:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 18:33:56,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:33:56,705 INFO L87 Difference]: Start difference. First operand 1071 states and 1424 transitions. Second operand has 121 states, 121 states have (on average 3.024793388429752) internal successors, (366), 120 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:34:07,978 INFO L93 Difference]: Finished difference Result 1448 states and 1810 transitions. [2022-01-31 18:34:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 18:34:07,979 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.024793388429752) internal successors, (366), 120 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 950 [2022-01-31 18:34:07,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:34:07,980 INFO L225 Difference]: With dead ends: 1448 [2022-01-31 18:34:07,980 INFO L226 Difference]: Without dead ends: 1086 [2022-01-31 18:34:07,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 18:34:07,984 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5360 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5361 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:34:07,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5361 Valid, 50 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:34:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-01-31 18:34:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1080. [2022-01-31 18:34:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1074 states have (on average 1.3324022346368716) internal successors, (1431), 1074 states have internal predecessors, (1431), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:34:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1436 transitions. [2022-01-31 18:34:08,490 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1436 transitions. Word has length 950 [2022-01-31 18:34:08,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:34:08,490 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1436 transitions. [2022-01-31 18:34:08,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.024793388429752) internal successors, (366), 120 states have internal predecessors, (366), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1436 transitions. [2022-01-31 18:34:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2022-01-31 18:34:08,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:34:08,495 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:34:08,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 18:34:08,495 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:34:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:34:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1484517738, now seen corresponding path program 118 times [2022-01-31 18:34:08,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:34:08,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902277979] [2022-01-31 18:34:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:34:08,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:34:08,497 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:34:08,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:34:08,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:34:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:12,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:34:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:12,837 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 18:34:12,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:34:12,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902277979] [2022-01-31 18:34:12,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1902277979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:34:12,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:34:12,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 18:34:12,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920981435] [2022-01-31 18:34:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:34:12,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 18:34:12,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:34:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 18:34:12,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 18:34:12,841 INFO L87 Difference]: Start difference. First operand 1080 states and 1436 transitions. Second operand has 122 states, 122 states have (on average 3.0245901639344264) internal successors, (369), 121 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:34:23,905 INFO L93 Difference]: Finished difference Result 1460 states and 1825 transitions. [2022-01-31 18:34:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 18:34:23,905 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.0245901639344264) internal successors, (369), 121 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 958 [2022-01-31 18:34:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:34:23,907 INFO L225 Difference]: With dead ends: 1460 [2022-01-31 18:34:23,907 INFO L226 Difference]: Without dead ends: 1095 [2022-01-31 18:34:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 18:34:23,909 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5467 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5468 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:34:23,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5468 Valid, 40 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:34:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-01-31 18:34:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1089. [2022-01-31 18:34:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1083 states have (on average 1.332409972299169) internal successors, (1443), 1083 states have internal predecessors, (1443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:34:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1448 transitions. [2022-01-31 18:34:24,440 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1448 transitions. Word has length 958 [2022-01-31 18:34:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:34:24,441 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1448 transitions. [2022-01-31 18:34:24,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.0245901639344264) internal successors, (369), 121 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1448 transitions. [2022-01-31 18:34:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2022-01-31 18:34:24,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:34:24,445 INFO L514 BasicCegarLoop]: trace histogram [120, 119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:34:24,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 18:34:24,445 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:34:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:34:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1337311250, now seen corresponding path program 119 times [2022-01-31 18:34:24,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:34:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334723677] [2022-01-31 18:34:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:34:24,447 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:34:24,447 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:34:24,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:34:24,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:34:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:28,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:34:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:28,875 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 18:34:28,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:34:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334723677] [2022-01-31 18:34:28,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [334723677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:34:28,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:34:28,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 18:34:28,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991205366] [2022-01-31 18:34:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:34:28,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 18:34:28,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:34:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 18:34:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:34:28,877 INFO L87 Difference]: Start difference. First operand 1089 states and 1448 transitions. Second operand has 123 states, 123 states have (on average 3.024390243902439) internal successors, (372), 122 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:34:40,511 INFO L93 Difference]: Finished difference Result 1472 states and 1840 transitions. [2022-01-31 18:34:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 18:34:40,511 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 3.024390243902439) internal successors, (372), 122 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 966 [2022-01-31 18:34:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:34:40,512 INFO L225 Difference]: With dead ends: 1472 [2022-01-31 18:34:40,512 INFO L226 Difference]: Without dead ends: 1104 [2022-01-31 18:34:40,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 18:34:40,515 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5334 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5335 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:34:40,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5335 Valid, 50 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 18:34:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-01-31 18:34:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1098. [2022-01-31 18:34:41,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1092 states have (on average 1.3324175824175823) internal successors, (1455), 1092 states have internal predecessors, (1455), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:34:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1460 