/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_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:14:04,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:14:04,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:14:04,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:14:04,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:14:04,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:14:04,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:14:04,674 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 18:14:04,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:14:04,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:14:04,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:14:04,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:14:04,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:14:04,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:14:04,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:14:04,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:14:04,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:14:04,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:14:04,686 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:14:04,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:14:04,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:14:04,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:14:04,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:14:04,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:14:04,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:14:04,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:14:04,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:14:04,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:14:04,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:14:04,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:14:04,687 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:14:04,687 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:14:04,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:14:04,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:14:04,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:14:04,902 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:14:04,902 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:14:04,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2022-01-31 18:14:04,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92aba2a0/7d185bd5b3de4121a39f7161cef65310/FLAG5f6283713 [2022-01-31 18:14:05,282 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:14:05,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2022-01-31 18:14:05,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92aba2a0/7d185bd5b3de4121a39f7161cef65310/FLAG5f6283713 [2022-01-31 18:14:05,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a92aba2a0/7d185bd5b3de4121a39f7161cef65310 [2022-01-31 18:14:05,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:14:05,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:14:05,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:14:05,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:14:05,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:14:05,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@685eb46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05, skipping insertion in model container [2022-01-31 18:14:05,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:14:05,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:14:05,461 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_of_struct_ptr_flag_init.i[959,972] [2022-01-31 18:14:05,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:14:05,476 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:14:05,483 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_of_struct_ptr_flag_init.i[959,972] [2022-01-31 18:14:05,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:14:05,495 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:14:05,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05 WrapperNode [2022-01-31 18:14:05,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:14:05,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:14:05,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:14:05,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:14:05,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:14:05,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:14:05,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:14:05,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:14:05,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (1/1) ... [2022-01-31 18:14:05,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:14:05,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:14:05,553 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 18:14:05,569 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 18:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2022-01-31 18:14:05,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:14:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure init [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:14:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 18:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:14:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:14:05,644 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:14:05,646 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:14:05,786 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:14:05,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:14:05,790 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 18:14:05,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:14:05 BoogieIcfgContainer [2022-01-31 18:14:05,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:14:05,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:14:05,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:14:05,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:14:05,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:14:05" (1/3) ... [2022-01-31 18:14:05,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b74ef36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:14:05, skipping insertion in model container [2022-01-31 18:14:05,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:14:05" (2/3) ... [2022-01-31 18:14:05,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b74ef36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:14:05, skipping insertion in model container [2022-01-31 18:14:05,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:14:05" (3/3) ... [2022-01-31 18:14:05,808 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2022-01-31 18:14:05,811 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:14:05,811 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:14:05,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:14:05,867 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 18:14:05,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:14:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 18:14:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 18:14:05,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:05,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:05,910 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1552187691, now seen corresponding path program 1 times [2022-01-31 18:14:05,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:05,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700938495] [2022-01-31 18:14:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:05,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:05,995 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,152 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 18:14:06,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:06,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700938495] [2022-01-31 18:14:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1700938495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:06,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:06,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:14:06,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256851195] [2022-01-31 18:14:06,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:06,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:14:06,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:14:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:14:06,185 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:06,293 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2022-01-31 18:14:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:14:06,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 18:14:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:06,304 INFO L225 Difference]: With dead ends: 59 [2022-01-31 18:14:06,305 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 18:14:06,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 18:14:06,310 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:06,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 18:14:06,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-31 18:14:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 18:14:06,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-31 18:14:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:06,348 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 18:14:06,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 18:14:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 18:14:06,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:06,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:06,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:14:06,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:06,353 INFO L85 PathProgramCache]: Analyzing trace with hash -22761210, now seen corresponding path program 1 times [2022-01-31 18:14:06,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:06,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428762913] [2022-01-31 18:14:06,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:06,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:06,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,457 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 18:14:06,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:06,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428762913] [2022-01-31 18:14:06,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [428762913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:06,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:06,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:14:06,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821612224] [2022-01-31 18:14:06,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:06,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:14:06,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:14:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:14:06,461 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:06,566 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-01-31 18:14:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:14:06,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 18:14:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:06,569 INFO L225 Difference]: With dead ends: 51 [2022-01-31 18:14:06,569 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 18:14:06,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:14:06,573 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:06,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 18:14:06,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-31 18:14:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 18:14:06,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2022-01-31 18:14:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:06,591 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 18:14:06,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 18:14:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 18:14:06,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:06,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:06,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:14:06,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1516983208, now seen corresponding path program 1 times [2022-01-31 18:14:06,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:06,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322454612] [2022-01-31 18:14:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:06,746 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:06,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:06,808 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 18:14:06,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:06,832 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (= (select (select |#memory_$Pointer$.offset_6| |main_~#a~0.base_5|) (+ (* 4 main_~i~1_11) (* 4 .v_it_1.0) |main_~#a~0.offset_5|)) 0)) [2022-01-31 18:14:06,837 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (= (select (select |#memory_$Pointer$.base_6| |main_~#a~0.base_5|) (+ (* 4 main_~i~1_12) |main_~#a~0.offset_5| (* 4 .v_it_2.1))) 0)) [2022-01-31 18:14:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:06,932 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 18:14:06,934 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:06,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322454612] [2022-01-31 18:14:06,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [322454612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:06,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:06,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:14:06,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761469293] [2022-01-31 18:14:06,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:06,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:14:06,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:14:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:14:06,936 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:07,062 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-01-31 18:14:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:14:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-01-31 18:14:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:07,063 INFO L225 Difference]: With dead ends: 50 [2022-01-31 18:14:07,063 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 18:14:07,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:14:07,064 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:07,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 18:14:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-31 18:14:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 18:14:07,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-01-31 18:14:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:07,069 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 18:14:07,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 18:14:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 18:14:07,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:07,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:07,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:14:07,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash -581601658, now seen corresponding path program 1 times [2022-01-31 18:14:07,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:07,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775797937] [2022-01-31 18:14:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:07,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:07,073 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:07,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:07,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,140 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 18:14:07,140 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:07,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775797937] [2022-01-31 18:14:07,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1775797937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:07,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:07,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:14:07,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149973505] [2022-01-31 18:14:07,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:07,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:14:07,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:07,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:14:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:14:07,142 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:07,238 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-01-31 18:14:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:14:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-01-31 18:14:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:07,239 INFO L225 Difference]: With dead ends: 57 [2022-01-31 18:14:07,239 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 18:14:07,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:14:07,240 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:07,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 24 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 18:14:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-01-31 18:14:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-01-31 18:14:07,246 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2022-01-31 18:14:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:07,246 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-01-31 18:14:07,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-01-31 18:14:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 18:14:07,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:07,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:07,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:14:07,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:07,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:07,248 INFO L85 PathProgramCache]: Analyzing trace with hash 394436136, now seen corresponding path program 2 times [2022-01-31 18:14:07,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681687341] [2022-01-31 18:14:07,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:07,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:07,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:07,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:07,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,290 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 18:14:07,290 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:07,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681687341] [2022-01-31 18:14:07,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1681687341] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:07,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:07,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:14:07,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218557305] [2022-01-31 18:14:07,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:07,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:14:07,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:14:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:14:07,292 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:07,367 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-01-31 18:14:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:14:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 18:14:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:07,368 INFO L225 Difference]: With dead ends: 53 [2022-01-31 18:14:07,368 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 18:14:07,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:14:07,369 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:07,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:14:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 18:14:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 18:14:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-01-31 18:14:07,374 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2022-01-31 18:14:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:07,374 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-01-31 18:14:07,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-01-31 18:14:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 18:14:07,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:07,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:07,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:14:07,375 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash -585396888, now seen corresponding path program 1 times [2022-01-31 18:14:07,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:07,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482783972] [2022-01-31 18:14:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:07,378 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:07,378 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:07,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:07,379 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,429 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 18:14:07,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:07,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482783972] [2022-01-31 18:14:07,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [482783972] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:07,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:07,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:14:07,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070810933] [2022-01-31 18:14:07,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:07,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:14:07,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:14:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:14:07,431 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:07,548 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-01-31 18:14:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:14:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 18:14:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:07,549 INFO L225 Difference]: With dead ends: 65 [2022-01-31 18:14:07,549 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 18:14:07,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:14:07,549 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:07,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 27 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 18:14:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2022-01-31 18:14:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-01-31 18:14:07,554 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2022-01-31 18:14:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:07,555 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-01-31 18:14:07,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-01-31 18:14:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 18:14:07,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:07,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:07,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:14:07,556 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1393138108, now seen corresponding path program 2 times [2022-01-31 18:14:07,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:07,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477366216] [2022-01-31 18:14:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:07,558 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:07,558 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:07,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:07,559 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:07,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477366216] [2022-01-31 18:14:07,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [477366216] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:07,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:07,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:14:07,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298895476] [2022-01-31 18:14:07,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:07,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:14:07,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:14:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:14:07,608 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:07,722 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-01-31 18:14:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:14:07,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-01-31 18:14:07,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:07,725 INFO L225 Difference]: With dead ends: 73 [2022-01-31 18:14:07,725 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 18:14:07,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:14:07,727 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:07,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 23 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 18:14:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2022-01-31 18:14:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-31 18:14:07,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2022-01-31 18:14:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:07,738 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-31 18:14:07,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,738 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-31 18:14:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 18:14:07,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:07,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:07,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:14:07,739 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:07,739 INFO L85 PathProgramCache]: Analyzing trace with hash -110063640, now seen corresponding path program 3 times [2022-01-31 18:14:07,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:07,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49313513] [2022-01-31 18:14:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:07,742 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:07,742 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:07,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:07,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:07,824 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 18:14:07,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:07,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49313513] [2022-01-31 18:14:07,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [49313513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:07,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:07,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:14:07,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015801812] [2022-01-31 18:14:07,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:07,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:14:07,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:14:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:14:07,826 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:07,974 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-01-31 18:14:07,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:14:07,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 18:14:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:07,975 INFO L225 Difference]: With dead ends: 81 [2022-01-31 18:14:07,975 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 18:14:07,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:14:07,976 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:07,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 27 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 18:14:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2022-01-31 18:14:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-01-31 18:14:07,982 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2022-01-31 18:14:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:07,982 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-01-31 18:14:07,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-01-31 18:14:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 18:14:07,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:07,983 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:07,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:14:07,983 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1247521852, now seen corresponding path program 4 times [2022-01-31 18:14:07,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:07,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619456364] [2022-01-31 18:14:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:07,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:07,985 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:07,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:07,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,047 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 18:14:08,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619456364] [2022-01-31 18:14:08,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1619456364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:08,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:08,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:14:08,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527803088] [2022-01-31 18:14:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:08,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:14:08,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:08,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:14:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:14:08,049 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:08,231 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2022-01-31 18:14:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:14:08,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-01-31 18:14:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:08,233 INFO L225 Difference]: With dead ends: 89 [2022-01-31 18:14:08,233 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 18:14:08,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:14:08,235 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 113 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:08,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 27 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 18:14:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2022-01-31 18:14:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-01-31 18:14:08,240 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 37 [2022-01-31 18:14:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:08,240 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-01-31 18:14:08,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-01-31 18:14:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 18:14:08,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:08,241 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:08,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:14:08,241 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash 26849896, now seen corresponding path program 5 times [2022-01-31 18:14:08,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:08,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324115890] [2022-01-31 18:14:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:08,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:08,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:08,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:08,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:08,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:08,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324115890] [2022-01-31 18:14:08,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1324115890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:08,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:08,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:14:08,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885364984] [2022-01-31 18:14:08,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:08,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:14:08,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:14:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:14:08,324 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:08,518 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2022-01-31 18:14:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:14:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-01-31 18:14:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:08,519 INFO L225 Difference]: With dead ends: 97 [2022-01-31 18:14:08,519 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 18:14:08,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:14:08,520 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:08,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 25 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 18:14:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2022-01-31 18:14:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-01-31 18:14:08,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 40 [2022-01-31 18:14:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:08,526 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-01-31 18:14:08,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-01-31 18:14:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 18:14:08,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:08,527 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:08,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:14:08,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1619665220, now seen corresponding path program 6 times [2022-01-31 18:14:08,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:08,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142018044] [2022-01-31 18:14:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:08,529 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:08,529 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:08,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:08,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:08,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:08,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142018044] [2022-01-31 18:14:08,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142018044] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:08,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:08,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:14:08,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528501175] [2022-01-31 18:14:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:08,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:14:08,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:14:08,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:14:08,634 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:08,911 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2022-01-31 18:14:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:14:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-01-31 18:14:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:08,912 INFO L225 Difference]: With dead ends: 105 [2022-01-31 18:14:08,913 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 18:14:08,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:14:08,913 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:08,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 33 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 18:14:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 51. [2022-01-31 18:14:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-01-31 18:14:08,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 43 [2022-01-31 18:14:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:08,932 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-01-31 18:14:08,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-01-31 18:14:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 18:14:08,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:08,936 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:08,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:14:08,936 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1912671000, now seen corresponding path program 7 times [2022-01-31 18:14:08,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:08,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520732523] [2022-01-31 18:14:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:08,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:08,940 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:08,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:08,942 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,029 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 18:14:09,030 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:09,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520732523] [2022-01-31 18:14:09,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [520732523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:09,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:09,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:14:09,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557206948] [2022-01-31 18:14:09,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:09,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:14:09,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:14:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:14:09,031 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:09,286 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2022-01-31 18:14:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:14:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-01-31 18:14:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:09,288 INFO L225 Difference]: With dead ends: 113 [2022-01-31 18:14:09,288 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 18:14:09,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:14:09,288 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:09,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 29 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:14:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 18:14:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 54. [2022-01-31 18:14:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-01-31 18:14:09,295 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2022-01-31 18:14:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:09,295 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-01-31 18:14:09,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-01-31 18:14:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 18:14:09,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:09,296 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:09,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:14:09,296 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1547685572, now seen corresponding path program 8 times [2022-01-31 18:14:09,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:09,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179277281] [2022-01-31 18:14:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:09,298 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:09,298 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:09,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:09,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,386 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 18:14:09,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179277281] [2022-01-31 18:14:09,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1179277281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:09,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:09,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:14:09,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566683554] [2022-01-31 18:14:09,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:09,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:14:09,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:14:09,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:14:09,388 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:09,669 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2022-01-31 18:14:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:14:09,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-01-31 18:14:09,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:09,671 INFO L225 Difference]: With dead ends: 121 [2022-01-31 18:14:09,671 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 18:14:09,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:14:09,671 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 190 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:09,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 25 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 18:14:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 57. [2022-01-31 18:14:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-01-31 18:14:09,678 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 49 [2022-01-31 18:14:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:09,679 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-01-31 18:14:09,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-01-31 18:14:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 18:14:09,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:09,679 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:09,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:14:09,679 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1225283432, now seen corresponding path program 9 times [2022-01-31 18:14:09,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:09,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758286131] [2022-01-31 18:14:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:09,681 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:09,681 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:09,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:09,682 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:09,785 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 18:14:09,785 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:09,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758286131] [2022-01-31 18:14:09,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758286131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:09,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:09,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:14:09,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618161297] [2022-01-31 18:14:09,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:09,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:14:09,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:09,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:14:09,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:14:09,787 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:10,119 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2022-01-31 18:14:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:14:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-01-31 18:14:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:10,120 INFO L225 Difference]: With dead ends: 129 [2022-01-31 18:14:10,120 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 18:14:10,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:14:10,121 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 200 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:10,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 27 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 18:14:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 60. [2022-01-31 18:14:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-01-31 18:14:10,129 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 52 [2022-01-31 18:14:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:10,129 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-01-31 18:14:10,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-01-31 18:14:10,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 18:14:10,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:10,130 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:10,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:14:10,130 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 90004548, now seen corresponding path program 10 times [2022-01-31 18:14:10,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:10,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128894245] [2022-01-31 18:14:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:10,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:10,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:10,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:10,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:10,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:10,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:10,234 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:10,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128894245] [2022-01-31 18:14:10,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128894245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:10,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:10,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:14:10,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710228727] [2022-01-31 18:14:10,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:10,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:14:10,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:14:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:14:10,235 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:10,585 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2022-01-31 18:14:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:14:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-01-31 18:14:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:10,586 INFO L225 Difference]: With dead ends: 137 [2022-01-31 18:14:10,586 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 18:14:10,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:14:10,588 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 246 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:10,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 25 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 18:14:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 63. [2022-01-31 18:14:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-01-31 18:14:10,597 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 55 [2022-01-31 18:14:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:10,597 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-01-31 18:14:10,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-01-31 18:14:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 18:14:10,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:10,597 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:10,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:14:10,598 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1864227304, now seen corresponding path program 11 times [2022-01-31 18:14:10,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:10,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377204144] [2022-01-31 18:14:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:10,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:10,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:10,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:10,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:10,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:10,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:10,747 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 18:14:10,747 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:10,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377204144] [2022-01-31 18:14:10,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377204144] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:10,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:10,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:14:10,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92054858] [2022-01-31 18:14:10,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:10,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:14:10,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:14:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:14:10,748 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:11,143 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2022-01-31 18:14:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:14:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-01-31 18:14:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:11,144 INFO L225 Difference]: With dead ends: 145 [2022-01-31 18:14:11,144 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 18:14:11,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=321, Invalid=609, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:14:11,145 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 198 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:11,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 35 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 18:14:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 66. [2022-01-31 18:14:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-01-31 18:14:11,154 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2022-01-31 18:14:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:11,154 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-01-31 18:14:11,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-01-31 18:14:11,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 18:14:11,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:11,155 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:11,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:14:11,155 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash -428160572, now seen corresponding path program 12 times [2022-01-31 18:14:11,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:11,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864004098] [2022-01-31 18:14:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:11,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:11,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:11,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:11,158 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:11,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:11,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864004098] [2022-01-31 18:14:11,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [864004098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:11,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:11,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:14:11,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866835381] [2022-01-31 18:14:11,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:11,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:14:11,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:14:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:14:11,290 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:11,694 INFO L93 Difference]: Finished difference Result 153 states and 186 transitions. [2022-01-31 18:14:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:14:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2022-01-31 18:14:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:11,695 INFO L225 Difference]: With dead ends: 153 [2022-01-31 18:14:11,695 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 18:14:11,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=366, Invalid=690, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:14:11,697 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 241 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:11,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 29 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 18:14:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 69. [2022-01-31 18:14:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-01-31 18:14:11,708 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2022-01-31 18:14:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:11,709 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-01-31 18:14:11,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-01-31 18:14:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 18:14:11,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:11,710 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:11,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:14:11,710 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1319599208, now seen corresponding path program 13 times [2022-01-31 18:14:11,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:11,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654640430] [2022-01-31 18:14:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:11,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:11,712 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:11,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:11,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:11,876 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 18:14:11,877 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:11,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654640430] [2022-01-31 18:14:11,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [654640430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:11,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:11,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:14:11,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802465338] [2022-01-31 18:14:11,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:11,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:14:11,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:11,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:14:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:14:11,878 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:12,315 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2022-01-31 18:14:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:14:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2022-01-31 18:14:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:12,316 INFO L225 Difference]: With dead ends: 161 [2022-01-31 18:14:12,316 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 18:14:12,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:14:12,317 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 270 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:12,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 27 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 18:14:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 72. [2022-01-31 18:14:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-01-31 18:14:12,327 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 64 [2022-01-31 18:14:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:12,327 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-01-31 18:14:12,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-01-31 18:14:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 18:14:12,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:12,328 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:12,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:14:12,328 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:12,328 INFO L85 PathProgramCache]: Analyzing trace with hash 942675780, now seen corresponding path program 14 times [2022-01-31 18:14:12,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:12,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471175438] [2022-01-31 18:14:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:12,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:12,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:12,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:12,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:12,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:12,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:12,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471175438] [2022-01-31 18:14:12,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471175438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:12,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:12,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:14:12,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516407283] [2022-01-31 18:14:12,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:12,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:14:12,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:12,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:14:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:14:12,501 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:12,958 INFO L93 Difference]: Finished difference Result 169 states and 206 transitions. [2022-01-31 18:14:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:14:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2022-01-31 18:14:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:12,959 INFO L225 Difference]: With dead ends: 169 [2022-01-31 18:14:12,959 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 18:14:12,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=867, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:14:12,960 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:12,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 31 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 18:14:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 75. [2022-01-31 18:14:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-01-31 18:14:12,971 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 67 [2022-01-31 18:14:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:12,971 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-01-31 18:14:12,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-01-31 18:14:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 18:14:12,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:12,972 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:12,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:14:12,972 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash -938656024, now seen corresponding path program 15 times [2022-01-31 18:14:12,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:12,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427212992] [2022-01-31 18:14:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:12,974 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:12,974 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:12,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:12,975 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,159 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 18:14:13,159 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:13,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427212992] [2022-01-31 18:14:13,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427212992] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:13,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:13,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:14:13,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984614744] [2022-01-31 18:14:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:13,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:14:13,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:14:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:14:13,160 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:13,673 INFO L93 Difference]: Finished difference Result 177 states and 216 transitions. [2022-01-31 18:14:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:14:13,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2022-01-31 18:14:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:13,674 INFO L225 Difference]: With dead ends: 177 [2022-01-31 18:14:13,674 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 18:14:13,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=963, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:14:13,675 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 336 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:13,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 27 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 18:14:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 78. [2022-01-31 18:14:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-01-31 18:14:13,687 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 70 [2022-01-31 18:14:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:13,687 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-01-31 18:14:13,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-01-31 18:14:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 18:14:13,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:13,688 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:13,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:14:13,688 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1628783812, now seen corresponding path program 16 times [2022-01-31 18:14:13,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:13,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466457097] [2022-01-31 18:14:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:13,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:13,690 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:13,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:13,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:13,882 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 18:14:13,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466457097] [2022-01-31 18:14:13,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466457097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:13,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:13,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:14:13,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932454844] [2022-01-31 18:14:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:13,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:14:13,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:14:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:14:13,883 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 20 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:14,411 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-01-31 18:14:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:14:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 20 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2022-01-31 18:14:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:14,413 INFO L225 Difference]: With dead ends: 185 [2022-01-31 18:14:14,413 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 18:14:14,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=576, Invalid=1064, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:14:14,414 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 303 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:14,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 27 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:14:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 18:14:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 81. [2022-01-31 18:14:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-01-31 18:14:14,427 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 73 [2022-01-31 18:14:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:14,427 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-01-31 18:14:14,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 20 states have internal predecessors, (67), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:14,427 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-01-31 18:14:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 18:14:14,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:14,428 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:14,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:14:14,428 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -843636376, now seen corresponding path program 17 times [2022-01-31 18:14:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133202648] [2022-01-31 18:14:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:14,430 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:14,430 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:14,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:14,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:14,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:14,631 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 18:14:14,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:14,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133202648] [2022-01-31 18:14:14,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133202648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:14,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:14,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:14:14,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779468615] [2022-01-31 18:14:14,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:14,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:14:14,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:14:14,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:14:14,632 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 21 states have internal predecessors, (70), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:15,236 INFO L93 Difference]: Finished difference Result 193 states and 236 transitions. [2022-01-31 18:14:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:14:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 21 states have internal predecessors, (70), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 76 [2022-01-31 18:14:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:15,237 INFO L225 Difference]: With dead ends: 193 [2022-01-31 18:14:15,237 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 18:14:15,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=636, Invalid=1170, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:14:15,238 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 318 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:15,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 31 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 18:14:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 84. [2022-01-31 18:14:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-01-31 18:14:15,252 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2022-01-31 18:14:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:15,252 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-01-31 18:14:15,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 21 states have internal predecessors, (70), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-01-31 18:14:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 18:14:15,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:15,253 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:15,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:14:15,253 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1975669316, now seen corresponding path program 18 times [2022-01-31 18:14:15,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:15,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614522376] [2022-01-31 18:14:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:15,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:15,255 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:15,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:15,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:15,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:15,463 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 18:14:15,463 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:15,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614522376] [2022-01-31 18:14:15,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [614522376] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:15,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:15,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:14:15,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769891383] [2022-01-31 18:14:15,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:15,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:14:15,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:14:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:14:15,464 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:16,133 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2022-01-31 18:14:16,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:14:16,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 79 [2022-01-31 18:14:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:16,134 INFO L225 Difference]: With dead ends: 201 [2022-01-31 18:14:16,134 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 18:14:16,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=1281, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:14:16,135 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 328 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:16,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 33 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:16,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 18:14:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 87. [2022-01-31 18:14:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-01-31 18:14:16,157 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 79 [2022-01-31 18:14:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:16,157 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-01-31 18:14:16,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-01-31 18:14:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 18:14:16,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:16,158 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:16,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:14:16,158 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:16,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:16,158 INFO L85 PathProgramCache]: Analyzing trace with hash -468900888, now seen corresponding path program 19 times [2022-01-31 18:14:16,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:16,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317295167] [2022-01-31 18:14:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:16,161 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:16,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:16,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:16,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:16,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:16,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:16,382 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 18:14:16,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:16,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317295167] [2022-01-31 18:14:16,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317295167] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:16,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:16,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:14:16,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28491933] [2022-01-31 18:14:16,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:16,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:14:16,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:16,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:14:16,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:14:16,383 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 23 states have internal predecessors, (76), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:17,083 INFO L93 Difference]: Finished difference Result 209 states and 256 transitions. [2022-01-31 18:14:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:14:17,083 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 23 states have internal predecessors, (76), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 82 [2022-01-31 18:14:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:17,084 INFO L225 Difference]: With dead ends: 209 [2022-01-31 18:14:17,084 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 18:14:17,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=765, Invalid=1397, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:14:17,085 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 432 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:17,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 25 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 18:14:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 90. [2022-01-31 18:14:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-01-31 18:14:17,101 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 82 [2022-01-31 18:14:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:17,102 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-01-31 18:14:17,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 23 states have internal predecessors, (76), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-01-31 18:14:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 18:14:17,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:17,104 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:17,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:14:17,104 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1194377276, now seen corresponding path program 20 times [2022-01-31 18:14:17,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:17,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452159795] [2022-01-31 18:14:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:17,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:17,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:17,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:17,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:17,354 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 18:14:17,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452159795] [2022-01-31 18:14:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452159795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:17,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:14:17,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424918711] [2022-01-31 18:14:17,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:14:17,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:14:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:14:17,357 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 24 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:18,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:18,137 INFO L93 Difference]: Finished difference Result 217 states and 266 transitions. [2022-01-31 18:14:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:14:18,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 24 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2022-01-31 18:14:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:18,139 INFO L225 Difference]: With dead ends: 217 [2022-01-31 18:14:18,139 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 18:14:18,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:14:18,140 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 439 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:18,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 29 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 18:14:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 93. [2022-01-31 18:14:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-01-31 18:14:18,157 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 85 [2022-01-31 18:14:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:18,157 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-01-31 18:14:18,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 24 states have internal predecessors, (79), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-01-31 18:14:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 18:14:18,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:18,158 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:18,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:14:18,158 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:18,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1586018712, now seen corresponding path program 21 times [2022-01-31 18:14:18,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:18,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960553744] [2022-01-31 18:14:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:18,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:18,160 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:18,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:18,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:18,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:18,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960553744] [2022-01-31 18:14:18,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960553744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:18,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:18,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:14:18,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681815302] [2022-01-31 18:14:18,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:18,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:14:18,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:18,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:14:18,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:14:18,414 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 25 states have internal predecessors, (82), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:19,222 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2022-01-31 18:14:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:14:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 25 states have internal predecessors, (82), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2022-01-31 18:14:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:19,224 INFO L225 Difference]: With dead ends: 225 [2022-01-31 18:14:19,224 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 18:14:19,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=906, Invalid=1644, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:14:19,225 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 437 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:19,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 27 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 18:14:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 96. [2022-01-31 18:14:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-01-31 18:14:19,244 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 88 [2022-01-31 18:14:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:19,244 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-01-31 18:14:19,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 25 states have internal predecessors, (82), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-01-31 18:14:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 18:14:19,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:19,245 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:19,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:14:19,245 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:19,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 450104644, now seen corresponding path program 22 times [2022-01-31 18:14:19,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:19,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960545737] [2022-01-31 18:14:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:19,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:19,246 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:19,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:19,247 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:19,512 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 18:14:19,512 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:19,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960545737] [2022-01-31 18:14:19,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960545737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:19,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:19,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:14:19,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638239923] [2022-01-31 18:14:19,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:19,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:14:19,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:19,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:14:19,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:14:19,514 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:20,373 INFO L93 Difference]: Finished difference Result 233 states and 286 transitions. [2022-01-31 18:14:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:14:20,374 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 91 [2022-01-31 18:14:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:20,375 INFO L225 Difference]: With dead ends: 233 [2022-01-31 18:14:20,375 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 18:14:20,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=981, Invalid=1775, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:14:20,376 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 561 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:20,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 27 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 18:14:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 99. [2022-01-31 18:14:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-01-31 18:14:20,397 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2022-01-31 18:14:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:20,397 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-01-31 18:14:20,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 26 states have internal predecessors, (85), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:20,397 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-01-31 18:14:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 18:14:20,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:20,397 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:20,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:14:20,398 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:20,398 INFO L85 PathProgramCache]: Analyzing trace with hash 777881832, now seen corresponding path program 23 times [2022-01-31 18:14:20,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:20,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448434450] [2022-01-31 18:14:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:20,399 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:20,399 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:20,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:20,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:20,663 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 18:14:20,664 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:20,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448434450] [2022-01-31 18:14:20,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448434450] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:20,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:20,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:14:20,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842156272] [2022-01-31 18:14:20,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:14:20,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:14:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:14:20,665 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 27 states have internal predecessors, (88), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:21,591 INFO L93 Difference]: Finished difference Result 241 states and 296 transitions. [2022-01-31 18:14:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:14:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 27 states have internal predecessors, (88), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 94 [2022-01-31 18:14:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:21,592 INFO L225 Difference]: With dead ends: 241 [2022-01-31 18:14:21,592 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 18:14:21,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1059, Invalid=1911, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:14:21,593 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 438 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:21,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 29 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 18:14:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 102. [2022-01-31 18:14:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-01-31 18:14:21,615 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 94 [2022-01-31 18:14:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:21,615 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-01-31 18:14:21,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 27 states have internal predecessors, (88), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-01-31 18:14:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 18:14:21,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:21,616 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:21,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:14:21,616 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1167541564, now seen corresponding path program 24 times [2022-01-31 18:14:21,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376569004] [2022-01-31 18:14:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:21,619 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:21,619 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:21,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:21,620 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:21,897 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 18:14:21,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:21,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376569004] [2022-01-31 18:14:21,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1376569004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:21,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:21,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:14:21,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162838013] [2022-01-31 18:14:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:21,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:14:21,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:21,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:14:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:14:21,898 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 28 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:22,825 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2022-01-31 18:14:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:14:22,825 