transitions. [2022-01-31 18:34:41,034 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1460 transitions. Word has length 966 [2022-01-31 18:34:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:34:41,034 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 1460 transitions. [2022-01-31 18:34:41,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 3.024390243902439) internal successors, (372), 122 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1460 transitions. [2022-01-31 18:34:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2022-01-31 18:34:41,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:34:41,038 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:34:41,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 18:34:41,038 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:34:41,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:34:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1230124694, now seen corresponding path program 120 times [2022-01-31 18:34:41,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:34:41,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675226513] [2022-01-31 18:34:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:34:41,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:34:41,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:34:41,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:34:41,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:34:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:45,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:34:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:34:45,550 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 18:34:45,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:34:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675226513] [2022-01-31 18:34:45,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675226513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:34:45,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:34:45,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 18:34:45,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578199069] [2022-01-31 18:34:45,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:34:45,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 18:34:45,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:34:45,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 18:34:45,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 18:34:45,555 INFO L87 Difference]: Start difference. First operand 1098 states and 1460 transitions. Second operand has 124 states, 124 states have (on average 3.024193548387097) internal successors, (375), 123 states have internal predecessors, (375), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:34:57,522 INFO L93 Difference]: Finished difference Result 1484 states and 1855 transitions. [2022-01-31 18:34:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 18:34:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.024193548387097) internal successors, (375), 123 states have internal predecessors, (375), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 974 [2022-01-31 18:34:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:34:57,524 INFO L225 Difference]: With dead ends: 1484 [2022-01-31 18:34:57,524 INFO L226 Difference]: Without dead ends: 1113 [2022-01-31 18:34:57,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 18:34:57,526 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5201 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5202 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:34:57,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5202 Valid, 35 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:34:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-31 18:34:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1107. [2022-01-31 18:34:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1101 states have (on average 1.332425068119891) internal successors, (1467), 1101 states have internal predecessors, (1467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:34:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1472 transitions. [2022-01-31 18:34:58,052 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1472 transitions. Word has length 974 [2022-01-31 18:34:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:34:58,052 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1472 transitions. [2022-01-31 18:34:58,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.024193548387097) internal successors, (375), 123 states have internal predecessors, (375), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:34:58,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1472 transitions. [2022-01-31 18:34:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 983 [2022-01-31 18:34:58,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:34:58,057 INFO L514 BasicCegarLoop]: trace histogram [122, 121, 121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:34:58,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 18:34:58,057 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:34:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:34:58,057 INFO L85 PathProgramCache]: Analyzing trace with hash 613177874, now seen corresponding path program 121 times [2022-01-31 18:34:58,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:34:58,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144373757] [2022-01-31 18:34:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:34:58,059 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:34:58,059 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:34:58,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:34:58,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:34:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:35:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:02,704 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 18:35:02,705 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:35:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144373757] [2022-01-31 18:35:02,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144373757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:35:02,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:35:02,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 18:35:02,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038977027] [2022-01-31 18:35:02,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:35:02,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 18:35:02,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:35:02,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 18:35:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:35:02,709 INFO L87 Difference]: Start difference. First operand 1107 states and 1472 transitions. Second operand has 125 states, 125 states have (on average 3.024) internal successors, (378), 124 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:35:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:35:14,723 INFO L93 Difference]: Finished difference Result 1496 states and 1870 transitions. [2022-01-31 18:35:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 18:35:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.024) internal successors, (378), 124 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 982 [2022-01-31 18:35:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:35:14,725 INFO L225 Difference]: With dead ends: 1496 [2022-01-31 18:35:14,725 INFO L226 Difference]: Without dead ends: 1122 [2022-01-31 18:35:14,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 18:35:14,727 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5540 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5541 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:35:14,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5541 Valid, 55 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:35:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-31 18:35:15,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1116. [2022-01-31 18:35:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1110 states have (on average 1.3324324324324324) internal successors, (1479), 1110 states have internal predecessors, (1479), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:35:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1484 transitions. [2022-01-31 18:35:15,259 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1484 transitions. Word has length 982 [2022-01-31 18:35:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:35:15,259 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 1484 transitions. [2022-01-31 18:35:15,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.024) internal successors, (378), 124 states have internal predecessors, (378), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:35:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1484 transitions. [2022-01-31 18:35:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2022-01-31 18:35:15,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:35:15,264 INFO L514 BasicCegarLoop]: trace histogram [123, 122, 122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:35:15,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 18:35:15,264 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:35:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:35:15,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1291739498, now seen corresponding path program 122 times [2022-01-31 18:35:15,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:35:15,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609437377] [2022-01-31 18:35:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:35:15,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:35:15,266 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:35:15,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:35:15,318 