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 28 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 97 [2022-01-31 18:14:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:22,826 INFO L225 Difference]: With dead ends: 249 [2022-01-31 18:14:22,826 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 18:14:22,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1140, Invalid=2052, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:14:22,827 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 516 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:22,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 25 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:14:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 18:14:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 105. [2022-01-31 18:14:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-01-31 18:14:22,853 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 97 [2022-01-31 18:14:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:22,854 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-01-31 18:14:22,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 28 states have internal predecessors, (91), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-01-31 18:14:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 18:14:22,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:22,855 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:22,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:14:22,855 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -987239576, now seen corresponding path program 25 times [2022-01-31 18:14:22,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701002421] [2022-01-31 18:14:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:22,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:22,857 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:22,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:22,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:23,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:23,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:23,172 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 18:14:23,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701002421] [2022-01-31 18:14:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [701002421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:23,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:23,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:14:23,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724376686] [2022-01-31 18:14:23,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:23,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:14:23,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:14:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:14:23,173 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 29 states have internal predecessors, (94), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:24,233 INFO L93 Difference]: Finished difference Result 257 states and 316 transitions. [2022-01-31 18:14:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:14:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 29 states have internal predecessors, (94), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 100 [2022-01-31 18:14:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:24,234 INFO L225 Difference]: With dead ends: 257 [2022-01-31 18:14:24,234 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 18:14:24,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1224, Invalid=2198, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:14:24,236 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 476 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:24,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 31 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 18:14:24,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 108. [2022-01-31 18:14:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-01-31 18:14:24,267 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 100 [2022-01-31 18:14:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:24,267 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-01-31 18:14:24,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 29 states have internal predecessors, (94), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-01-31 18:14:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 18:14:24,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:24,268 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:24,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:14:24,268 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1680164932, now seen corresponding path program 26 times [2022-01-31 18:14:24,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313546619] [2022-01-31 18:14:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:24,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:24,270 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:24,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:24,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:24,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:24,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:24,609 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 18:14:24,609 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:24,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313546619] [2022-01-31 18:14:24,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313546619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:24,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:24,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:14:24,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889159004] [2022-01-31 18:14:24,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:24,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:14:24,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:24,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:14:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:14:24,611 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 30 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:25,704 INFO L93 Difference]: Finished difference Result 265 states and 326 transitions. [2022-01-31 18:14:25,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:14:25,705 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 30 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 103 [2022-01-31 18:14:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:25,706 INFO L225 Difference]: With dead ends: 265 [2022-01-31 18:14:25,706 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 18:14:25,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1311, Invalid=2349, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:14:25,707 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 468 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:25,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 33 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:25,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 18:14:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 111. [2022-01-31 18:14:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-01-31 18:14:25,733 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 103 [2022-01-31 18:14:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:25,733 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-01-31 18:14:25,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 30 states have internal predecessors, (97), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-01-31 18:14:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 18:14:25,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:25,734 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:25,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:14:25,734 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 842952168, now seen corresponding path program 27 times [2022-01-31 18:14:25,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515655164] [2022-01-31 18:14:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:25,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:25,736 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:25,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:25,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:26,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:26,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:26,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515655164] [2022-01-31 18:14:26,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515655164] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:26,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:26,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:14:26,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182642050] [2022-01-31 18:14:26,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:26,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:14:26,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:26,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:14:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:14:26,070 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:27,285 INFO L93 Difference]: Finished difference Result 273 states and 336 transitions. [2022-01-31 18:14:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:14:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 106 [2022-01-31 18:14:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:27,287 INFO L225 Difference]: With dead ends: 273 [2022-01-31 18:14:27,287 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 18:14:27,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1401, Invalid=2505, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:14:27,288 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 536 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:27,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 27 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 18:14:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 114. [2022-01-31 18:14:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-01-31 18:14:27,316 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 106 [2022-01-31 18:14:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:27,316 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-01-31 18:14:27,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-01-31 18:14:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 18:14:27,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:27,317 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:27,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:14:27,317 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash 312587716, now seen corresponding path program 28 times [2022-01-31 18:14:27,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:27,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032212910] [2022-01-31 18:14:27,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:27,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:27,319 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:27,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:27,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:27,688 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 18:14:27,688 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032212910] [2022-01-31 18:14:27,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1032212910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:27,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:27,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:14:27,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743165314] [2022-01-31 18:14:27,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:27,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:14:27,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:27,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:14:27,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:14:27,689 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 32 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:28,970 INFO L93 Difference]: Finished difference Result 281 states and 346 transitions. [2022-01-31 18:14:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:14:28,971 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 32 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 109 [2022-01-31 18:14:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:28,972 INFO L225 Difference]: With dead ends: 281 [2022-01-31 18:14:28,972 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 18:14:28,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1494, Invalid=2666, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:14:28,973 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 506 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:28,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 35 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 18:14:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 117. [2022-01-31 18:14:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-01-31 18:14:29,002 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 109 [2022-01-31 18:14:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:29,003 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-01-31 18:14:29,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 32 states have internal predecessors, (103), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-01-31 18:14:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 18:14:29,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:29,003 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:29,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:14:29,004 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1409880168, now seen corresponding path program 29 times [2022-01-31 18:14:29,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:29,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720878659] [2022-01-31 18:14:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:29,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:29,005 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:29,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:29,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:29,372 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 18:14:29,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720878659] [2022-01-31 18:14:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720878659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:29,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:29,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:14:29,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185777632] [2022-01-31 18:14:29,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:29,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:14:29,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:29,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:14:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:14:29,374 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 35 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 33 states have internal predecessors, (106), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:30,658 INFO L93 Difference]: Finished difference Result 289 states and 356 transitions. [2022-01-31 18:14:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:14:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 33 states have internal predecessors, (106), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 112 [2022-01-31 18:14:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:30,659 INFO L225 Difference]: With dead ends: 289 [2022-01-31 18:14:30,659 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 18:14:30,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1590, Invalid=2832, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:14:30,660 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 621 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:30,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 27 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 18:14:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 120. [2022-01-31 18:14:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-01-31 18:14:30,692 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 112 [2022-01-31 18:14:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:30,692 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-01-31 18:14:30,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.0285714285714285) internal successors, (106), 33 states have internal predecessors, (106), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-01-31 18:14:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 18:14:30,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:30,693 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:30,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:14:30,693 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1853227844, now seen corresponding path program 30 times [2022-01-31 18:14:30,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673217487] [2022-01-31 18:14:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:30,694 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:30,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:30,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:30,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:31,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:31,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:31,068 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 18:14:31,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:31,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673217487] [2022-01-31 18:14:31,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673217487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:31,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:31,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:14:31,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944208612] [2022-01-31 18:14:31,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:31,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:14:31,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:14:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:14:31,069 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 34 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:32,478 INFO L93 Difference]: Finished difference Result 297 states and 366 transitions. [2022-01-31 18:14:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:14:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 34 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 115 [2022-01-31 18:14:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:32,480 INFO L225 Difference]: With dead ends: 297 [2022-01-31 18:14:32,480 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 18:14:32,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1689, Invalid=3003, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:14:32,480 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 737 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:32,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 27 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 18:14:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 123. [2022-01-31 18:14:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-01-31 18:14:32,517 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 115 [2022-01-31 18:14:32,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:32,517 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-01-31 18:14:32,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 34 states have internal predecessors, (109), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-01-31 18:14:32,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 18:14:32,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:32,518 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:32,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:14:32,518 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1695558936, now seen corresponding path program 31 times [2022-01-31 18:14:32,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:32,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105802593] [2022-01-31 18:14:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:32,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:32,519 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:32,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:32,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:32,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:32,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:32,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:32,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105802593] [2022-01-31 18:14:32,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2105802593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:32,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:32,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:14:32,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099731755] [2022-01-31 18:14:32,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:32,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:14:32,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:14:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:14:32,917 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 35 states have internal predecessors, (112), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:34,494 INFO L93 Difference]: Finished difference Result 305 states and 376 transitions. [2022-01-31 18:14:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:14:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 35 states have internal predecessors, (112), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2022-01-31 18:14:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:34,496 INFO L225 Difference]: With dead ends: 305 [2022-01-31 18:14:34,496 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 18:14:34,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1791, Invalid=3179, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:14:34,497 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 573 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:34,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 31 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 18:14:34,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 126. [2022-01-31 18:14:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-01-31 18:14:34,532 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 118 [2022-01-31 18:14:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:34,532 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-01-31 18:14:34,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.027027027027027) internal successors, (112), 35 states have internal predecessors, (112), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-01-31 18:14:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 18:14:34,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:34,533 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:34,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:14:34,533 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1312436420, now seen corresponding path program 32 times [2022-01-31 18:14:34,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:34,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368582575] [2022-01-31 18:14:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:34,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:34,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:34,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:34,537 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:34,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:34,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:34,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:34,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368582575] [2022-01-31 18:14:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [368582575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:34,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:14:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668730887] [2022-01-31 18:14:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:34,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:14:34,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:14:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:14:34,950 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 36 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:36,597 INFO L93 Difference]: Finished difference Result 313 states and 386 transitions. [2022-01-31 18:14:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:14:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 36 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 121 [2022-01-31 18:14:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:36,598 INFO L225 Difference]: With dead ends: 313 [2022-01-31 18:14:36,598 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 18:14:36,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1896, Invalid=3360, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:14:36,599 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 595 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:36,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 33 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 18:14:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 129. [2022-01-31 18:14:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 121 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-01-31 18:14:36,636 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 121 [2022-01-31 18:14:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-01-31 18:14:36,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 36 states have internal predecessors, (115), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-01-31 18:14:36,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 18:14:36,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:36,636 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:36,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:14:36,637 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1990544024, now seen corresponding path program 33 times [2022-01-31 18:14:36,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:36,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515366339] [2022-01-31 18:14:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:36,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:36,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:36,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:36,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:37,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:37,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:37,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515366339] [2022-01-31 18:14:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [515366339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:37,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:37,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:14:37,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270526422] [2022-01-31 18:14:37,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:37,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:14:37,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:14:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:14:37,118 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 37 states have internal predecessors, (118), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:38,799 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-01-31 18:14:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:14:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 37 states have internal predecessors, (118), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 124 [2022-01-31 18:14:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:38,801 INFO L225 Difference]: With dead ends: 321 [2022-01-31 18:14:38,801 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 18:14:38,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2004, Invalid=3546, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:14:38,802 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 628 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:38,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 27 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 18:14:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 132. [2022-01-31 18:14:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-01-31 18:14:38,841 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 124 [2022-01-31 18:14:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:38,841 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-01-31 18:14:38,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 37 states have internal predecessors, (118), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-01-31 18:14:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 18:14:38,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:38,842 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:38,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:14:38,842 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:38,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:38,842 INFO L85 PathProgramCache]: Analyzing trace with hash 914767428, now seen corresponding path program 34 times [2022-01-31 18:14:38,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:38,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810096438] [2022-01-31 18:14:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:38,844 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:38,844 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:38,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:38,845 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:39,259 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810096438] [2022-01-31 18:14:39,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [810096438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:39,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:39,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:14:39,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249708517] [2022-01-31 18:14:39,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:39,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:14:39,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:14:39,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:14:39,260 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 38 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:41,054 INFO L93 Difference]: Finished difference Result 329 states and 406 transitions. [2022-01-31 18:14:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:14:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 38 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 127 [2022-01-31 18:14:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:41,056 INFO L225 Difference]: With dead ends: 329 [2022-01-31 18:14:41,056 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 18:14:41,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2115, Invalid=3737, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:14:41,057 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 660 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:41,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 31 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:14:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 18:14:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 135. [2022-01-31 18:14:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-01-31 18:14:41,098 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 127 [2022-01-31 18:14:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:41,098 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-01-31 18:14:41,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 38 states have internal predecessors, (121), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-01-31 18:14:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 18:14:41,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:41,099 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:41,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:14:41,099 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash 867284968, now seen corresponding path program 35 times [2022-01-31 18:14:41,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377521975] [2022-01-31 18:14:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:41,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:41,101 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:41,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:41,102 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:41,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:41,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:41,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377521975] [2022-01-31 18:14:41,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377521975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:41,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:41,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:14:41,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242463005] [2022-01-31 18:14:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:41,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:14:41,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:14:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:14:41,609 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 39 states have internal predecessors, (124), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:43,538 INFO L93 Difference]: Finished difference Result 337 states and 416 transitions. [2022-01-31 18:14:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:14:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 39 states have internal predecessors, (124), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 130 [2022-01-31 18:14:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:43,540 INFO L225 Difference]: With dead ends: 337 [2022-01-31 18:14:43,540 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 18:14:43,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2229, Invalid=3933, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:14:43,541 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 727 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:43,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 29 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 18:14:43,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 138. [2022-01-31 18:14:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-01-31 18:14:43,584 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 130 [2022-01-31 18:14:43,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:43,584 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-01-31 18:14:43,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 39 states have internal predecessors, (124), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-01-31 18:14:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 18:14:43,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:43,585 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:43,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:14:43,585 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash -638440508, now seen corresponding path program 36 times [2022-01-31 18:14:43,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:43,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62615062] [2022-01-31 18:14:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:43,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:43,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:43,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:43,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:44,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:44,114 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 18:14:44,114 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:44,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62615062] [2022-01-31 18:14:44,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [62615062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:44,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:44,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:14:44,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036127063] [2022-01-31 18:14:44,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:44,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:14:44,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:14:44,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:14:44,116 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:46,130 INFO L93 Difference]: Finished difference Result 345 states and 426 transitions. [2022-01-31 18:14:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:14:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 133 [2022-01-31 18:14:46,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:46,132 INFO L225 Difference]: With dead ends: 345 [2022-01-31 18:14:46,132 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 18:14:46,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2346, Invalid=4134, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:14:46,133 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 737 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:46,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 31 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 18:14:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 141. [2022-01-31 18:14:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-01-31 18:14:46,184 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 133 [2022-01-31 18:14:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:46,184 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-01-31 18:14:46,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0238095238095237) internal successors, (127), 40 states have internal predecessors, (127), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-01-31 18:14:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 18:14:46,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:46,185 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:46,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:14:46,185 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:46,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1067656600, now seen corresponding path program 37 times [2022-01-31 18:14:46,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:46,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414698812] [2022-01-31 18:14:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:46,188 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:46,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:46,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:46,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:46,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:46,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:46,726 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 18:14:46,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414698812] [2022-01-31 18:14:46,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1414698812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:46,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:46,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:14:46,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850296316] [2022-01-31 18:14:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:46,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:14:46,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:14:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:14:46,728 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 41 states have internal predecessors, (130), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:48,850 INFO L93 Difference]: Finished difference Result 353 states and 436 transitions. [2022-01-31 18:14:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:14:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 41 states have internal predecessors, (130), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 136 [2022-01-31 18:14:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:48,851 INFO L225 Difference]: With dead ends: 353 [2022-01-31 18:14:48,851 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 18:14:48,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2466, Invalid=4340, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:14:48,852 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 769 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:48,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 31 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 18:14:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 144. [2022-01-31 18:14:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-01-31 18:14:48,900 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 136 [2022-01-31 18:14:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:48,900 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-01-31 18:14:48,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0232558139534884) internal successors, (130), 41 states have internal predecessors, (130), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-01-31 18:14:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 18:14:48,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:48,901 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:48,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:14:48,901 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:48,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1726613180, now seen corresponding path program 38 times [2022-01-31 18:14:48,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:48,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388259380] [2022-01-31 18:14:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:48,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:48,904 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:48,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:48,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:49,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:49,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:49,463 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 18:14:49,463 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:49,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388259380] [2022-01-31 18:14:49,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [388259380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:49,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:49,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:14:49,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191490771] [2022-01-31 18:14:49,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:49,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:14:49,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:14:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:14:49,465 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 42 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:51,679 INFO L93 Difference]: Finished difference Result 361 states and 446 transitions. [2022-01-31 18:14:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:14:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 42 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 139 [2022-01-31 18:14:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:51,681 INFO L225 Difference]: With dead ends: 361 [2022-01-31 18:14:51,681 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 18:14:51,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2589, Invalid=4551, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:14:51,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 746 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:51,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 31 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 18:14:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 147. [2022-01-31 18:14:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-01-31 18:14:51,732 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 139 [2022-01-31 18:14:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:51,732 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-01-31 18:14:51,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 42 states have internal predecessors, (133), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-01-31 18:14:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 18:14:51,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:51,733 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:51,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:14:51,733 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash -406577944, now seen corresponding path program 39 times [2022-01-31 18:14:51,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:51,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339101517] [2022-01-31 18:14:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:51,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:51,741 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:51,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:51,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:52,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:52,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:14:52,381 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:52,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339101517] [2022-01-31 18:14:52,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [339101517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:52,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:52,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:14:52,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415442278] [2022-01-31 18:14:52,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:52,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:14:52,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:52,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:14:52,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:14:52,383 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 43 states have internal predecessors, (136), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:54,789 INFO L93 Difference]: Finished difference Result 369 states and 456 transitions. [2022-01-31 18:14:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:14:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 43 states have internal predecessors, (136), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 142 [2022-01-31 18:14:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:54,790 INFO L225 Difference]: With dead ends: 369 [2022-01-31 18:14:54,790 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 18:14:54,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2715, Invalid=4767, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:14:54,791 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 946 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:54,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [948 Valid, 27 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 18:14:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 150. [2022-01-31 18:14:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-01-31 18:14:54,844 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 142 [2022-01-31 18:14:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:54,844 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-01-31 18:14:54,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.022222222222222) internal successors, (136), 43 states have internal predecessors, (136), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-01-31 18:14:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 18:14:54,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:54,845 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:54,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:14:54,845 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:54,845 INFO L85 PathProgramCache]: Analyzing trace with hash 42575556, now seen corresponding path program 40 times [2022-01-31 18:14:54,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:54,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481277073] [2022-01-31 18:14:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:54,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:54,847 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:54,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:54,848 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:55,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:55,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:55,460 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 18:14:55,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481277073] [2022-01-31 18:14:55,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481277073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:55,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:55,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:14:55,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892006618] [2022-01-31 18:14:55,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:55,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:14:55,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:14:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:14:55,461 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 44 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:14:57,951 INFO L93 Difference]: Finished difference Result 377 states and 466 transitions. [2022-01-31 18:14:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:14:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 44 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 145 [2022-01-31 18:14:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:14:57,953 INFO L225 Difference]: With dead ends: 377 [2022-01-31 18:14:57,953 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 18:14:57,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2844, Invalid=4988, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:14:57,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 774 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:14:57,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 29 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:14:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 18:14:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 153. [2022-01-31 18:14:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:14:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-01-31 18:14:58,012 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 145 [2022-01-31 18:14:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:14:58,013 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-01-31 18:14:58,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0217391304347827) internal successors, (139), 44 states have internal predecessors, (139), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:14:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-01-31 18:14:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 18:14:58,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:14:58,013 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:14:58,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:14:58,014 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:14:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:14:58,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1951367016, now seen corresponding path program 41 times [2022-01-31 18:14:58,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:14:58,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050174702] [2022-01-31 18:14:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:14:58,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:14:58,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:14:58,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:14:58,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:14:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:58,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:14:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:14:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:14:58,680 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 18:14:58,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:14:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050174702] [2022-01-31 18:14:58,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050174702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:14:58,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:14:58,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:14:58,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710609448] [2022-01-31 18:14:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:14:58,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:14:58,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:14:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:14:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:14:58,682 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 45 states have internal predecessors, (142), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:01,383 INFO L93 Difference]: Finished difference Result 385 states and 476 transitions. [2022-01-31 18:15:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:15:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 45 states have internal predecessors, (142), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 148 [2022-01-31 18:15:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:01,384 INFO L225 Difference]: With dead ends: 385 [2022-01-31 18:15:01,384 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 18:15:01,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2976, Invalid=5214, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:15:01,385 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 818 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:01,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 29 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 18:15:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 156. [2022-01-31 18:15:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-01-31 18:15:01,443 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 148 [2022-01-31 18:15:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:01,444 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-01-31 18:15:01,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 45 states have internal predecessors, (142), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-01-31 18:15:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 18:15:01,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:01,444 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:01,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:15:01,444 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1390752836, now seen corresponding path program 42 times [2022-01-31 18:15:01,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:01,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543879494] [2022-01-31 18:15:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:01,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:01,456 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:01,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:01,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:02,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:02,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:02,244 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 18:15:02,244 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:02,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543879494] [2022-01-31 18:15:02,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1543879494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:02,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:02,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:15:02,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875435723] [2022-01-31 18:15:02,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:02,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:15:02,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:15:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:15:02,245 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 46 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:05,314 INFO L93 Difference]: Finished difference Result 393 states and 486 transitions. [2022-01-31 18:15:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:15:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 46 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 151 [2022-01-31 18:15:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:05,316 INFO L225 Difference]: With dead ends: 393 [2022-01-31 18:15:05,316 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 18:15:05,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3111, Invalid=5445, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:15:05,317 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 873 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:05,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 27 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 18:15:05,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 159. [2022-01-31 18:15:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-01-31 18:15:05,382 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 151 [2022-01-31 18:15:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:05,382 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-01-31 18:15:05,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 46 states have internal predecessors, (145), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-01-31 18:15:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 18:15:05,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:05,383 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:05,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:15:05,383 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:05,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1033436696, now seen corresponding path program 43 times [2022-01-31 18:15:05,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:05,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999055470] [2022-01-31 18:15:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:05,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:05,385 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:05,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:05,386 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:06,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:06,094 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 18:15:06,094 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999055470] [2022-01-31 18:15:06,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [999055470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:06,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:06,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:15:06,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393543481] [2022-01-31 18:15:06,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:06,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:15:06,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:15:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:15:06,095 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:09,074 INFO L93 Difference]: Finished difference Result 401 states and 496 transitions. [2022-01-31 18:15:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:15:09,075 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 154 [2022-01-31 18:15:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:09,076 INFO L225 Difference]: With dead ends: 401 [2022-01-31 18:15:09,076 INFO L226 Difference]: Without dead ends: 389 [2022-01-31 18:15:09,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3249, Invalid=5681, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:15:09,077 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 920 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:09,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 27 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:15:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-01-31 18:15:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 162. [2022-01-31 18:15:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-01-31 18:15:09,140 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 154 [2022-01-31 18:15:09,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:09,141 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-01-31 18:15:09,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-01-31 18:15:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 18:15:09,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:09,141 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:09,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:15:09,141 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash -188702268, now seen corresponding path program 44 times [2022-01-31 18:15:09,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:09,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870861962] [2022-01-31 18:15:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:09,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:09,143 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:09,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:09,145 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:09,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:09,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:09,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870861962] [2022-01-31 18:15:09,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [870861962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:09,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:09,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:15:09,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225576067] [2022-01-31 18:15:09,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:09,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:15:09,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:09,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:15:09,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:15:09,914 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 50 states, 50 states have (on average 3.02) internal successors, (151), 48 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:13,121 INFO L93 Difference]: Finished difference Result 409 states and 506 transitions. [2022-01-31 18:15:13,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:15:13,121 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.02) internal successors, (151), 48 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 157 [2022-01-31 18:15:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:13,123 INFO L225 Difference]: With dead ends: 409 [2022-01-31 18:15:13,123 INFO L226 Difference]: Without dead ends: 397 [2022-01-31 18:15:13,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3390, Invalid=5922, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:15:13,123 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 881 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:13,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 29 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-31 18:15:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 165. [2022-01-31 18:15:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-01-31 18:15:13,198 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 157 [2022-01-31 18:15:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:13,198 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-01-31 18:15:13,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.02) internal successors, (151), 48 states have internal predecessors, (151), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-01-31 18:15:13,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 18:15:13,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:13,199 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:13,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:15:13,199 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1081255016, now seen corresponding path program 45 times [2022-01-31 18:15:13,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:13,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342159747] [2022-01-31 18:15:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:13,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:13,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:13,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:13,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:13,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:13,931 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 18:15:13,932 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:13,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342159747] [2022-01-31 18:15:13,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342159747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:13,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:13,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:15:13,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570134216] [2022-01-31 18:15:13,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:13,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:15:13,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:15:13,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:15:13,933 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 49 states have internal predecessors, (154), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:17,337 INFO L93 Difference]: Finished difference Result 417 states and 516 transitions. [2022-01-31 18:15:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:15:17,337 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 49 states have internal predecessors, (154), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 160 [2022-01-31 18:15:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:17,339 INFO L225 Difference]: With dead ends: 417 [2022-01-31 18:15:17,339 INFO L226 Difference]: Without dead ends: 405 [2022-01-31 18:15:17,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3534, Invalid=6168, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:15:17,339 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 859 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:17,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 31 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-31 18:15:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 168. [2022-01-31 18:15:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2022-01-31 18:15:17,413 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 160 [2022-01-31 18:15:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:17,414 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2022-01-31 18:15:17,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.019607843137255) internal successors, (154), 49 states have internal predecessors, (154), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2022-01-31 18:15:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 18:15:17,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:17,414 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:17,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:15:17,415 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash 11792196, now seen corresponding path program 46 times [2022-01-31 18:15:17,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:17,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998346029] [2022-01-31 18:15:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:17,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:17,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:17,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:17,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:18,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:18,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:18,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:18,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998346029] [2022-01-31 18:15:18,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1998346029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:18,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:18,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:15:18,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123376481] [2022-01-31 18:15:18,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:18,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:15:18,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:15:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:15:18,203 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 50 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:21,770 INFO L93 Difference]: Finished difference Result 425 states and 526 transitions. [2022-01-31 18:15:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:15:21,771 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 50 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-01-31 18:15:21,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:21,772 INFO L225 Difference]: With dead ends: 425 [2022-01-31 18:15:21,772 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 18:15:21,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3681, Invalid=6419, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:15:21,773 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 779 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:21,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 35 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 18:15:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 171. [2022-01-31 18:15:21,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 163 states have (on average 1.0245398773006136) internal successors, (167), 163 states have internal predecessors, (167), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-01-31 18:15:21,844 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 163 [2022-01-31 18:15:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:21,845 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-01-31 18:15:21,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 50 states have internal predecessors, (157), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-01-31 18:15:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 18:15:21,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:21,845 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:21,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:15:21,845 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash -287676696, now seen corresponding path program 47 times [2022-01-31 18:15:21,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:21,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059486803] [2022-01-31 18:15:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:21,848 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:21,848 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:21,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:21,849 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:22,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:22,646 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 18:15:22,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059486803] [2022-01-31 18:15:22,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059486803] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:22,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:22,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:15:22,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425870125] [2022-01-31 18:15:22,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:22,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:15:22,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:15:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:15:22,648 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 51 states have internal predecessors, (160), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:26,297 INFO L93 Difference]: Finished difference Result 433 states and 536 transitions. [2022-01-31 18:15:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:15:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 51 states have internal predecessors, (160), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 166 [2022-01-31 18:15:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:26,299 INFO L225 Difference]: With dead ends: 433 [2022-01-31 18:15:26,299 INFO L226 Difference]: Without dead ends: 421 [2022-01-31 18:15:26,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3831, Invalid=6675, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 18:15:26,300 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 862 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:26,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 39 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-31 18:15:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 174. [2022-01-31 18:15:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2022-01-31 18:15:26,374 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 166 [2022-01-31 18:15:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:26,374 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2022-01-31 18:15:26,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.018867924528302) internal successors, (160), 51 states have internal predecessors, (160), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2022-01-31 18:15:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 18:15:26,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:26,375 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:26,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:15:26,375 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:26,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1118364476, now seen corresponding path program 48 times [2022-01-31 18:15:26,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:26,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591418412] [2022-01-31 18:15:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:26,376 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:26,376 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:26,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:26,378 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:27,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:27,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:15:27,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:27,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591418412] [2022-01-31 18:15:27,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591418412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:27,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:27,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:15:27,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111263655] [2022-01-31 18:15:27,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:27,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:15:27,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:27,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:15:27,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:15:27,260 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 54 states, 54 states have (on average 3.0185185185185186) internal successors, (163), 52 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:31,059 INFO L93 Difference]: Finished difference Result 441 states and 546 transitions. [2022-01-31 18:15:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:15:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.0185185185185186) internal successors, (163), 52 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 169 [2022-01-31 18:15:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:31,061 INFO L225 Difference]: With dead ends: 441 [2022-01-31 18:15:31,061 INFO L226 Difference]: Without dead ends: 429 [2022-01-31 18:15:31,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3984, Invalid=6936, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 18:15:31,062 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1018 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:31,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 27 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-31 18:15:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 177. [2022-01-31 18:15:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 169 states have (on average 1.0236686390532543) internal successors, (173), 169 states have internal predecessors, (173), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-01-31 18:15:31,146 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 169 [2022-01-31 18:15:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:31,146 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-01-31 18:15:31,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.0185185185185186) internal successors, (163), 52 states have internal predecessors, (163), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-01-31 18:15:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 18:15:31,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:31,147 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:31,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:15:31,147 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash -536458904, now seen corresponding path program 49 times [2022-01-31 18:15:31,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:31,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059620811] [2022-01-31 18:15:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:31,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:31,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:31,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:31,150 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:32,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:32,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:32,051 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 18:15:32,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:32,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059620811] [2022-01-31 18:15:32,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1059620811] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:32,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:32,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:15:32,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863622339] [2022-01-31 18:15:32,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:15:32,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:15:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:15:32,053 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 53 states have internal predecessors, (166), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:36,104 INFO L93 Difference]: Finished difference Result 449 states and 556 transitions. [2022-01-31 18:15:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:15:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 53 states have internal predecessors, (166), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 172 [2022-01-31 18:15:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:36,105 INFO L225 Difference]: With dead ends: 449 [2022-01-31 18:15:36,105 INFO L226 Difference]: Without dead ends: 437 [2022-01-31 18:15:36,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4140, Invalid=7202, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 18:15:36,106 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 938 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:36,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 35 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-01-31 18:15:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 180. [2022-01-31 18:15:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-01-31 18:15:36,191 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 172 [2022-01-31 18:15:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:36,191 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-01-31 18:15:36,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 53 states have internal predecessors, (166), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-01-31 18:15:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 18:15:36,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:36,192 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:36,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:15:36,192 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 524429892, now seen corresponding path program 50 times [2022-01-31 18:15:36,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:36,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100761953] [2022-01-31 18:15:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:36,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:36,194 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:36,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:36,195 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:37,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:37,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:37,086 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 18:15:37,086 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:37,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100761953] [2022-01-31 18:15:37,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100761953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:37,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:37,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:15:37,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491623480] [2022-01-31 18:15:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:37,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:15:37,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:15:37,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:15:37,088 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 56 states, 56 states have (on average 3.017857142857143) internal successors, (169), 54 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:41,328 INFO L93 Difference]: Finished difference Result 457 states and 566 transitions. [2022-01-31 18:15:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:15:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.017857142857143) internal successors, (169), 54 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 175 [2022-01-31 18:15:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:41,330 INFO L225 Difference]: With dead ends: 457 [2022-01-31 18:15:41,330 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 18:15:41,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4299, Invalid=7473, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 18:15:41,331 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1079 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:41,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 27 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 18:15:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 183. [2022-01-31 18:15:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-01-31 18:15:41,416 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 175 [2022-01-31 18:15:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:41,416 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-01-31 18:15:41,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.017857142857143) internal successors, (169), 54 states have internal predecessors, (169), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-01-31 18:15:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 18:15:41,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:41,417 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:41,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:15:41,417 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:41,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1201779736, now seen corresponding path program 51 times [2022-01-31 18:15:41,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:41,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208064936] [2022-01-31 18:15:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:41,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:41,419 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:41,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:41,420 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:42,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:42,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:42,349 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 18:15:42,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:42,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208064936] [2022-01-31 18:15:42,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [208064936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:42,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:42,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:15:42,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528176207] [2022-01-31 18:15:42,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:42,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:15:42,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:42,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:15:42,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:15:42,351 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 57 states, 57 states have (on average 3.017543859649123) internal successors, (172), 55 states have internal predecessors, (172), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:46,826 INFO L93 Difference]: Finished difference Result 465 states and 576 transitions. [2022-01-31 18:15:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:15:46,827 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.017543859649123) internal successors, (172), 55 states have internal predecessors, (172), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 178 [2022-01-31 18:15:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:46,828 INFO L225 Difference]: With dead ends: 465 [2022-01-31 18:15:46,828 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 18:15:46,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4461, Invalid=7749, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 18:15:46,829 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1132 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:46,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 29 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 18:15:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 186. [2022-01-31 18:15:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 189 transitions. [2022-01-31 18:15:46,917 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 189 transitions. Word has length 178 [2022-01-31 18:15:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:46,917 