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:35:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:20,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:35:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:35:20,022 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:35:20,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609437377] [2022-01-31 18:35:20,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [609437377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:35:20,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:35:20,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 18:35:20,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708571062] [2022-01-31 18:35:20,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:35:20,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 18:35:20,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:35:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 18:35:20,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 18:35:20,026 INFO L87 Difference]: Start difference. First operand 1116 states and 1484 transitions. Second operand has 126 states, 126 states have (on average 3.0238095238095237) internal successors, (381), 125 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:35:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:35:32,387 INFO L93 Difference]: Finished difference Result 1508 states and 1885 transitions. [2022-01-31 18:35:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 18:35:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.0238095238095237) internal successors, (381), 125 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 990 [2022-01-31 18:35:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:35:32,389 INFO L225 Difference]: With dead ends: 1508 [2022-01-31 18:35:32,389 INFO L226 Difference]: Without dead ends: 1131 [2022-01-31 18:35:32,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 18:35:32,391 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5767 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5768 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:35:32,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5768 Valid, 35 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:35:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-01-31 18:35:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1125. [2022-01-31 18:35:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1119 states have (on average 1.3324396782841823) internal successors, (1491), 1119 states have internal predecessors, (1491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:35:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1496 transitions. [2022-01-31 18:35:32,952 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1496 transitions. Word has length 990 [2022-01-31 18:35:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:35:32,952 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1496 transitions. [2022-01-31 18:35:32,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.0238095238095237) internal successors, (381), 125 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:35:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1496 transitions. [2022-01-31 18:35:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 999 [2022-01-31 18:35:32,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:35:32,957 INFO L514 BasicCegarLoop]: trace histogram [124, 123, 123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:35:32,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 18:35:32,957 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:35:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:35:32,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1834470382, now seen corresponding path program 123 times [2022-01-31 18:35:32,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:35:32,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068128069] [2022-01-31 18:35:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:35:32,959 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:35:32,959 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:35:32,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:35:32,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:35:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:37,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:35:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:37,796 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 18:35:37,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:35:37,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068128069] [2022-01-31 18:35:37,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068128069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:35:37,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:35:37,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 18:35:37,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423877314] [2022-01-31 18:35:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:35:37,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 18:35:37,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:35:37,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 18:35:37,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:35:37,799 INFO L87 Difference]: Start difference. First operand 1125 states and 1496 transitions. Second operand has 127 states, 127 states have (on average 3.0236220472440944) internal successors, (384), 126 states have internal predecessors, (384), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:35:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:35:50,436 INFO L93 Difference]: Finished difference Result 1520 states and 1900 transitions. [2022-01-31 18:35:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 18:35:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.0236220472440944) internal successors, (384), 126 states have internal predecessors, (384), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 998 [2022-01-31 18:35:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:35:50,438 INFO L225 Difference]: With dead ends: 1520 [2022-01-31 18:35:50,438 INFO L226 Difference]: Without dead ends: 1140 [2022-01-31 18:35:50,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 18:35:50,441 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5962 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5963 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:35:50,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5963 Valid, 40 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 18:35:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-31 18:35:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1134. [2022-01-31 18:35:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1128 states have (on average 1.3324468085106382) internal successors, (1503), 1128 states have internal predecessors, (1503), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:35:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1508 transitions. [2022-01-31 18:35:51,008 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1508 transitions. Word has length 998 [2022-01-31 18:35:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:35:51,008 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 1508 transitions. [2022-01-31 18:35:51,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.0236220472440944) internal successors, (384), 126 states have internal predecessors, (384), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:35:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1508 transitions. [2022-01-31 18:35:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2022-01-31 18:35:51,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:35:51,013 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:35:51,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 18:35:51,014 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:35:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:35:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1608366442, now seen corresponding path program 124 times [2022-01-31 18:35:51,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:35:51,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289837799] [2022-01-31 18:35:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:35:51,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:35:51,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 18:35:51,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:35:51,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:35:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:55,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:35:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:35:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:35:55,998 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:35:55,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289837799] [2022-01-31 18:35:55,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [289837799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:35:55,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:35:55,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 18:35:55,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006728090] [2022-01-31 18:35:55,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:35:55,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 18:35:55,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:35:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 18:35:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 18:35:56,003 INFO L87 Difference]: Start difference. First operand 1134 states and 1508 transitions. Second operand has 128 states, 128 states have (on average 3.0234375) internal successors, (387), 127 states have internal predecessors, (387), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)