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 189 transitions. [2022-01-31 18:15:46,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.017543859649123) internal successors, (172), 55 states have internal predecessors, (172), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 189 transitions. [2022-01-31 18:15:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 18:15:46,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:46,918 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:46,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:15:46,918 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:46,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1225594820, now seen corresponding path program 52 times [2022-01-31 18:15:46,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:46,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768929816] [2022-01-31 18:15:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:46,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:46,928 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:46,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:46,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:47,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:47,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:47,866 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 18:15:47,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:47,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768929816] [2022-01-31 18:15:47,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1768929816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:47,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:47,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:15:47,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027248073] [2022-01-31 18:15:47,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:47,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:15:47,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:47,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:15:47,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:15:47,867 INFO L87 Difference]: Start difference. First operand 186 states and 189 transitions. Second operand has 58 states, 58 states have (on average 3.0172413793103448) internal successors, (175), 56 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:52,470 INFO L93 Difference]: Finished difference Result 473 states and 586 transitions. [2022-01-31 18:15:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:15:52,471 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.0172413793103448) internal successors, (175), 56 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 181 [2022-01-31 18:15:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:52,472 INFO L225 Difference]: With dead ends: 473 [2022-01-31 18:15:52,472 INFO L226 Difference]: Without dead ends: 461 [2022-01-31 18:15:52,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4626, Invalid=8030, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 18:15:52,473 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 998 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:52,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 29 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-31 18:15:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 189. [2022-01-31 18:15:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 181 states have (on average 1.022099447513812) internal successors, (185), 181 states have internal predecessors, (185), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-01-31 18:15:52,564 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 181 [2022-01-31 18:15:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:52,564 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-01-31 18:15:52,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.0172413793103448) internal successors, (175), 56 states have internal predecessors, (175), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-01-31 18:15:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 18:15:52,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:52,565 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:52,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:15:52,565 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash 776629864, now seen corresponding path program 53 times [2022-01-31 18:15:52,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:52,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362325807] [2022-01-31 18:15:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:52,567 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:52,567 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:52,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:52,569 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:53,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:53,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:53,566 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 18:15:53,566 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:53,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362325807] [2022-01-31 18:15:53,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [362325807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:53,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:53,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:15:53,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179463112] [2022-01-31 18:15:53,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:53,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:15:53,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:15:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:15:53,568 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 59 states, 59 states have (on average 3.016949152542373) internal successors, (178), 57 states have internal predecessors, (178), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:58,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:15:58,463 INFO L93 Difference]: Finished difference Result 481 states and 596 transitions. [2022-01-31 18:15:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:15:58,463 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.016949152542373) internal successors, (178), 57 states have internal predecessors, (178), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 184 [2022-01-31 18:15:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:15:58,465 INFO L225 Difference]: With dead ends: 481 [2022-01-31 18:15:58,465 INFO L226 Difference]: Without dead ends: 469 [2022-01-31 18:15:58,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4794, Invalid=8316, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 18:15:58,466 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1247 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:15:58,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 23 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:15:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-31 18:15:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 192. [2022-01-31 18:15:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 184 states have internal predecessors, (188), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:15:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2022-01-31 18:15:58,572 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 184 [2022-01-31 18:15:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:15:58,572 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2022-01-31 18:15:58,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.016949152542373) internal successors, (178), 57 states have internal predecessors, (178), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:15:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2022-01-31 18:15:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 18:15:58,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:15:58,573 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:15:58,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:15:58,573 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:15:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:15:58,574 INFO L85 PathProgramCache]: Analyzing trace with hash 189785412, now seen corresponding path program 54 times [2022-01-31 18:15:58,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:15:58,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383856796] [2022-01-31 18:15:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:15:58,575 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:15:58,575 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:15:58,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:15:58,576 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:15:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:59,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:15:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:15:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:15:59,558 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 18:15:59,558 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:15:59,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383856796] [2022-01-31 18:15:59,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [383856796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:15:59,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:15:59,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:15:59,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111588434] [2022-01-31 18:15:59,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:15:59,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:15:59,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:15:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:15:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:15:59,560 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand has 60 states, 60 states have (on average 3.0166666666666666) internal successors, (181), 58 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:04,678 INFO L93 Difference]: Finished difference Result 489 states and 606 transitions. [2022-01-31 18:16:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:16:04,678 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.0166666666666666) internal successors, (181), 58 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 187 [2022-01-31 18:16:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:04,680 INFO L225 Difference]: With dead ends: 489 [2022-01-31 18:16:04,680 INFO L226 Difference]: Without dead ends: 477 [2022-01-31 18:16:04,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4965, Invalid=8607, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 18:16:04,680 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1062 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:04,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1064 Valid, 31 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-31 18:16:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 195. [2022-01-31 18:16:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 187 states have (on average 1.0213903743315509) internal successors, (191), 187 states have internal predecessors, (191), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-01-31 18:16:04,779 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 187 [2022-01-31 18:16:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:04,780 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-01-31 18:16:04,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.0166666666666666) internal successors, (181), 58 states have internal predecessors, (181), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-01-31 18:16:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 18:16:04,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:04,780 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:04,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:16:04,781 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1976389400, now seen corresponding path program 55 times [2022-01-31 18:16:04,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709835330] [2022-01-31 18:16:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:04,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:04,782 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:04,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:04,783 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:05,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:05,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:05,840 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 18:16:05,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:05,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709835330] [2022-01-31 18:16:05,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [709835330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:05,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:05,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:16:05,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387347041] [2022-01-31 18:16:05,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:05,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:16:05,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:16:05,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:16:05,842 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 59 states have internal predecessors, (184), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:11,221 INFO L93 Difference]: Finished difference Result 497 states and 616 transitions. [2022-01-31 18:16:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:16:11,222 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 59 states have internal predecessors, (184), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 190 [2022-01-31 18:16:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:11,223 INFO L225 Difference]: With dead ends: 497 [2022-01-31 18:16:11,223 INFO L226 Difference]: Without dead ends: 485 [2022-01-31 18:16:11,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5139, Invalid=8903, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 18:16:11,224 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1138 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:11,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 29 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-31 18:16:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 198. [2022-01-31 18:16:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2022-01-31 18:16:11,328 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 190 [2022-01-31 18:16:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:11,328 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2022-01-31 18:16:11,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 59 states have internal predecessors, (184), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2022-01-31 18:16:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 18:16:11,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:11,329 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:16:11,329 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1688376004, now seen corresponding path program 56 times [2022-01-31 18:16:11,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:11,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293500653] [2022-01-31 18:16:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:11,331 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:11,331 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:11,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:11,332 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:12,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:12,400 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 18:16:12,400 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293500653] [2022-01-31 18:16:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293500653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:12,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:12,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:16:12,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870902211] [2022-01-31 18:16:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:12,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:16:12,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:16:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:16:12,402 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand has 62 states, 62 states have (on average 3.0161290322580645) internal successors, (187), 60 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:18,019 INFO L93 Difference]: Finished difference Result 505 states and 626 transitions. [2022-01-31 18:16:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:16:18,019 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.0161290322580645) internal successors, (187), 60 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 193 [2022-01-31 18:16:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:18,021 INFO L225 Difference]: With dead ends: 505 [2022-01-31 18:16:18,021 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 18:16:18,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5316, Invalid=9204, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 18:16:18,022 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1051 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:18,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 35 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 18:16:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 201. [2022-01-31 18:16:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2022-01-31 18:16:18,128 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 193 [2022-01-31 18:16:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:18,129 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2022-01-31 18:16:18,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.0161290322580645) internal successors, (187), 60 states have internal predecessors, (187), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2022-01-31 18:16:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 18:16:18,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:18,130 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:18,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:16:18,130 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 645862248, now seen corresponding path program 57 times [2022-01-31 18:16:18,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:18,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141391722] [2022-01-31 18:16:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:18,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:18,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:18,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:18,133 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:19,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:19,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:16:19,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:19,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141391722] [2022-01-31 18:16:19,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [141391722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:19,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:19,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:16:19,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011010665] [2022-01-31 18:16:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:19,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:16:19,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:16:19,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:16:19,211 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 61 states have internal predecessors, (190), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:25,120 INFO L93 Difference]: Finished difference Result 513 states and 636 transitions. [2022-01-31 18:16:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:16:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 61 states have internal predecessors, (190), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 196 [2022-01-31 18:16:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:25,122 INFO L225 Difference]: With dead ends: 513 [2022-01-31 18:16:25,122 INFO L226 Difference]: Without dead ends: 501 [2022-01-31 18:16:25,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5496, Invalid=9510, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 18:16:25,123 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1191 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:25,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 35 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-31 18:16:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 204. [2022-01-31 18:16:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-01-31 18:16:25,260 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 196 [2022-01-31 18:16:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:25,260 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-01-31 18:16:25,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.015873015873016) internal successors, (190), 61 states have internal predecessors, (190), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-01-31 18:16:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 18:16:25,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:25,262 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:25,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:16:25,262 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:25,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash 27074628, now seen corresponding path program 58 times [2022-01-31 18:16:25,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:25,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781517319] [2022-01-31 18:16:25,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:25,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:25,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:25,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:25,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:26,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:26,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:26,398 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 18:16:26,398 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:26,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781517319] [2022-01-31 18:16:26,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781517319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:26,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:26,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:16:26,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33567052] [2022-01-31 18:16:26,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:26,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:16:26,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:26,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:16:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:16:26,400 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 64 states, 64 states have (on average 3.015625) internal successors, (193), 62 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:32,559 INFO L93 Difference]: Finished difference Result 521 states and 646 transitions. [2022-01-31 18:16:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:16:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.015625) internal successors, (193), 62 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 199 [2022-01-31 18:16:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:32,561 INFO L225 Difference]: With dead ends: 521 [2022-01-31 18:16:32,561 INFO L226 Difference]: Without dead ends: 509 [2022-01-31 18:16:32,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5679, Invalid=9821, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 18:16:32,562 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1293 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:32,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1295 Valid, 35 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-01-31 18:16:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 207. [2022-01-31 18:16:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 199 states have (on average 1.020100502512563) internal successors, (203), 199 states have internal predecessors, (203), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-01-31 18:16:32,675 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 199 [2022-01-31 18:16:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-01-31 18:16:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.015625) internal successors, (193), 62 states have internal predecessors, (193), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-01-31 18:16:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 18:16:32,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:32,676 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:32,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:16:32,676 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash -275278360, now seen corresponding path program 59 times [2022-01-31 18:16:32,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:32,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509954936] [2022-01-31 18:16:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:32,678 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:32,678 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:32,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:32,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:33,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:33,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:33,843 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 18:16:33,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:33,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509954936] [2022-01-31 18:16:33,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [509954936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:33,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:33,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:16:33,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188254510] [2022-01-31 18:16:33,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:33,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:16:33,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:33,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:16:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:16:33,849 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 63 states have internal predecessors, (196), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:40,307 INFO L93 Difference]: Finished difference Result 529 states and 656 transitions. [2022-01-31 18:16:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:16:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 63 states have internal predecessors, (196), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 202 [2022-01-31 18:16:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:40,309 INFO L225 Difference]: With dead ends: 529 [2022-01-31 18:16:40,309 INFO L226 Difference]: Without dead ends: 517 [2022-01-31 18:16:40,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5865, Invalid=10137, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 18:16:40,310 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1222 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:40,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 27 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-31 18:16:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 210. [2022-01-31 18:16:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 213 transitions. [2022-01-31 18:16:40,436 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 213 transitions. Word has length 202 [2022-01-31 18:16:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 213 transitions. [2022-01-31 18:16:40,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0153846153846153) internal successors, (196), 63 states have internal predecessors, (196), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 213 transitions. [2022-01-31 18:16:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 18:16:40,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:40,437 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:40,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:16:40,437 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1126724156, now seen corresponding path program 60 times [2022-01-31 18:16:40,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:40,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678744452] [2022-01-31 18:16:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:40,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:40,438 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:40,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:40,440 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:41,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:41,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:41,650 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 18:16:41,650 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:41,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678744452] [2022-01-31 18:16:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [678744452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:41,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:41,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:16:41,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116574111] [2022-01-31 18:16:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:41,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:16:41,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:16:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:16:41,652 INFO L87 Difference]: Start difference. First operand 210 states and 213 transitions. Second operand has 66 states, 66 states have (on average 3.015151515151515) internal successors, (199), 64 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:48,465 INFO L93 Difference]: Finished difference Result 537 states and 666 transitions. [2022-01-31 18:16:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:16:48,466 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.015151515151515) internal successors, (199), 64 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 205 [2022-01-31 18:16:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:48,467 INFO L225 Difference]: With dead ends: 537 [2022-01-31 18:16:48,467 INFO L226 Difference]: Without dead ends: 525 [2022-01-31 18:16:48,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6054, Invalid=10458, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 18:16:48,468 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1427 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:48,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 29 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:16:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-31 18:16:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 213. [2022-01-31 18:16:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 205 states have (on average 1.0195121951219512) internal successors, (209), 205 states have internal predecessors, (209), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2022-01-31 18:16:48,595 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 205 [2022-01-31 18:16:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:48,595 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2022-01-31 18:16:48,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.015151515151515) internal successors, (199), 64 states have internal predecessors, (199), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2022-01-31 18:16:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 18:16:48,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:48,596 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:48,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:16:48,596 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash -471582616, now seen corresponding path program 61 times [2022-01-31 18:16:48,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749316211] [2022-01-31 18:16:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:48,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:48,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:48,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:48,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:49,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:49,826 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 18:16:49,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:49,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749316211] [2022-01-31 18:16:49,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1749316211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:49,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:49,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:16:49,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525900919] [2022-01-31 18:16:49,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:49,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:16:49,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:16:49,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:16:49,828 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 67 states, 67 states have (on average 3.014925373134328) internal successors, (202), 65 states have internal predecessors, (202), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:16:56,914 INFO L93 Difference]: Finished difference Result 545 states and 676 transitions. [2022-01-31 18:16:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:16:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.014925373134328) internal successors, (202), 65 states have internal predecessors, (202), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 208 [2022-01-31 18:16:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:16:56,916 INFO L225 Difference]: With dead ends: 545 [2022-01-31 18:16:56,916 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 18:16:56,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6246, Invalid=10784, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 18:16:56,917 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1287 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 805 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 805 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:16:56,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1289 Valid, 27 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [805 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:16:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 18:16:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 216. [2022-01-31 18:16:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 208 states have internal predecessors, (212), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:16:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-01-31 18:16:57,061 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 208 [2022-01-31 18:16:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:16:57,062 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-01-31 18:16:57,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.014925373134328) internal successors, (202), 65 states have internal predecessors, (202), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:16:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-01-31 18:16:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 18:16:57,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:16:57,063 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:16:57,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:16:57,063 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:16:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:16:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash 518642500, now seen corresponding path program 62 times [2022-01-31 18:16:57,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:16:57,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975573547] [2022-01-31 18:16:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:16:57,066 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:16:57,066 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:16:57,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:16:57,067 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:16:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:58,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:16:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:58,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:16:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:16:58,359 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 18:16:58,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:16:58,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975573547] [2022-01-31 18:16:58,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [975573547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:16:58,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:16:58,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:16:58,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900020631] [2022-01-31 18:16:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:16:58,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:16:58,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:16:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:16:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:16:58,361 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 68 states, 68 states have (on average 3.014705882352941) internal successors, (205), 66 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:05,894 INFO L93 Difference]: Finished difference Result 553 states and 686 transitions. [2022-01-31 18:17:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:17:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.014705882352941) internal successors, (205), 66 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 211 [2022-01-31 18:17:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:05,896 INFO L225 Difference]: With dead ends: 553 [2022-01-31 18:17:05,896 INFO L226 Difference]: Without dead ends: 541 [2022-01-31 18:17:05,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6441, Invalid=11115, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 18:17:05,897 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1160 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:05,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1162 Valid, 33 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:17:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-31 18:17:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 219. [2022-01-31 18:17:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:17:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-01-31 18:17:06,038 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 211 [2022-01-31 18:17:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:06,038 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-01-31 18:17:06,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.014705882352941) internal successors, (205), 66 states have internal predecessors, (205), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-01-31 18:17:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 18:17:06,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:06,039 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:06,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:17:06,039 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1815282968, now seen corresponding path program 63 times [2022-01-31 18:17:06,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:06,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524393317] [2022-01-31 18:17:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:06,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:06,043 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:06,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:06,044 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:07,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:07,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:17:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:07,368 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 18:17:07,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:07,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524393317] [2022-01-31 18:17:07,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524393317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:07,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:07,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:17:07,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902222161] [2022-01-31 18:17:07,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:07,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:17:07,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:07,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:17:07,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:17:07,377 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 67 states have internal predecessors, (208), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:15,195 INFO L93 Difference]: Finished difference Result 561 states and 696 transitions. [2022-01-31 18:17:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:17:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 67 states have internal predecessors, (208), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 214 [2022-01-31 18:17:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:15,197 INFO L225 Difference]: With dead ends: 561 [2022-01-31 18:17:15,197 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 18:17:15,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6639, Invalid=11451, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 18:17:15,199 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1261 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:15,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 29 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:17:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 18:17:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 222. [2022-01-31 18:17:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:17:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2022-01-31 18:17:15,337 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 214 [2022-01-31 18:17:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:15,337 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2022-01-31 18:17:15,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.0144927536231885) internal successors, (208), 67 states have internal predecessors, (208), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2022-01-31 18:17:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 18:17:15,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:15,338 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:15,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:17:15,338 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash -563345212, now seen corresponding path program 64 times [2022-01-31 18:17:15,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:15,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988648789] [2022-01-31 18:17:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:15,339 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:15,339 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:15,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:15,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:16,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:16,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:17:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:16,716 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 18:17:16,716 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:16,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988648789] [2022-01-31 18:17:16,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988648789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:16,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:16,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:17:16,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642071672] [2022-01-31 18:17:16,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:16,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 18:17:16,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 18:17:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:17:16,727 INFO L87 Difference]: Start difference. First operand 222 states and 225 transitions. Second operand has 70 states, 70 states have (on average 3.0142857142857142) internal successors, (211), 68 states have internal predecessors, (211), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:25,046 INFO L93 Difference]: Finished difference Result 569 states and 706 transitions. [2022-01-31 18:17:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 18:17:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.0142857142857142) internal successors, (211), 68 states have internal predecessors, (211), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 217 [2022-01-31 18:17:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:25,048 INFO L225 Difference]: With dead ends: 569 [2022-01-31 18:17:25,048 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 18:17:25,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2341 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6840, Invalid=11792, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 18:17:25,049 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1250 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:25,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 35 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 18:17:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 225. [2022-01-31 18:17:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 217 states have (on average 1.0184331797235022) internal successors, (221), 217 states have internal predecessors, (221), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:17:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-01-31 18:17:25,192 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 217 [2022-01-31 18:17:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:25,192 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-01-31 18:17:25,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.0142857142857142) internal successors, (211), 68 states have internal predecessors, (211), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-01-31 18:17:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 18:17:25,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:25,193 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:25,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:17:25,193 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1581654680, now seen corresponding path program 65 times [2022-01-31 18:17:25,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940153244] [2022-01-31 18:17:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:25,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:25,195 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:25,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:25,196 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:26,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:26,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:17:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:26,582 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 18:17:26,582 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940153244] [2022-01-31 18:17:26,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1940153244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:26,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:26,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:17:26,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095266404] [2022-01-31 18:17:26,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:26,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:17:26,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:17:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:17:26,584 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 71 states, 71 states have (on average 3.0140845070422535) internal successors, (214), 69 states have internal predecessors, (214), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:35,297 INFO L93 Difference]: Finished difference Result 577 states and 716 transitions. [2022-01-31 18:17:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:17:35,297 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.0140845070422535) internal successors, (214), 69 states have internal predecessors, (214), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 220 [2022-01-31 18:17:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:35,299 INFO L225 Difference]: With dead ends: 577 [2022-01-31 18:17:35,299 INFO L226 Difference]: Without dead ends: 565 [2022-01-31 18:17:35,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7044, Invalid=12138, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 18:17:35,300 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1418 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:35,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1420 Valid, 29 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-31 18:17:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 228. [2022-01-31 18:17:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:17:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2022-01-31 18:17:35,461 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 220 [2022-01-31 18:17:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:35,461 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2022-01-31 18:17:35,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.0140845070422535) internal successors, (214), 69 states have internal predecessors, (214), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2022-01-31 18:17:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 18:17:35,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:35,462 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:35,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:17:35,462 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1609963076, now seen corresponding path program 66 times [2022-01-31 18:17:35,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:35,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714565225] [2022-01-31 18:17:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:35,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:35,465 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:35,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:35,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:36,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:36,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:17:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:36,906 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 18:17:36,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:36,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714565225] [2022-01-31 18:17:36,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1714565225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:36,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:36,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:17:36,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975606552] [2022-01-31 18:17:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:36,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:17:36,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:17:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:17:36,908 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand has 72 states, 72 states have (on average 3.013888888888889) internal successors, (217), 70 states have internal predecessors, (217), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:45,957 INFO L93 Difference]: Finished difference Result 585 states and 726 transitions. [2022-01-31 18:17:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:17:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.013888888888889) internal successors, (217), 70 states have internal predecessors, (217), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 223 [2022-01-31 18:17:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:45,959 INFO L225 Difference]: With dead ends: 585 [2022-01-31 18:17:45,959 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 18:17:45,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7251, Invalid=12489, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 18:17:45,961 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1308 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:45,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1310 Valid, 31 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:17:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 18:17:46,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 231. [2022-01-31 18:17:46,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 223 states have internal predecessors, (227), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:17:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2022-01-31 18:17:46,111 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 223 [2022-01-31 18:17:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:46,112 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2022-01-31 18:17:46,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.013888888888889) internal successors, (217), 70 states have internal predecessors, (217), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2022-01-31 18:17:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 18:17:46,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:46,113 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:46,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:17:46,113 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1108533224, now seen corresponding path program 67 times [2022-01-31 18:17:46,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:46,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353274292] [2022-01-31 18:17:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:46,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:46,115 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:46,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:46,117 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:47,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:47,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:17:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:47,600 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 18:17:47,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:47,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353274292] [2022-01-31 18:17:47,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [353274292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:47,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:47,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:17:47,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102938164] [2022-01-31 18:17:47,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:47,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:17:47,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:17:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:17:47,602 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 73 states, 73 states have (on average 3.0136986301369864) internal successors, (220), 71 states have internal predecessors, (220), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:17:57,224 INFO L93 Difference]: Finished difference Result 593 states and 736 transitions. [2022-01-31 18:17:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:17:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.0136986301369864) internal successors, (220), 71 states have internal predecessors, (220), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 226 [2022-01-31 18:17:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:17:57,226 INFO L225 Difference]: With dead ends: 593 [2022-01-31 18:17:57,226 INFO L226 Difference]: Without dead ends: 581 [2022-01-31 18:17:57,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2551 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7461, Invalid=12845, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 18:17:57,227 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1442 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:17:57,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1444 Valid, 31 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:17:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-31 18:17:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 234. [2022-01-31 18:17:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:17:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 237 transitions. [2022-01-31 18:17:57,387 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 237 transitions. Word has length 226 [2022-01-31 18:17:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:17:57,387 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 237 transitions. [2022-01-31 18:17:57,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.0136986301369864) internal successors, (220), 71 states have internal predecessors, (220), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:17:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 237 transitions. [2022-01-31 18:17:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 18:17:57,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:17:57,388 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:17:57,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:17:57,388 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:17:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:17:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash 908067780, now seen corresponding path program 68 times [2022-01-31 18:17:57,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:17:57,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248608327] [2022-01-31 18:17:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:17:57,391 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:17:57,391 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:17:57,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:17:57,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:17:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:58,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:17:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:58,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:17:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:17:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:17:58,918 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:17:58,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248608327] [2022-01-31 18:17:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248608327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:17:58,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:17:58,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:17:58,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011104436] [2022-01-31 18:17:58,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:17:58,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:17:58,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:17:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:17:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:17:58,920 INFO L87 Difference]: Start difference. First operand 234 states and 237 transitions. Second operand has 74 states, 74 states have (on average 3.0135135135135136) internal successors, (223), 72 states have internal predecessors, (223), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:08,804 INFO L93 Difference]: Finished difference Result 601 states and 746 transitions. [2022-01-31 18:18:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:18:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.0135135135135136) internal successors, (223), 72 states have internal predecessors, (223), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 229 [2022-01-31 18:18:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:08,806 INFO L225 Difference]: With dead ends: 601 [2022-01-31 18:18:08,806 INFO L226 Difference]: Without dead ends: 589 [2022-01-31 18:18:08,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2623 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7674, Invalid=13206, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 18:18:08,807 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1337 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:08,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 33 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-31 18:18:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 237. [2022-01-31 18:18:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 229 states have (on average 1.017467248908297) internal successors, (233), 229 states have internal predecessors, (233), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:18:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2022-01-31 18:18:08,969 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 229 [2022-01-31 18:18:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:08,970 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2022-01-31 18:18:08,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.0135135135135136) internal successors, (223), 72 states have internal predecessors, (223), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2022-01-31 18:18:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 18:18:08,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:08,970 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:08,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:18:08,971 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1153432984, now seen corresponding path program 69 times [2022-01-31 18:18:08,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:08,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007248473] [2022-01-31 18:18:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:08,972 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:08,972 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:08,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:08,974 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:10,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:10,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:18:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:10,516 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 18:18:10,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007248473] [2022-01-31 18:18:10,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007248473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:10,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:10,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:18:10,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926950454] [2022-01-31 18:18:10,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:10,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:18:10,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:18:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2632, Invalid=2918, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:18:10,518 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand has 75 states, 75 states have (on average 3.013333333333333) internal successors, (226), 73 states have internal predecessors, (226), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:20,772 INFO L93 Difference]: Finished difference Result 609 states and 756 transitions. [2022-01-31 18:18:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:18:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.013333333333333) internal successors, (226), 73 states have internal predecessors, (226), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 232 [2022-01-31 18:18:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:20,774 INFO L225 Difference]: With dead ends: 609 [2022-01-31 18:18:20,774 INFO L226 Difference]: Without dead ends: 597 [2022-01-31 18:18:20,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2696 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7890, Invalid=13572, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 18:18:20,776 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1503 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:20,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 33 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-31 18:18:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 240. [2022-01-31 18:18:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 232 states have (on average 1.0172413793103448) internal successors, (236), 232 states have internal predecessors, (236), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:18:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-01-31 18:18:20,943 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 232 [2022-01-31 18:18:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:20,943 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-01-31 18:18:20,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.013333333333333) internal successors, (226), 73 states have internal predecessors, (226), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-01-31 18:18:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 18:18:20,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:20,944 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:20,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:18:20,944 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1585327804, now seen corresponding path program 70 times [2022-01-31 18:18:20,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:20,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984148380] [2022-01-31 18:18:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:20,947 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:20,947 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:20,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:20,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:22,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:18:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:18:22,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:22,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984148380] [2022-01-31 18:18:22,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [984148380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:22,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:22,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:18:22,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75436069] [2022-01-31 18:18:22,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:22,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:18:22,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:18:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=2995, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:18:22,502 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 76 states, 76 states have (on average 3.013157894736842) internal successors, (229), 74 states have internal predecessors, (229), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:33,039 INFO L93 Difference]: Finished difference Result 617 states and 766 transitions. [2022-01-31 18:18:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:18:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.013157894736842) internal successors, (229), 74 states have internal predecessors, (229), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 235 [2022-01-31 18:18:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:33,041 INFO L225 Difference]: With dead ends: 617 [2022-01-31 18:18:33,041 INFO L226 Difference]: Without dead ends: 605 [2022-01-31 18:18:33,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8109, Invalid=13943, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 18:18:33,042 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1403 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:33,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1405 Valid, 39 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-01-31 18:18:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 243. [2022-01-31 18:18:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:18:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2022-01-31 18:18:33,216 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 235 [2022-01-31 18:18:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:33,216 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2022-01-31 18:18:33,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.013157894736842) internal successors, (229), 74 states have internal predecessors, (229), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2022-01-31 18:18:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-01-31 18:18:33,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:33,217 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:33,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:18:33,217 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash -441891608, now seen corresponding path program 71 times [2022-01-31 18:18:33,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:33,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796469276] [2022-01-31 18:18:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:33,219 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:33,219 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:33,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:33,220 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:34,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:18:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:34,831 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 18:18:34,831 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:34,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796469276] [2022-01-31 18:18:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1796469276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:34,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:34,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:18:34,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937331957] [2022-01-31 18:18:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:34,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:18:34,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:18:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2779, Invalid=3073, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:18:34,833 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 77 states, 77 states have (on average 3.012987012987013) internal successors, (232), 75 states have internal predecessors, (232), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:45,683 INFO L93 Difference]: Finished difference Result 625 states and 776 transitions. [2022-01-31 18:18:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:18:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.012987012987013) internal successors, (232), 75 states have internal predecessors, (232), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 238 [2022-01-31 18:18:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:45,685 INFO L225 Difference]: With dead ends: 625 [2022-01-31 18:18:45,685 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 18:18:45,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8331, Invalid=14319, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 18:18:45,686 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1467 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 921 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 921 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:45,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 33 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [921 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:18:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 18:18:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 246. [2022-01-31 18:18:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:18:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 249 transitions. [2022-01-31 18:18:45,865 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 249 transitions. Word has length 238 [2022-01-31 18:18:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:45,865 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 249 transitions. [2022-01-31 18:18:45,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.012987012987013) internal successors, (232), 75 states have internal predecessors, (232), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 249 transitions. [2022-01-31 18:18:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 18:18:45,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:45,866 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:45,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:18:45,866 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:45,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:45,866 INFO L85 PathProgramCache]: Analyzing trace with hash 280198852, now seen corresponding path program 72 times [2022-01-31 18:18:45,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:45,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694522096] [2022-01-31 18:18:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:45,867 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:45,867 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:45,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:45,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:47,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:18:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:47,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:18:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:18:47,503 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 18:18:47,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:18:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694522096] [2022-01-31 18:18:47,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [694522096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:18:47,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:18:47,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:18:47,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752619901] [2022-01-31 18:18:47,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:18:47,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:18:47,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:18:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:18:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=3152, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:18:47,505 INFO L87 Difference]: Start difference. First operand 246 states and 249 transitions. Second operand has 78 states, 78 states have (on average 3.0128205128205128) internal successors, (235), 76 states have internal predecessors, (235), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:18:58,910 INFO L93 Difference]: Finished difference Result 633 states and 786 transitions. [2022-01-31 18:18:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:18:58,910 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.0128205128205128) internal successors, (235), 76 states have internal predecessors, (235), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 241 [2022-01-31 18:18:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:18:58,912 INFO L225 Difference]: With dead ends: 633 [2022-01-31 18:18:58,912 INFO L226 Difference]: Without dead ends: 621 [2022-01-31 18:18:58,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2921 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8556, Invalid=14700, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 18:18:58,913 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1526 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 959 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:18:58,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 25 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [959 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:18:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-31 18:18:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 249. [2022-01-31 18:18:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 241 states have (on average 1.016597510373444) internal successors, (245), 241 states have internal predecessors, (245), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:18:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 252 transitions. [2022-01-31 18:18:59,098 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 252 transitions. Word has length 241 [2022-01-31 18:18:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:18:59,098 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 252 transitions. [2022-01-31 18:18:59,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.0128205128205128) internal successors, (235), 76 states have internal predecessors, (235), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:18:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 252 transitions. [2022-01-31 18:18:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 18:18:59,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:18:59,099 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:18:59,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:18:59,099 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:18:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:18:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1414092952, now seen corresponding path program 73 times [2022-01-31 18:18:59,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:18:59,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507112258] [2022-01-31 18:18:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:18:59,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:18:59,103 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:18:59,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:18:59,105 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:18:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:00,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:00,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:19:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:00,812 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 18:19:00,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:00,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507112258] [2022-01-31 18:19:00,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507112258] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:00,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:00,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:19:00,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933723906] [2022-01-31 18:19:00,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:00,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:19:00,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:19:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2930, Invalid=3232, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:19:00,814 INFO L87 Difference]: Start difference. First operand 249 states and 252 transitions. Second operand has 79 states, 79 states have (on average 3.0126582278481013) internal successors, (238), 77 states have internal predecessors, (238), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:12,818 INFO L93 Difference]: Finished difference Result 641 states and 796 transitions. [2022-01-31 18:19:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:19:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.0126582278481013) internal successors, (238), 77 states have internal predecessors, (238), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 244 [2022-01-31 18:19:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:12,821 INFO L225 Difference]: With dead ends: 641 [2022-01-31 18:19:12,821 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 18:19:12,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8784, Invalid=15086, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 18:19:12,822 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1488 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:12,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 29 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:19:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 18:19:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 252. [2022-01-31 18:19:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 244 states have (on average 1.0163934426229508) internal successors, (248), 244 states have internal predecessors, (248), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:19:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 255 transitions. [2022-01-31 18:19:13,013 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 255 transitions. Word has length 244 [2022-01-31 18:19:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:13,013 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 255 transitions. [2022-01-31 18:19:13,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.0126582278481013) internal successors, (238), 77 states have internal predecessors, (238), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 255 transitions. [2022-01-31 18:19:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 18:19:13,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:13,014 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:13,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:19:13,014 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:13,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1605563324, now seen corresponding path program 74 times [2022-01-31 18:19:13,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884380623] [2022-01-31 18:19:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:13,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:13,016 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:13,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:13,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:14,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:14,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:19:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:14,772 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 18:19:14,772 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:14,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884380623] [2022-01-31 18:19:14,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1884380623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:14,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:14,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:19:14,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662646867] [2022-01-31 18:19:14,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:14,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:19:14,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:14,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:19:14,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=3313, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:19:14,774 INFO L87 Difference]: Start difference. First operand 252 states and 255 transitions. Second operand has 80 states, 80 states have (on average 3.0125) internal successors, (241), 78 states have internal predecessors, (241), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:27,230 INFO L93 Difference]: Finished difference Result 649 states and 806 transitions. [2022-01-31 18:19:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:19:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.0125) internal successors, (241), 78 states have internal predecessors, (241), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 247 [2022-01-31 18:19:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:27,232 INFO L225 Difference]: With dead ends: 649 [2022-01-31 18:19:27,232 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 18:19:27,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3076 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9015, Invalid=15477, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 18:19:27,233 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1777 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 1111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1779 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1111 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:27,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1779 Valid, 27 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1111 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:19:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 18:19:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 255. [2022-01-31 18:19:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 247 states have internal predecessors, (251), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:19:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-01-31 18:19:27,429 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 247 [2022-01-31 18:19:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:27,429 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-01-31 18:19:27,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.0125) internal successors, (241), 78 states have internal predecessors, (241), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-01-31 18:19:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 18:19:27,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:27,430 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:27,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:19:27,430 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1982846488, now seen corresponding path program 75 times [2022-01-31 18:19:27,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:27,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507090066] [2022-01-31 18:19:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:27,432 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:27,432 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:27,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:27,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:29,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:29,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:19:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:29,211 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 18:19:29,211 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507090066] [2022-01-31 18:19:29,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507090066] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:29,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:29,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:19:29,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468582311] [2022-01-31 18:19:29,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:29,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:19:29,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:19:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3085, Invalid=3395, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:19:29,213 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 81 states, 81 states have (on average 3.0123456790123457) internal successors, (244), 79 states have internal predecessors, (244), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:42,234 INFO L93 Difference]: Finished difference Result 657 states and 816 transitions. [2022-01-31 18:19:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:19:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.0123456790123457) internal successors, (244), 79 states have internal predecessors, (244), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 250 [2022-01-31 18:19:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:42,236 INFO L225 Difference]: With dead ends: 657 [2022-01-31 18:19:42,236 INFO L226 Difference]: Without dead ends: 645 [2022-01-31 18:19:42,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3155 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9249, Invalid=15873, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 18:19:42,238 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1812 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 1146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1146 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:42,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1814 Valid, 23 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1146 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:19:42,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-31 18:19:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 258. [2022-01-31 18:19:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:19:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 261 transitions. [2022-01-31 18:19:42,443 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 261 transitions. Word has length 250 [2022-01-31 18:19:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:42,443 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 261 transitions. [2022-01-31 18:19:42,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.0123456790123457) internal successors, (244), 79 states have internal predecessors, (244), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 261 transitions. [2022-01-31 18:19:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 18:19:42,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:42,444 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:42,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:19:42,444 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1696171580, now seen corresponding path program 76 times [2022-01-31 18:19:42,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429562685] [2022-01-31 18:19:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:42,447 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:42,447 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:42,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:42,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:44,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:19:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:44,318 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 18:19:44,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:44,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429562685] [2022-01-31 18:19:44,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [429562685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:44,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:44,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:19:44,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905983724] [2022-01-31 18:19:44,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:44,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:19:44,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:44,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:19:44,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3164, Invalid=3478, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:19:44,321 INFO L87 Difference]: Start difference. First operand 258 states and 261 transitions. Second operand has 82 states, 82 states have (on average 3.0121951219512195) internal successors, (247), 80 states have internal predecessors, (247), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:19:57,745 INFO L93 Difference]: Finished difference Result 665 states and 826 transitions. [2022-01-31 18:19:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:19:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.0121951219512195) internal successors, (247), 80 states have internal predecessors, (247), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 253 [2022-01-31 18:19:57,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:19:57,747 INFO L225 Difference]: With dead ends: 665 [2022-01-31 18:19:57,747 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 18:19:57,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9486, Invalid=16274, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 18:19:57,748 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1380 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:19:57,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1382 Valid, 33 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:19:57,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 18:19:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 261. [2022-01-31 18:19:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 253 states have (on average 1.0158102766798418) internal successors, (257), 253 states have internal predecessors, (257), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:19:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2022-01-31 18:19:57,952 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 253 [2022-01-31 18:19:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:19:57,952 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2022-01-31 18:19:57,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.0121951219512195) internal successors, (247), 80 states have internal predecessors, (247), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:19:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2022-01-31 18:19:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-01-31 18:19:57,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:19:57,953 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:19:57,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:19:57,953 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:19:57,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:19:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash 241028200, now seen corresponding path program 77 times [2022-01-31 18:19:57,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:19:57,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434480337] [2022-01-31 18:19:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:19:57,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:19:57,955 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:19:57,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:19:57,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:19:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:59,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:19:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:59,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:19:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:19:59,825 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 18:19:59,825 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:19:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434480337] [2022-01-31 18:19:59,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1434480337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:19:59,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:19:59,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:19:59,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630443450] [2022-01-31 18:19:59,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:19:59,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:19:59,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:19:59,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:19:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:19:59,827 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand has 83 states, 83 states have (on average 3.0120481927710845) internal successors, (250), 81 states have internal predecessors, (250), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:20:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:13,695 INFO L93 Difference]: Finished difference Result 673 states and 836 transitions. [2022-01-31 18:20:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:20:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.0120481927710845) internal successors, (250), 81 states have internal predecessors, (250), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 256 [2022-01-31 18:20:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:13,697 INFO L225 Difference]: With dead ends: 673 [2022-01-31 18:20:13,697 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 18:20:13,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9726, Invalid=16680, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 18:20:13,698 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1528 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:13,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 35 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:20:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 18:20:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 264. [2022-01-31 18:20:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 256 states have (on average 1.015625) internal successors, (260), 256 states have internal predecessors, (260), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:20:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 267 transitions. [2022-01-31 18:20:13,908 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 267 transitions. Word has length 256 [2022-01-31 18:20:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:13,909 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 267 transitions. [2022-01-31 18:20:13,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.0120481927710845) internal successors, (250), 81 states have internal predecessors, (250), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:20:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 267 transitions. [2022-01-31 18:20:13,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 18:20:13,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:13,910 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:13,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:20:13,910 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:13,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash -115882172, now seen corresponding path program 78 times [2022-01-31 18:20:13,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:13,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265712750] [2022-01-31 18:20:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:13,911 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:13,911 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:13,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:13,912 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:15,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:15,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:20:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:15,807 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 18:20:15,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:15,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265712750] [2022-01-31 18:20:15,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [265712750] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:15,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:15,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:20:15,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574299458] [2022-01-31 18:20:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:15,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:20:15,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:20:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=3647, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:20:15,809 INFO L87 Difference]: Start difference. First operand 264 states and 267 transitions. Second operand has 84 states, 84 states have (on average 3.011904761904762) internal successors, (253), 82 states have internal predecessors, (253), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:20:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:30,248 INFO L93 Difference]: Finished difference Result 681 states and 846 transitions. [2022-01-31 18:20:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:20:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.011904761904762) internal successors, (253), 82 states have internal predecessors, (253), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 259 [2022-01-31 18:20:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:30,250 INFO L225 Difference]: With dead ends: 681 [2022-01-31 18:20:30,250 INFO L226 Difference]: Without dead ends: 669 [2022-01-31 18:20:30,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3398 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9969, Invalid=17091, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 18:20:30,251 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1583 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:30,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 31 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [989 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:20:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-31 18:20:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 267. [2022-01-31 18:20:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 259 states have (on average 1.0154440154440154) internal successors, (263), 259 states have internal predecessors, (263), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:20:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2022-01-31 18:20:30,467 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 259 [2022-01-31 18:20:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:30,468 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2022-01-31 18:20:30,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.011904761904762) internal successors, (253), 82 states have internal predecessors, (253), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:20:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2022-01-31 18:20:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-31 18:20:30,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:30,469 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:30,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:20:30,469 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:30,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1506250472, now seen corresponding path program 79 times [2022-01-31 18:20:30,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:30,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456265348] [2022-01-31 18:20:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:30,470 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:30,470 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:30,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:30,472 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:32,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:20:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:32,407 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 18:20:32,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:32,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456265348] [2022-01-31 18:20:32,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456265348] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:32,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:32,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:20:32,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586941514] [2022-01-31 18:20:32,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:32,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:20:32,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:32,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:20:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3407, Invalid=3733, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:20:32,410 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand has 85 states, 85 states have (on average 3.011764705882353) internal successors, (256), 83 states have internal predecessors, (256), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:20:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:47,433 INFO L93 Difference]: Finished difference Result 689 states and 856 transitions. [2022-01-31 18:20:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:20:47,434 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.011764705882353) internal successors, (256), 83 states have internal predecessors, (256), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 262 [2022-01-31 18:20:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:47,435 INFO L225 Difference]: With dead ends: 689 [2022-01-31 18:20:47,435 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 18:20:47,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10215, Invalid=17507, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 18:20:47,437 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1654 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 1031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1656 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:47,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1656 Valid, 37 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1031 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:20:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 18:20:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 270. [2022-01-31 18:20:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:20:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2022-01-31 18:20:47,666 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 262 [2022-01-31 18:20:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:47,667 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2022-01-31 18:20:47,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.011764705882353) internal successors, (256), 83 states have internal predecessors, (256), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:20:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2022-01-31 18:20:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 18:20:47,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:47,667 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:47,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:20:47,668 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash -512166716, now seen corresponding path program 80 times [2022-01-31 18:20:47,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:47,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145049964] [2022-01-31 18:20:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:47,669 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:47,669 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:47,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:47,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:49,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:20:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:49,671 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 18:20:49,671 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145049964] [2022-01-31 18:20:49,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2145049964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:49,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:49,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:20:49,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151026374] [2022-01-31 18:20:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:49,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:20:49,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:20:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3490, Invalid=3820, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:20:49,675 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 86 states, 86 states have (on average 3.011627906976744) internal successors, (259), 84 states have internal predecessors, (259), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:21:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:05,345 INFO L93 Difference]: Finished difference Result 697 states and 866 transitions. [2022-01-31 18:21:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:21:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.011627906976744) internal successors, (259), 84 states have internal predecessors, (259), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 265 [2022-01-31 18:21:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:05,347 INFO L225 Difference]: With dead ends: 697 [2022-01-31 18:21:05,347 INFO L226 Difference]: Without dead ends: 685 [2022-01-31 18:21:05,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10464, Invalid=17928, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 18:21:05,348 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1681 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:05,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1683 Valid, 35 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:21:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-31 18:21:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 273. [2022-01-31 18:21:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 265 states have (on average 1.0150943396226415) internal successors, (269), 265 states have internal predecessors, (269), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:21:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 276 transitions. [2022-01-31 18:21:05,580 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 276 transitions. Word has length 265 [2022-01-31 18:21:05,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:05,580 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 276 transitions. [2022-01-31 18:21:05,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.011627906976744) internal successors, (259), 84 states have internal predecessors, (259), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:21:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 276 transitions. [2022-01-31 18:21:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-01-31 18:21:05,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:05,581 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:05,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:21:05,581 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1636470424, now seen corresponding path program 81 times [2022-01-31 18:21:05,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:05,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331608541] [2022-01-31 18:21:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:05,583 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:05,583 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:05,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:05,584 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:07,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:07,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:21:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:07,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:07,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331608541] [2022-01-31 18:21:07,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [331608541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:07,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:07,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:21:07,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667833419] [2022-01-31 18:21:07,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:07,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:21:07,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:07,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:21:07,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3574, Invalid=3908, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:21:07,631 INFO L87 Difference]: Start difference. First operand 273 states and 276 transitions. Second operand has 87 states, 87 states have (on average 3.0114942528735633) internal successors, (262), 85 states have internal predecessors, (262), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:21:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:24,224 INFO L93 Difference]: Finished difference Result 705 states and 876 transitions. [2022-01-31 18:21:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:21:24,224 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0114942528735633) internal successors, (262), 85 states have internal predecessors, (262), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 268 [2022-01-31 18:21:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:24,226 INFO L225 Difference]: With dead ends: 705 [2022-01-31 18:21:24,226 INFO L226 Difference]: Without dead ends: 693 [2022-01-31 18:21:24,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10716, Invalid=18354, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 18:21:24,227 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1629 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 1017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:24,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 29 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1017 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:21:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-31 18:21:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 276. [2022-01-31 18:21:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 268 states have (on average 1.0149253731343284) internal successors, (272), 268 states have internal predecessors, (272), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:21:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-01-31 18:21:24,472 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 268 [2022-01-31 18:21:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:24,472 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-01-31 18:21:24,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0114942528735633) internal successors, (262), 85 states have internal predecessors, (262), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:21:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-01-31 18:21:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 18:21:24,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:24,473 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:24,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:21:24,473 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash 681706052, now seen corresponding path program 82 times [2022-01-31 18:21:24,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:24,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696672247] [2022-01-31 18:21:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:24,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:24,476 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:24,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:24,477 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:26,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:26,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:21:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:26,630 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 18:21:26,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696672247] [2022-01-31 18:21:26,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1696672247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:26,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:26,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:21:26,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713311210] [2022-01-31 18:21:26,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:26,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:21:26,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:21:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3659, Invalid=3997, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:21:26,633 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 88 states, 88 states have (on average 3.0113636363636362) internal successors, (265), 86 states have internal predecessors, (265), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:21:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:44,073 INFO L93 Difference]: Finished difference Result 713 states and 886 transitions. [2022-01-31 18:21:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:21:44,073 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.0113636363636362) internal successors, (265), 86 states have internal predecessors, (265), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 271 [2022-01-31 18:21:44,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:44,075 INFO L225 Difference]: With dead ends: 713 [2022-01-31 18:21:44,075 INFO L226 Difference]: Without dead ends: 701 [2022-01-31 18:21:44,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10971, Invalid=18785, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 18:21:44,076 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1744 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1746 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:44,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1746 Valid, 29 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:21:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-31 18:21:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 279. [2022-01-31 18:21:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:21:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 282 transitions. [2022-01-31 18:21:44,326 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 282 transitions. Word has length 271 [2022-01-31 18:21:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:44,327 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 282 transitions. [2022-01-31 18:21:44,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.0113636363636362) internal successors, (265), 86 states have internal predecessors, (265), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:21:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 282 transitions. [2022-01-31 18:21:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-31 18:21:44,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:44,328 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:44,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:21:44,328 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1597017112, now seen corresponding path program 83 times [2022-01-31 18:21:44,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:44,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042263409] [2022-01-31 18:21:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:44,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:44,329 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:44,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:44,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:46,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:46,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:21:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:46,474 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042263409] [2022-01-31 18:21:46,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042263409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:46,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:46,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:21:46,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985297505] [2022-01-31 18:21:46,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:46,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:21:46,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:21:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3745, Invalid=4087, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:21:46,476 INFO L87 Difference]: Start difference. First operand 279 states and 282 transitions. Second operand has 89 states, 89 states have (on average 3.0112359550561796) internal successors, (268), 87 states have internal predecessors, (268), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:22:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:04,503 INFO L93 Difference]: Finished difference Result 721 states and 896 transitions. [2022-01-31 18:22:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:22:04,503 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.0112359550561796) internal successors, (268), 87 states have internal predecessors, (268), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 274 [2022-01-31 18:22:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:04,504 INFO L225 Difference]: With dead ends: 721 [2022-01-31 18:22:04,504 INFO L226 Difference]: Without dead ends: 709 [2022-01-31 18:22:04,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3823 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11229, Invalid=19221, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 18:22:04,506 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1770 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 1109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1109 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:04,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 29 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1109 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:22:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-31 18:22:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 282. [2022-01-31 18:22:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:22:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 285 transitions. [2022-01-31 18:22:04,758 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 285 transitions. Word has length 274 [2022-01-31 18:22:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:04,758 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 285 transitions. [2022-01-31 18:22:04,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.0112359550561796) internal successors, (268), 87 states have internal predecessors, (268), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:22:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 285 transitions. [2022-01-31 18:22:04,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 18:22:04,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:04,759 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:04,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:22:04,759 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:04,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:04,759 INFO L85 PathProgramCache]: Analyzing trace with hash -785715260, now seen corresponding path program 84 times [2022-01-31 18:22:04,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:04,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136914423] [2022-01-31 18:22:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:04,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:04,761 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:04,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:04,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:06,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:06,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:22:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:06,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136914423] [2022-01-31 18:22:06,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2136914423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:06,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:06,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:22:06,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206318094] [2022-01-31 18:22:06,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:06,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:22:06,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:06,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:22:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3832, Invalid=4178, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:22:06,963 INFO L87 Difference]: Start difference. First operand 282 states and 285 transitions. Second operand has 90 states, 90 states have (on average 3.011111111111111) internal successors, (271), 88 states have internal predecessors, (271), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:22:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:24,989 INFO L93 Difference]: Finished difference Result 729 states and 906 transitions. [2022-01-31 18:22:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:22:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.011111111111111) internal successors, (271), 88 states have internal predecessors, (271), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 277 [2022-01-31 18:22:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:24,991 INFO L225 Difference]: With dead ends: 729 [2022-01-31 18:22:24,991 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 18:22:24,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11490, Invalid=19662, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 18:22:24,993 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1964 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 1222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1222 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:24,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1966 Valid, 31 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1222 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:22:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 18:22:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 285. [2022-01-31 18:22:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 277 states have (on average 1.0144404332129964) internal successors, (281), 277 states have internal predecessors, (281), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:22:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-01-31 18:22:25,250 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 277 [2022-01-31 18:22:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:25,250 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-01-31 18:22:25,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.011111111111111) internal successors, (271), 88 states have internal predecessors, (271), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:22:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-01-31 18:22:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-01-31 18:22:25,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:25,251 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:25,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:22:25,252 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:25,252 INFO L85 PathProgramCache]: Analyzing trace with hash 926783080, now seen corresponding path program 85 times [2022-01-31 18:22:25,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:25,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46992266] [2022-01-31 18:22:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:25,253 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:25,253 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:25,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:25,254 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:27,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:27,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:22:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:27,492 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 18:22:27,492 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:27,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46992266] [2022-01-31 18:22:27,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [46992266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:27,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:27,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:22:27,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596311013] [2022-01-31 18:22:27,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:27,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:22:27,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:27,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:22:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3920, Invalid=4270, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:22:27,495 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 91 states, 91 states have (on average 3.010989010989011) internal successors, (274), 89 states have internal predecessors, (274), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:22:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:46,488 INFO L93 Difference]: Finished difference Result 737 states and 916 transitions. [2022-01-31 18:22:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:22:46,488 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.010989010989011) internal successors, (274), 89 states have internal predecessors, (274), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 280 [2022-01-31 18:22:46,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:46,490 INFO L225 Difference]: With dead ends: 737 [2022-01-31 18:22:46,490 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 18:22:46,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11754, Invalid=20108, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 18:22:46,491 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1703 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:46,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 39 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1056 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 18:22:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 18:22:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 288. [2022-01-31 18:22:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 280 states have internal predecessors, (284), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:22:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 291 transitions. [2022-01-31 18:22:46,757 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 291 transitions. Word has length 280 [2022-01-31 18:22:46,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:46,758 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 291 transitions. [2022-01-31 18:22:46,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.010989010989011) internal successors, (274), 89 states have internal predecessors, (274), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:22:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 291 transitions. [2022-01-31 18:22:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 18:22:46,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:46,759 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:46,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:22:46,759 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:46,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1951679164, now seen corresponding path program 86 times [2022-01-31 18:22:46,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956405233] [2022-01-31 18:22:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:46,760 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:46,760 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:46,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:46,762 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:49,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:49,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:22:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:49,041 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 18:22:49,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956405233] [2022-01-31 18:22:49,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [956405233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:49,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:49,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:22:49,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771531640] [2022-01-31 18:22:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:22:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:22:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4009, Invalid=4363, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:22:49,044 INFO L87 Difference]: Start difference. First operand 288 states and 291 transitions. Second operand has 92 states, 92 states have (on average 3.010869565217391) internal successors, (277), 90 states have internal predecessors, (277), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:23:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:08,753 INFO L93 Difference]: Finished difference Result 745 states and 926 transitions. [2022-01-31 18:23:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:23:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.010869565217391) internal successors, (277), 90 states have internal predecessors, (277), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 283 [2022-01-31 18:23:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:08,755 INFO L225 Difference]: With dead ends: 745 [2022-01-31 18:23:08,755 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 18:23:08,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4090 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12021, Invalid=20559, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 18:23:08,756 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1774 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 1105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:08,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 35 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:23:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 18:23:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 291. [2022-01-31 18:23:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 283 states have (on average 1.0141342756183747) internal successors, (287), 283 states have internal predecessors, (287), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:23:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 294 transitions. [2022-01-31 18:23:09,029 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 294 transitions. Word has length 283 [2022-01-31 18:23:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:09,029 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 294 transitions. [2022-01-31 18:23:09,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.010869565217391) internal successors, (277), 90 states have internal predecessors, (277), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:23:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 294 transitions. [2022-01-31 18:23:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-31 18:23:09,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:09,030 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:09,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 18:23:09,030 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -903358232, now seen corresponding path program 87 times [2022-01-31 18:23:09,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:09,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314322467] [2022-01-31 18:23:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:09,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:09,031 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:09,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:09,033 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:11,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:11,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:23:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:11,368 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 18:23:11,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:11,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314322467] [2022-01-31 18:23:11,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314322467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:11,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:11,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:23:11,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145676743] [2022-01-31 18:23:11,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:11,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 18:23:11,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:11,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 18:23:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=4457, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:23:11,371 INFO L87 Difference]: Start difference. First operand 291 states and 294 transitions. Second operand has 93 states, 93 states have (on average 3.010752688172043) internal successors, (280), 91 states have internal predecessors, (280), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:23:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:31,903 INFO L93 Difference]: Finished difference Result 753 states and 936 transitions. [2022-01-31 18:23:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 18:23:31,904 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.010752688172043) internal successors, (280), 91 states have internal predecessors, (280), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 286 [2022-01-31 18:23:31,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:31,905 INFO L225 Difference]: With dead ends: 753 [2022-01-31 18:23:31,905 INFO L226 Difference]: Without dead ends: 741 [2022-01-31 18:23:31,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4181 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12291, Invalid=21015, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 18:23:31,906 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2030 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 1282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2032 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1282 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:31,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2032 Valid, 29 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1282 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:23:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-31 18:23:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 294. [2022-01-31 18:23:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 286 states have (on average 1.013986013986014) internal successors, (290), 286 states have internal predecessors, (290), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:23:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 297 transitions. [2022-01-31 18:23:32,185 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 297 transitions. Word has length 286 [2022-01-31 18:23:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:32,185 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 297 transitions. [2022-01-31 18:23:32,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.010752688172043) internal successors, (280), 91 states have internal predecessors, (280), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:23:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 297 transitions. [2022-01-31 18:23:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 18:23:32,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:32,186 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:32,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 18:23:32,187 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash 918317764, now seen corresponding path program 88 times [2022-01-31 18:23:32,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:32,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981570794] [2022-01-31 18:23:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:32,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:32,189 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:32,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:32,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:34,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:34,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:23:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:34,573 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 18:23:34,573 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981570794] [2022-01-31 18:23:34,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981570794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:34,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:34,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 18:23:34,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491910065] [2022-01-31 18:23:34,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:34,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:23:34,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:23:34,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4190, Invalid=4552, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:23:34,576 INFO L87 Difference]: Start difference. First operand 294 states and 297 transitions. Second operand has 94 states, 94 states have (on average 3.0106382978723403) internal successors, (283), 92 states have internal predecessors, (283), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:23:55,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:55,424 INFO L93 Difference]: Finished difference Result 761 states and 946 transitions. [2022-01-31 18:23:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 18:23:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.0106382978723403) internal successors, (283), 92 states have internal predecessors, (283), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 289 [2022-01-31 18:23:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:55,426 INFO L225 Difference]: With dead ends: 761 [2022-01-31 18:23:55,426 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 18:23:55,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12564, Invalid=21476, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 18:23:55,427 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1895 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 1191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1191 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:55,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1897 Valid, 29 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1191 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:23:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 18:23:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 297. [2022-01-31 18:23:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 289 states have (on average 1.013840830449827) internal successors, (293), 289 states have internal predecessors, (293), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:23:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 300 transitions. [2022-01-31 18:23:55,714 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 300 transitions. Word has length 289 [2022-01-31 18:23:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:55,714 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 300 transitions. [2022-01-31 18:23:55,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.0106382978723403) internal successors, (283), 92 states have internal predecessors, (283), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:23:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 300 transitions. [2022-01-31 18:23:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-01-31 18:23:55,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:55,715 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:55,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 18:23:55,715 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:55,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:55,715 INFO L85 PathProgramCache]: Analyzing trace with hash -738837656, now seen corresponding path program 89 times [2022-01-31 18:23:55,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:55,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608926731] [2022-01-31 18:23:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:55,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:55,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:55,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:55,721 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:58,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:58,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:23:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:58,161 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 18:23:58,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608926731] [2022-01-31 18:23:58,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608926731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:58,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:58,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 18:23:58,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791902311] [2022-01-31 18:23:58,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:58,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 18:23:58,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:58,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 18:23:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=4648, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 18:23:58,164 INFO L87 Difference]: Start difference. First operand 297 states and 300 transitions. Second operand has 95 states, 95 states have (on average 3.0105263157894737) internal successors, (286), 93 states have internal predecessors, (286), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:24:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:19,777 INFO L93 Difference]: Finished difference Result 769 states and 956 transitions. [2022-01-31 18:24:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 18:24:19,778 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0105263157894737) internal successors, (286), 93 states have internal predecessors, (286), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 292 [2022-01-31 18:24:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:19,779 INFO L225 Difference]: With dead ends: 769 [2022-01-31 18:24:19,779 INFO L226 Difference]: Without dead ends: 757 [2022-01-31 18:24:19,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12840, Invalid=21942, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 18:24:19,781 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2141 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 1346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1346 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:19,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2143 Valid, 31 Invalid, 2812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1346 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:24:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-31 18:24:20,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 300. [2022-01-31 18:24:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 292 states have (on average 1.0136986301369864) internal successors, (296), 292 states have internal predecessors, (296), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:24:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2022-01-31 18:24:20,073 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 292 [2022-01-31 18:24:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:20,073 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2022-01-31 18:24:20,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0105263157894737) internal successors, (286), 93 states have internal predecessors, (286), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:24:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2022-01-31 18:24:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 18:24:20,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:20,074 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:20,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 18:24:20,075 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1593112644, now seen corresponding path program 90 times [2022-01-31 18:24:20,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:20,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308740944] [2022-01-31 18:24:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:20,076 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:20,076 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:20,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:20,078 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:22,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:24:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:22,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308740944] [2022-01-31 18:24:22,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308740944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:22,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:22,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 18:24:22,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069227411] [2022-01-31 18:24:22,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:22,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 18:24:22,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 18:24:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4375, Invalid=4745, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 18:24:22,568 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 96 states, 96 states have (on average 3.0104166666666665) internal successors, (289), 94 states have internal predecessors, (289), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:24:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:44,800 INFO L93 Difference]: Finished difference Result 777 states and 966 transitions. [2022-01-31 18:24:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 18:24:44,800 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.0104166666666665) internal successors, (289), 94 states have internal predecessors, (289), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 295 [2022-01-31 18:24:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:44,801 INFO L225 Difference]: With dead ends: 777 [2022-01-31 18:24:44,801 INFO L226 Difference]: Without dead ends: 765 [2022-01-31 18:24:44,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4460 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13119, Invalid=22413, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 18:24:44,803 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1857 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1859 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:44,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1859 Valid, 29 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:24:44,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-31 18:24:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 303. [2022-01-31 18:24:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:24:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 306 transitions. [2022-01-31 18:24:45,099 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 306 transitions. Word has length 295 [2022-01-31 18:24:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:45,099 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 306 transitions. [2022-01-31 18:24:45,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.0104166666666665) internal successors, (289), 94 states have internal predecessors, (289), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:24:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 306 transitions. [2022-01-31 18:24:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-01-31 18:24:45,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:45,100 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:45,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 18:24:45,100 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1628487144, now seen corresponding path program 91 times [2022-01-31 18:24:45,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:45,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312206691] [2022-01-31 18:24:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:45,102 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:45,102 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:45,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:45,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:47,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:47,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:24:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:47,638 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 18:24:47,638 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312206691] [2022-01-31 18:24:47,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [312206691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:47,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:47,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 18:24:47,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7009110] [2022-01-31 18:24:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:47,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 18:24:47,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 18:24:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4469, Invalid=4843, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 18:24:47,641 INFO L87 Difference]: Start difference. First operand 303 states and 306 transitions. Second operand has 97 states, 97 states have (on average 3.0103092783505154) internal successors, (292), 95 states have internal predecessors, (292), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:25:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:10,578 INFO L93 Difference]: Finished difference Result 785 states and 976 transitions. [2022-01-31 18:25:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 18:25:10,579 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0103092783505154) internal successors, (292), 95 states have internal predecessors, (292), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 298 [2022-01-31 18:25:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:10,580 INFO L225 Difference]: With dead ends: 785 [2022-01-31 18:25:10,580 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 18:25:10,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4555 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13401, Invalid=22889, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 18:25:10,582 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1868 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 1171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1171 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:10,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1870 Valid, 39 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1171 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:25:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 18:25:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 306. [2022-01-31 18:25:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 298 states have (on average 1.0134228187919463) internal successors, (302), 298 states have internal predecessors, (302), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:25:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 309 transitions. [2022-01-31 18:25:10,890 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 309 transitions. Word has length 298 [2022-01-31 18:25:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:10,890 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 309 transitions. [2022-01-31 18:25:10,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0103092783505154) internal successors, (292), 95 states have internal predecessors, (292), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:25:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 309 transitions. [2022-01-31 18:25:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 18:25:10,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:10,891 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:10,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 18:25:10,891 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:10,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1091738172, now seen corresponding path program 92 times [2022-01-31 18:25:10,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:10,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336261949] [2022-01-31 18:25:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:10,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:10,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:25:10,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:10,895 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:13,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:13,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:25:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:13,498 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 18:25:13,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:13,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336261949] [2022-01-31 18:25:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336261949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:13,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:13,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 18:25:13,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519751560] [2022-01-31 18:25:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:13,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 18:25:13,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 18:25:13,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4564, Invalid=4942, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 18:25:13,499 INFO L87 Difference]: Start difference. First operand 306 states and 309 transitions. Second operand has 98 states, 98 states have (on average 3.010204081632653) internal successors, (295), 96 states have internal predecessors, (295), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:25:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:37,257 INFO L93 Difference]: Finished difference Result 793 states and 986 transitions. [2022-01-31 18:25:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 18:25:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.010204081632653) internal successors, (295), 96 states have internal predecessors, (295), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 301 [2022-01-31 18:25:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:37,259 INFO L225 Difference]: With dead ends: 793 [2022-01-31 18:25:37,259 INFO L226 Difference]: Without dead ends: 781 [2022-01-31 18:25:37,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13686, Invalid=23370, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 18:25:37,261 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2138 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:37,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2140 Valid, 27 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:25:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-31 18:25:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 309. [2022-01-31 18:25:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 301 states have (on average 1.0132890365448506) internal successors, (305), 301 states have internal predecessors, (305), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:25:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 312 transitions. [2022-01-31 18:25:37,575 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 312 transitions. Word has length 301 [2022-01-31 18:25:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:37,575 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 312 transitions. [2022-01-31 18:25:37,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.010204081632653) internal successors, (295), 96 states have internal predecessors, (295), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:25:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 312 transitions. [2022-01-31 18:25:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-01-31 18:25:37,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:37,576 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:37,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 18:25:37,576 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1881186200, now seen corresponding path program 93 times [2022-01-31 18:25:37,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:37,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038810316] [2022-01-31 18:25:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:37,578 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:37,578 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:25:37,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:37,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:40,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:40,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:25:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:40,210 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 18:25:40,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:40,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038810316] [2022-01-31 18:25:40,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038810316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:40,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:40,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 18:25:40,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355284155] [2022-01-31 18:25:40,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:40,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 18:25:40,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 18:25:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4660, Invalid=5042, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 18:25:40,213 INFO L87 Difference]: Start difference. First operand 309 states and 312 transitions. Second operand has 99 states, 99 states have (on average 3.01010101010101) internal successors, (298), 97 states have internal predecessors, (298), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:26:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:04,948 INFO L93 Difference]: Finished difference Result 801 states and 996 transitions. [2022-01-31 18:26:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 18:26:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.01010101010101) internal successors, (298), 97 states have internal predecessors, (298), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 304 [2022-01-31 18:26:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:04,950 INFO L225 Difference]: With dead ends: 801 [2022-01-31 18:26:04,950 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 18:26:04,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4748 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13974, Invalid=23856, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 18:26:04,952 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1904 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 1178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1178 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:04,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 35 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1178 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 18:26:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 18:26:05,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 312. [2022-01-31 18:26:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 304 states have (on average 1.013157894736842) internal successors, (308), 304 states have internal predecessors, (308), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:26:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 315 transitions. [2022-01-31 18:26:05,273 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 315 transitions. Word has length 304 [2022-01-31 18:26:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:05,273 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 315 transitions. [2022-01-31 18:26:05,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.01010101010101) internal successors, (298), 97 states have internal predecessors, (298), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:26:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 315 transitions. [2022-01-31 18:26:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 18:26:05,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:05,274 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:05,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 18:26:05,274 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1086475452, now seen corresponding path program 94 times [2022-01-31 18:26:05,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:05,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241609610] [2022-01-31 18:26:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:05,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:05,276 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:05,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:05,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:26:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:07,949 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:07,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241609610] [2022-01-31 18:26:07,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241609610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:07,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:07,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 18:26:07,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497599140] [2022-01-31 18:26:07,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:07,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 18:26:07,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:07,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 18:26:07,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4757, Invalid=5143, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 18:26:07,954 INFO L87 Difference]: Start difference. First operand 312 states and 315 transitions. Second operand has 100 states, 100 states have (on average 3.01) internal successors, (301), 98 states have internal predecessors, (301), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:26:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:33,861 INFO L93 Difference]: Finished difference Result 809 states and 1006 transitions. [2022-01-31 18:26:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 18:26:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.01) internal successors, (301), 98 states have internal predecessors, (301), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 307 [2022-01-31 18:26:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:33,863 INFO L225 Difference]: With dead ends: 809 [2022-01-31 18:26:33,863 INFO L226 Difference]: Without dead ends: 797 [2022-01-31 18:26:33,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4846 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14265, Invalid=24347, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 18:26:33,865 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2040 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 1273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1273 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:33,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2042 Valid, 31 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1273 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:26:33,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-31 18:26:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 315. [2022-01-31 18:26:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 307 states have (on average 1.013029315960912) internal successors, (311), 307 states have internal predecessors, (311), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:26:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2022-01-31 18:26:34,210 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 307 [2022-01-31 18:26:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:34,210 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2022-01-31 18:26:34,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.01) internal successors, (301), 98 states have internal predecessors, (301), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:26:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2022-01-31 18:26:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-31 18:26:34,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:34,211 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:34,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 18:26:34,211 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:34,211 INFO L85 PathProgramCache]: Analyzing trace with hash 281682664, now seen corresponding path program 95 times [2022-01-31 18:26:34,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:34,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642342679] [2022-01-31 18:26:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:34,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:34,213 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:34,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:34,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:26:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:36,957 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 18:26:36,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:36,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642342679] [2022-01-31 18:26:36,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1642342679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:36,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:36,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 18:26:36,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551215518] [2022-01-31 18:26:36,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:36,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 18:26:36,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:36,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 18:26:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4855, Invalid=5245, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 18:26:36,959 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 101 states, 101 states have (on average 3.00990099009901) internal successors, (304), 99 states have internal predecessors, (304), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:27:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:03,599 INFO L93 Difference]: Finished difference Result 817 states and 1016 transitions. [2022-01-31 18:27:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 18:27:03,599 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.00990099009901) internal successors, (304), 99 states have internal predecessors, (304), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 310 [2022-01-31 18:27:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:03,600 INFO L225 Difference]: With dead ends: 817 [2022-01-31 18:27:03,601 INFO L226 Difference]: Without dead ends: 805 [2022-01-31 18:27:03,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4945 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14559, Invalid=24843, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 18:27:03,603 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2010 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 1259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2012 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1259 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:03,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2012 Valid, 33 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1259 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 18:27:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-31 18:27:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 318. [2022-01-31 18:27:03,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:27:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 321 transitions. [2022-01-31 18:27:03,939 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 321 transitions. Word has length 310 [2022-01-31 18:27:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:03,940 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 321 transitions. [2022-01-31 18:27:03,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.00990099009901) internal successors, (304), 99 states have internal predecessors, (304), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 18:27:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 321 transitions. [2022-01-31 18:27:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 18:27:03,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:03,941 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:03,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 18:27:03,941 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash -159522620, now seen corresponding path program 96 times [2022-01-31 18:27:03,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:03,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336748762] [2022-01-31 18:27:03,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:03,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:03,943 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:27:03,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:03,945 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:06,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:06,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 18:27:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:06,735 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 18:27:06,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:06,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336748762] [2022-01-31 18:27:06,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336748762] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:06,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:06,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 18:27:06,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672370404] [2022-01-31 18:27:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:06,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 18:27:06,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 18:27:06,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4954, Invalid=5348, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 18:27:06,738 INFO L87 Difference]: Start difference. First operand 318 states and 321 transitions. Second operand has 102 states, 102 states have (on average 3.0098039215686274) internal successors, (307), 100 states have internal predecessors, (307), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)